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1.
Phylogenetic and taxonomic relationships between morphotypes related to
Elymus caninus
(Poaceae) based on sequence of a nuclear gene
GBSS1
(
waxy
) and sexual hybridization
Alexander V. Agafonov, Elena V. Shabanova, Maria V. Emtseva, Sergey V. Asbaganov, Igor V. Morozov, Alexander A. Bondar, and Olga V. Dorogina
Journal of Systematics and Evolution 2024, 62 (
3
): 520-533. DOI:
10.1111/jse.13006
发布日期: 2023-07-31
预出版日期: 2023-07-31
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(
59
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We represent a comparative analysis of
GBSS1
gene fragment sequences for a number of species related to
Elymus caninus
:
Elymus prokudinii, Elymus viridiglumis, Elymus goloskokovii
, as well as a number of morphologically deviating biotypes, inhabiting Russia and Kazakhstan. Microevolutionary relationships between species were assessed from dendrograms derived from sequences of exons and introns. In all taxa, the
St
subgenome was represented by
St
2
variants, rather typical of the North American ancestral line of
Pseudoroegneria spicata
than of the Asian line descending from
Pseudoroegneria strigosa
. All putative relatives of
E. caninus
had
H
1
subgenome variants linked around the Asian diploid carrier of the
H
genome from
Hordeum jubatum
and were divided into two subclades. One of them (
H
1-1
) contained most of the closely related
E. caninus
clones, including
Elymus uralensis
. Another subclade (
H
1-2
) consisted of five variants phylogenetically related to
Elymus mutabilis
. We have also studied reproductive relationships between species
E. goloskokovii, E. prokudinii
, and
E. viridiglumis
and the degree of their integration into the
E. caninus
complex. Biotypes included in sexual hybridization formed a single recombination gene pool, within which slight differences in reproductive compatibility were observed. A comprehensive study of microevolutionary differentiation of taxa showed the expediency of taxonomic revision. The species mentioned should probably be relegated to the infraspecific rank within
E. caninus
s. l.
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2.
Heat Shock Factor A1s are required for phytochrome-interacting factor 4-mediated thermomorphogenesis in Arabidopsis
Bingjie Li, Shimeng Jiang, Liang Gao, Wenhui Wang, Haozheng Luo, Yining Dong, Zhihua Gao, Shuzhi Zheng, Xinye Liu and Wenqiang Tang
J Integr Plant Biol 2024, 66 (
1
): 20-35. DOI:
10.1111/jipb.13579
发布日期: 2023-10-31
预出版日期: 2023-10-31
摘要
(
167
)
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Thermomorphogenesis and the heat shock (HS) response are distinct thermal responses in plants that are regulated by PHYTOCHROME-INTERACTING FACTOR 4 (PIF4) and HEAT SHOCK FACTOR A1s (HSFA1s), respectively. Little is known about whether these responses are interconnected and whether they are activated by similar mechanisms. An analysis of transcriptome dynamics in response to warm temperature (28℃) treatment revealed that 30 min of exposure activated the expression of a subset of HSFA1 target genes in
Arabidopsis thaliana
. Meanwhile, a loss-of-function
HSFA1
quadruple mutant (
hsfa1-cq
) was insensitive to warm temperature-induced hypocotyl growth. In
hsfa1-cq
plants grown at 28℃, the protein and transcript levels of PIF4 were greatly reduced, and the circadian rhythm of many thermomorphogenesis-related genes (including
PIF4
) was disturbed. Additionally, the nuclear localization of HSFA1s and the binding of HSFA1d to the
PIF4
promoter increased following warm temperature exposure, whereas
PIF4
overexpression in
hsfa1-cq
partially rescued the altered warm temperature-induced hypocotyl growth of the mutant. Taken together, these results suggest that HSFA1s are required for PIF4 accumulation at a warm temperature, and they establish a central role for HSFA1s in regulating both thermomorphogenesis and HS responses in Arabidopsis.
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3.
Temporal control of the Aux/IAA genes
BnIAA32
and
BnIAA34
mediates
Brassica napus
dual shade responses
Yafei Li, Yiyi Guo, Yue Cao, Pengguo Xia, Dongqing Xu, Ning Sun, Lixi Jiang and Jie Dong
J Integr Plant Biol 2024, 66 (
5
): 928-962. DOI:
10.1111/jipb.13582
发布日期: 2023-11-06
预出版日期: 2023-11-06
摘要
(
214
)
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Precise responses to changes in light quality are crucial for plant growth and development. For example, hypocotyls of shade-avoiding plants typically elongate under shade conditions. Although this typical shade-avoidance response (TSR) has been studied in Arabidopsis (
Arabidopsis thaliana
), the molecular mechanisms underlying shade tolerance are poorly understood. Here we report that
B. napus
(
Brassica napus
) seedlings exhibit dual shade responses. In addition to the TSR,
B. napus
seedlings also display an atypical shade response (ASR), with shorter hypocotyls upon perception of early-shade cues. Genome-wide selective sweep analysis indicated that ASR is associated with light and auxin signaling. Moreover, genetic studies demonstrated that phytochrome A (BnphyA) promotes ASR, whereas BnphyB inhibits it. During ASR,
YUCCA8
expression is activated by early-shade cues, leading to increased auxin biosynthesis. This inhibits hypocotyl elongation, as young
B. napus
seedlings are highly sensitive to auxin. Notably, two non-canonical AUXIN/INDOLE-3-ACETIC ACID (Aux/IAA) repressor genes,
BnIAA32
and
BnIAA34
, are expressed during this early stage. BnIAA32 and BnIAA34 inhibit hypocotyl elongation under shade conditions, and mutations in
BnIAA32
and
BnIAA34
suppress ASR. Collectively, our study demonstrates that the temporal expression of
BnIAA32
and
BnIAA34
determines the behavior of
B. napus
seedlings following shade-induced auxin biosynthesis.
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4.
Trade-offs between the accumulation of cuticular wax and jasmonic acid-mediated herbivory resistance in maize
Jiong Liu, Lu Li, Zhilong Xiong, Christelle A.M. Robert, Baozhu Li, Shan He, Wenjie Chen, Jiasheng Bi, Guanqing Zhai, Siyi Guo, Hui Zhang, Jieping Li, Shutang Zhou, Xi Zhang and Chun‐Peng Song
J Integr Plant Biol 2024, 66 (
1
): 143-159. DOI:
10.1111/jipb.13586
发布日期: 2023-11-17
预出版日期: 2023-11-17
摘要
(
168
)
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Plants have evolved complex physical and chemical defense systems that allow them to withstand herbivory infestation. Composed of a complex mixture of very-long-chain fatty acids (VLCFAs) and their derivatives, cuticular wax constitutes the first physical line of defense against herbivores. Here, we report the function of
Glossy 8
(
ZmGL8
), which encodes a 3-ketoacyl reductase belonging to the fatty acid elongase complex, in orchestrating wax production and jasmonic acid (JA)-mediated defenses against herbivores in maize (
Zea mays
). The mutation of
GL8
enhanced chemical defenses by activating the JA-dependent pathway. We observed a trade-off between wax accumulation and JA levels across maize
glossy
mutants and 24 globally collected maize inbred lines. In addition, we demonstrated that mutants defective in cuticular wax biosynthesis in
Arabidopsis thaliana
and maize exhibit enhanced chemical defenses. Comprehensive transcriptomic and lipidomic analyses indicated that the
gl8
mutant confers chemical resistance to herbivores by remodeling VLCFA-related lipid metabolism and subsequent JA biosynthesis and signaling. These results suggest that VLCFA-related lipid metabolism has a critical role in regulating the trade-offs between cuticular wax and JA-mediated chemical defenses.
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5.
Gibberellin promotes cambium reestablishment during secondary vascular tissue regeneration after girdling in an auxin-dependent manner in
Populus
Yufei Zhang, Lingyan Wang, Yuexin Wu, Donghui Wang and Xin‐Qiang He
J Integr Plant Biol 2024, 66 (
1
): 86-102. DOI:
10.1111/jipb.13591
发布日期: 2023-12-05
预出版日期: 2023-12-05
摘要
(
102
)
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Secondary vascular tissue (SVT) development and regeneration are regulated by phytohormones. In this study, we used an
in vitro
SVT regeneration system to demonstrate that gibberellin (GA) treatment significantly promotes auxin-induced cambium reestablishment. Altering GA content by overexpressing or knocking down
ent-kaurene synthase
(
KS
) affected secondary growth and SVT regeneration in poplar. The poplar DELLA gene
GIBBERELLIC ACID INSENSITIVE
(
PtoGAI
) is expressed in a specific pattern during secondary growth and cambium regeneration after girdling. Overexpression of
PtoGAI
disrupted poplar growth and inhibited cambium regeneration, and the inhibition of cambium regeneration could be partially restored by GA application. Further analysis of the
PtaDR5:GUS
transgenic plants, the localization of PIN-FORMED 1 (PIN1) and the expression of auxin-related genes found that an additional GA treatment could enhance the auxin response as well as the expression of
PIN1
, which mediates auxin transport during SVT regeneration. Taken together, these findings suggest that GA promotes cambium regeneration by stimulating auxin signal transduction.
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6.
TaRLK-6A
promotes
Fusarium
crown rot resistance in wheat
Haijun Qi, Xiuliang Zhu, Wenbiao Shen, Xia Yang, Chaozhong Zhang, Genying Li, Feng Chen, Xuening Wei and Zengyan Zhang
J Integr Plant Biol 2024, 66 (
1
): 12-16. DOI:
10.1111/jipb.13596
发布日期: 2023-12-16
预出版日期: 2023-12-16
摘要
(
116
)
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7.
Designing salt stress-resilient crops: Current progress and future challenges
Xiaoyan Liang, Jianfang Li, Yongqing Yang, Caifu Jiang and Yan Guo
J Integr Plant Biol 2024, 66 (
3
): 303-329. DOI:
10.1111/jipb.13599
发布日期: 2023-12-18
预出版日期: 2023-12-18
摘要
(
167
)
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Excess soil salinity affects large regions of land and is a major hindrance to crop production worldwide. Therefore, understanding the molecular mechanisms of plant salt tolerance has scientific importance and practical significance. In recent decades, studies have characterized hundreds of genes associated with plant responses to salt stress in different plant species. These studies have substantially advanced our molecular and genetic understanding of salt tolerance in plants and have introduced an era of molecular design breeding of salt-tolerant crops. This review summarizes our current knowledge of plant salt tolerance, emphasizing advances in elucidating the molecular mechanisms of osmotic stress tolerance, salt-ion transport and compartmentalization, oxidative stress tolerance, alkaline stress tolerance, and the trade-off between growth and salt tolerance. We also examine recent advances in understanding natural variation in the salt tolerance of crops and discuss possible strategies and challenges for designing salt stress-resilient crops. We focus on the model plant Arabidopsis (
Arabidopsis thaliana
) and the four most-studied crops: rice (
Oryza sativa
), wheat (
Triticum aestivum
), maize (
Zea mays
), and soybean (
Glycine max
).
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8.
TaSRO1 interacts with TaVP1 to modulate seed dormancy and pre-harvest sprouting resistance in wheat
Shupeng Liu, Li Li, Wenlong Wang, Guangmin Xia and Shuwei Liu
J Integr Plant Biol 2024, 66 (
1
): 36-53. DOI:
10.1111/jipb.13600
发布日期: 2023-12-18
预出版日期: 2023-12-18
摘要
(
106
)
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Dormancy is an adaptive trait which prevents seeds from germinating under unfavorable environmental conditions. Seeds with weak dormancy undergo pre-harvest sprouting (PHS) which decreases grain yield and quality. Understanding the genetic mechanisms that regulate seed dormancy and resistance to PHS is crucial for ensuring global food security. In this study, we illustrated the function and molecular mechanism of TaSRO1 in the regulation of seed dormancy and PHS resistance by suppressing TaVP1. The
tasro1
mutants exhibited strong seed dormancy and enhanced resistance to PHS, whereas the mutants of
tavp1
displayed weak dormancy. Genetic evidence has shown that
TaVP1
is epistatic to
TaSRO1
. Biochemical evidence has shown that TaSRO1 interacts with TaVP1 and represses the transcriptional activation of the PHS resistance genes
TaPHS1
and
TaSdr
. Furthermore, TaSRO1 undermines the synergistic activation of TaVP1 and TaABI5 in PHS resistance genes. Finally, we highlight the great potential of
tasro1
alleles for breeding elite wheat cultivars that are resistant to PHS.
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9.
Reactive oxygen species: Multidimensional regulators of plant adaptation to abiotic stress and development
Pengtao Wang, Wen‐Cheng Liu, Chao Han, Situ Wang, Ming‐Yi Bai and Chun‐Peng Song
J Integr Plant Biol 2024, 66 (
3
): 330-367. DOI:
10.1111/jipb.13601
发布日期: 2023-12-20
预出版日期: 2023-12-20
摘要
(
217
)
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Reactive oxygen species (ROS) are produced as undesirable by-products of metabolism in various cellular compartments, especially in response to unfavorable environmental conditions, throughout the life cycle of plants. Stress-induced ROS production disrupts normal cellular function and leads to oxidative damage. To cope with excessive ROS, plants are equipped with a sophisticated antioxidative defense system consisting of enzymatic and non-enzymatic components that scavenge ROS or inhibit their harmful effects on biomolecules. Nonetheless, when maintained at relatively low levels, ROS act as signaling molecules that regulate plant growth, development, and adaptation to adverse conditions. Here, we provide an overview of current approaches for detecting ROS. We also discuss recent advances in understanding ROS signaling, ROS metabolism, and the roles of ROS in plant growth and responses to various abiotic stresses.
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10.
Environmentally adaptive reshaping of plant photomorphogenesis by karrikin and strigolactone signaling
Young-Joon Park, Bo Eun Nam and Chung-Mo Park
J Integr Plant Biol 2024, 66 (
5
): 865-882. DOI:
10.1111/jipb.13602
发布日期: 2023-12-20
预出版日期: 2023-12-20
摘要
(
106
)
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Coordinated morphogenic adaptation of growing plants is critical for their survival and propagation under fluctuating environments. Plant morphogenic responses to light and warm temperatures, termed photomorphogenesis and thermomorphogenesis, respectively, have been extensively studied in recent decades. During photomorphogenesis, plants actively reshape their growth and developmental patterns to cope with changes in light regimes. Accordingly, photomorphogenesis is closely associated with diverse growth hormonal cues. Notably, accumulating evidence indicates that light-directed morphogenesis is profoundly affected by two recently identified phytochemicals, karrikins (KARs) and strigolactones (SLs). KARs and SLs are structurally related butenolides acting as signaling molecules during a variety of developmental steps, including seed germination. Their receptors and signaling mediators have been identified, and associated working mechanisms have been explored using gene-deficient mutants in various plant species. Of particular interest is that the KAR and SL signaling pathways play important roles in environmental responses, among which their linkages with photomorphogenesis are most comprehensively studied during seedling establishment. In this review, we focus on how the phytochemical and light signals converge on the optimization of morphogenic fitness. We also discuss molecular mechanisms underlying the signaling crosstalks with an aim of developing potential ways to improve crop productivity under climate changes.
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11.
氮添加对内蒙古草原植物地上和地下碳氮磷化学计量学特征的影响
Ziqi Wang, Jie Wang, Honghui Wu, Tian Yang, Yixin An, Yunlong Zhang, Jianlin Bian, Ying Li, Haiyan Ren, Ariuntsetseg Lkhagva, Xu Wang, Qiang Yu
Journal of Plant Ecology 2024, 17 (
1
): 0-rtad041. DOI:
10.1093/jpe/rtad041
预出版日期: 2023-12-05
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(
69
)
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氮沉降对生态系统功能和过程具有显著影响。已有研究表明氮添加会影响植物叶片C:N:P化学计量特征。然而,氮添加对植物根系C:N:P化学计量特征影响的研究罕有报道。本论文的主要目的是对比氮添加对草原植物群落地上和地下C:N:P化学计量特征的影响。我们在内蒙古锡林郭勒草原开展了一个7年的氮添加实验,该实验包括6个处理,分别是对照:control; N1: 0.4 mol·m
-2
N; N2: 0.8 mol·m
-2
N; N3: 1.6 mol·m
-2
N; N4: 2.8 mol·m
-2
N; N5: 4 mol·m
-2
N,每个处理6次重复。我们测量并分析了植物地上、地下生物量和C:N:P化学计量特征。研究结果表明,氮添加会导致植物群落地上部分碳浓度降低,氮浓度和磷浓度升高,C:N和C:P比值降低,N:P升高,而且地上碳、氮、磷库均因施氮而增加。然而,氮添加对0-10,10-30,30-50和50-100 cm 4个土层的地下部分碳、氮、磷浓度、比例、库和化学计量特征没有显著影响。综上所述,氮添加会显著改变植物群落地上部分C:N:P化学计量特征,进而影响草地生态系统的功能和过程,但对地下C:N:P化学计量特征几乎没有影响。
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12.
祁连山植物共有种沿海拔梯度的叶片化学计量特征
Shuyan Hong, Jie Chen, Asim Biswas, Jianjun Cao, Xiaogang Dong
Journal of Plant Ecology 2024, 17 (
1
): 0-rtad044. DOI:
10.1093/jpe/rtad044
预出版日期: 2023-12-09
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91
)
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研究不同海拔地区植物共有种叶片化学计量的变化及其影响因素和适应策略,对于理解全球环境变化中的生物地球化学循环具有重要意义。在本研究中,我们测量了中国西北部祁连山5个海拔高度(海拔2400-3200 m,间隔200 m)的土壤有机碳和养分浓度,以及植物共有种的叶片化学计量,以期能更好地了解山区植物共有种如何对海拔变化表现出适应性反应及未来潜在的环境变化如何影响其叶片功能。研究结果表明,随海拔高度的增加,植物共有种叶片C:N:P化学计量的变化不同。在不同的海拔梯度上,年平均气温(MAT)、土壤全磷(STP)、年平均降水量(MAP)、土壤含水量(SWC)和土壤硝态氮(NO
3
-
N)是影响植物共有种叶片元素浓度的主要因素。而叶片化学计量比主要由 MAT、MAP 和土壤全氮(STN)决定。MAT和MAP对植物共有种叶片元素浓度和叶化学计量比均有显著影响。研究区植物生长主要受到磷的限制。研究结果不仅凸显了植物的可塑性生存策略,还有助于加深我们对植物叶片化学计量学的理解,建立单个植物物种和植物群落与共有种之间的联系。
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13.
Independent genetic differentiation between upland and lowland rice ecotypes within
japonica
and
indica
subspecies during their adaptations to different soil-nitrogen conditions
Heng-Ling Zhou, Lei Wang, Yun-Xia Yue, Zhi Luo, Shun-Jie Wang, Li-Guo Zhou, Li-Jun Luo, Hui Xia, and Ming Yan
Journal of Systematics and Evolution 2024, 62 (
5
): 915-927. DOI:
10.1111/jse.13046
发布日期: 2024-01-25
预出版日期: 2024-01-25
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(
142
)
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The soil-nitrogen condition, which differs greatly between paddy fields (mainly in the form of ammonium, NH
4
+
) and dry fields (mainly in the form of nitrate, NO
3
-
), is a main environmental factor that drives the adaptive differentiation between upland and lowland rice ecotypes. However, the adaptive differentiation in terms of the nitrogen use efficiency (NUE) between upland and lowland rice has not been well addressed. In this study, we evaluated NUE-related traits among rice landraces as well as the genetic differentiation between NUE- associated genes and quantitative trait loci (QTLs). The
japonica
upland and lowland rice ecotypes showed large differences in their NUE-related traits such as the absorption ability for NH
4
+
and NO
3
-
. The indica upland and lowland rice exhibited similar performances when cultivated in solutions containing NH
4
+
or NO
3
-
or when planted in paddy or dry fields. However, the
indica
upland rice possessed a greater ability to absorb NO
3
-
. We identified 76 QTLs for 25 measured traits using genome-wide association analysis. The highly differentiated NUE- associated genes or QTLs between ecotypes were rarely shared by
japonica
and
indica
subspecies, indicating an independent genetic basis for their soil-nitrogen adaptations. We suggested four genes in three QTLs as the candidates contributing to rice NUE during the ecotypic differentiation. In summary, the soil-nitrogen condition drives the adaptive differentiation of NUE between upland and lowland rice independently within the
japonica
and
indica
subspecies. These findings can strengthen our understanding of rice adaptation to divergent soil-nitrogen conditions and have implications for the improvement of NUE.
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14.
养分回收加剧了氮沉降背景下盐渍化草地优势植物内在氮磷的失衡
Yuan Su, Shuaikai Wu, Jie Hao, Huajie Diao, Kuanhu Dong, Changhui Wang
Journal of Plant Ecology 2024, 17 (
1
): 0-rtad049. DOI:
10.1093/jpe/rtad049
发布日期: 2024-01-04
预出版日期: 2024-01-04
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77
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在落叶之前,从衰老组织中重新吸收养分被认为是植物适应养分缺乏的一种策略。然而,养分重吸收如何调节植物体内氮(N)和磷(P)的平衡仍不清楚,特别是在土壤氮有效性增加的情况下。本文研究了不同速率(0、1、2、4、8、16、24 和32 g N m
-2
yr
-1
)氮添加对中国北方盐渍化草地优势植物赖草(Leymus secalinus)叶片和茎秆养分回收的影响,以及养分回收在调控植物内部氮磷平衡的作用。研究结果表明:氮添加6年后,随着施氮量的增加,绿色和衰老组织(叶和茎)的N浓度和氮磷比均呈上升趋势。随着施氮量的增加,绿色组织中P浓度降低,而衰老组织中P浓度无显著变化。N重吸收效率(NRE)、P重吸收效率(PRE)和NRE:PRE比值沿N添加梯度显著降低。此外,我们发现衰老组织(叶和茎)氮磷比比绿色组织(叶和茎)氮磷比对氮素添加的响应更敏感,植物内在氮磷失衡的加剧主要是由于不成比例的减少养分重吸收,尤其是NRE。总的来说,我们的研究表明,NRE和PRE的差异进一步加剧了植物凋落物内部氮磷的失衡。
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15.
Methyl-salicylate: A surveillance system for triggering immunity in neighboring plants
Saumya Jaiswal, Durgesh Kumar Tripathi, Ravi Gupta, Jing He, Zhong‐Hua Chen and Vijay Pratap Singh
J Integr Plant Biol 2024, 66 (
2
): 163-165. DOI:
10.1111/jipb.13621
发布日期: 2024-02-05
预出版日期: 2024-02-05
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89
)
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16.
Integrative regulatory mechanisms of stomatal movements under changing climate
Jingbo Zhang, Xuexue Chen, Yajing Song and Zhizhong Gong
J Integr Plant Biol 2024, 66 (
3
): 368-393. DOI:
10.1111/jipb.13611
发布日期: 2024-02-06
预出版日期: 2024-02-06
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98
)
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Global climate change-caused drought stress, high temperatures and other extreme weather profoundly impact plant growth and development, restricting sustainable crop production. To cope with various environmental stimuli, plants can optimize the opening and closing of stomata to balance CO
2
uptake for photosynthesis and water loss from leaves. Guard cells perceive and integrate various signals to adjust stomatal pores through turgor pressure regulation. Molecular mechanisms and signaling networks underlying the stomatal movements in response to environmental stresses have been extensively studied and elucidated. This review focuses on the molecular mechanisms of stomatal movements mediated by abscisic acid, light, CO
2
, reactive oxygen species, pathogens, temperature, and other phytohormones. We discussed the significance of elucidating the integrative mechanisms that regulate stomatal movements in helping design smart crops with enhanced water use efficiency and resilience in a climate-changing world.
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17.
PIF4 interacts with ABI4 to serve as a transcriptional activator complex to promote seed dormancy by enhancing ABA biosynthesis and signaling
Xiaofeng Luo, Yujia Dai, Baoshan Xian, Jiahui Xu, Ranran Zhang, Muhammad Saad Rehmani, Chuan Zheng, Xiaoting Zhao, Kaitao Mao, Xiaotong Ren, Shaowei Wei, Lei Wang, Juan He, Weiming Tan, Junbo Du, Weiguo Liu, Shu Yuan and Kai Shu
J Integr Plant Biol 2024, 66 (
5
): 909-927. DOI:
10.1111/jipb.13615
发布日期: 2024-02-08
预出版日期: 2024-02-08
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137
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Transcriptional regulation plays a key role in the control of seed dormancy, and many transcription factors (TFs) have been documented. However, the mechanisms underlying the interactions between different TFs within a transcriptional complex regulating seed dormancy remain largely unknown. Here, we showed that TF PHYTOCHROME-INTERACTING FACTOR4 (PIF4) physically interacted with the abscisic acid (ABA) signaling responsive TF ABSCISIC ACID INSENSITIVE4 (ABI4) to act as a transcriptional complex to promote ABA biosynthesis and signaling, finally deepening primary seed dormancy. Both
pif4
and
abi4
single mutants exhibited a decreased primary seed dormancy phenotype, with a synergistic effect in the
pif4/abi4
double mutant. PIF4 binds to ABI4 to form a heterodimer, and ABI4 stabilizes PIF4 at the protein level, whereas PIF4 does not affect the protein stabilization of ABI4. Subsequently, both TFs independently and synergistically promoted the expression of
ABI4
and
NCED6
, a key gene for ABA anabolism. The genetic evidence is also consistent with the phenotypic, physiological and biochemical analysis results. Altogether, this study revealed a transcriptional regulatory cascade in which the PIF4–ABI4 transcriptional activator complex synergistically enhanced seed dormancy by facilitating ABA biosynthesis and signaling.
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18.
Maize gets an iron boost: Biofortification breakthrough holds promise to combat iron deficiency
Sunil Kumar Sahu
J Integr Plant Biol 2024, 66 (
4
): 635-637. DOI:
10.1111/jipb.13623
发布日期: 2024-02-13
预出版日期: 2024-02-13
摘要
(
161
)
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19.
灯台树水提物对珙桐幼苗生长相关基因
DiSOC1-b
和
DiCCoAOMT1
表达水平的影响
Xiaoyan Chen, Zhengchuan Liang, Yun Long, Jihong Pan, Tingfa Dong, Qinsong Liu, Xiao Xu
Journal of Plant Ecology 2024, 17 (
2
): 0-rtae009. DOI:
10.1093/jpe/rtae009
预出版日期: 2024-02-14
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(
70
)
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(1524KB)(
25
)
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植物间的相互作用已成为评估濒危植物适应能力的研究热点,但其潜在的分子基础仍不清晰。本研究对比分析了浇灌灯台树(
Cornusβcontroversa
)叶水提物(0.025 gβmL
-1
)和枝水提物(0.1 gβmL
-1
)后,珙桐(
Davidiaβinvolucrata
)幼苗的形态、生物量、
DiSOC1-b
和
DiCCoAOMT1
基因表达量的差异。结果表明:灯台树叶水提物显著抑制珙桐幼苗形态和生物量的积累,而枝水提物显著促进珙桐幼苗形态和生物量的积累。此外,灯台树叶水提物处理后
DiSOC1-b
基因表达显著下调,
DiCCoAOMT1
基因表达显著上调。而灯台树枝水提物处理后,
DiSOC1-b
基因在珙桐叶和茎中表达显著上调,
DiCCoAOMT1
基因在珙桐根中的表达显著下调。
DiSOC1-b
表达量与珙桐幼苗大部分形态性状和总生物量呈正相关(
P
< 0.05),
DiCCoAOMT1
表达量与大部分形态性状呈负相关(
P
< 0.05)。上述结果表明,灯台树叶、枝水提物具有相反的化感效应,并影响珙桐幼苗生长相关基因(
DiSOC1-b
)和环境适应性相关基因(
DiCCoAOMT1
)的表达水平。
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20.
抗草甘膦转基因油菜和野芥菜回交1代子2代-子6代在无除草剂选择压下的适合度
Lei Huang, Zi-Cheng Shao, Ling-Ling Dai, Ai-Qin Zheng, Qing-Ling Zhang, Xiao-Lei Wang, Sheng Qiang, Xiao-Ling Song
Journal of Plant Ecology 2024, 17 (
1
): 0-rtad030. DOI:
10.1093/jpe/rtad030
预出版日期: 2023-11-11
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(
45
)
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16
)
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抗草甘膦转基因油菜和野芥菜回交1代子2代-子6代在无除草剂选择压下的适合度转基因作物的抗性基因能否成功渗入野生或近缘杂草取决于携带转基因回交后代的适合度。为深入了解转基因油菜(
Brassica napus
)向野芥菜(wild
B. juncea
)基因流动的生态风险,本文研究了在低密度(5 株/m
2
)和高密度(10 株/m
2
)下,以及单种和混合种植(野芥菜:BC
1
F
2
R-BC
1
F
6
R = 1:1)下抗草甘膦转基因油菜与野芥菜回交1代子2代到子6代(BC
1
F
2
R-BC
1
F
6
R)的适合度;并分析回交后代的适合度成分、种植密度和种植方式之间的相关性。研究结果表明:在单种低密度下,与野芥菜相比,回交1代子2代(BC
1
F
2
R)和子3代(BC
1
F
3
R)具有较低的适合度,而回交1代子4代-子6代(BC
1
F
4
R-BC
1
F
6
R)具有较高的适合度;无论是单种还是混种,高密度下所有回交后代的适合度均低于野芥菜。相关性分析结果显示,种植密度和种植方式对回交后代(BC
1
F
2
R-BC
1
F
6
R)的适合度成分有显著影响。这些结果表明,转基因从栽培油菜渗入到野芥菜很大程度上取决于回交后代的特定生长环境。
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21.
IbNIEL-mediated degradation of IbNAC087 regulates jasmonic acid-dependent salt and drought tolerance in sweet potato
Xu Li, Zhen Wang, Sifan Sun, Zhuoru Dai, Jun Zhang, Wenbin Wang, Kui Peng, Wenhao Geng, Shuanghong Xia, Qingchang Liu, Hong Zhai, Shaopei Gao, Ning Zhao, Feng Tian, Huan Zhang and Shaozhen He
J Integr Plant Biol 2024, 66 (
2
): 176-195. DOI:
10.1111/jipb.13612
发布日期: 2024-01-31
预出版日期: 2024-01-31
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87
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Sweet potato (
Ipomoea batatas
[L.] Lam.) is a crucial staple and bioenergy crop. Its abiotic stress tolerance holds significant importance in fully utilizing marginal lands. Transcriptional processes regulate abiotic stress responses, yet the molecular regulatory mechanisms in sweet potato remain unclear. In this study, a NAC (NAM, ATAF1/2, and CUC2) transcription factor,
IbNAC087
, was identified, which is commonly upregulated in salt- and drought-tolerant germplasms. Overexpression of
IbNAC087
increased salt and drought tolerance by increasing jasmonic acid (JA) accumulation and activating reactive oxygen species (ROS) scavenging, whereas silencing this gene resulted in opposite phenotypes. JA-rich
IbNAC087
-OE (overexpression) plants exhibited more stomatal closure than wild-type (WT) and
IbNAC087
-Ri plants under NaCl, polyethylene glycol, and methyl jasmonate treatments. IbNAC087 functions as a nuclear transcriptional activator and directly activates the expression of the key JA biosynthesis-related genes
lipoxygenase
(
IbLOX
) and
allene oxide synthase
(
IbAOS
). Moreover, IbNAC087 physically interacted with a RING-type E3 ubiquitin ligase NAC087-INTERACTING E3 LIGASE (IbNIEL), negatively regulating salt and drought tolerance in sweet potato. IbNIEL ubiquitinated IbNAC087 to promote 26S proteasome degradation, which weakened its activation on
IbLOX
and
IbAOS
. The findings provide insights into the mechanism underlying the IbNIEL-IbNAC087 module regulation of JA-dependent salt and drought response in sweet potato and provide candidate genes for improving abiotic stress tolerance in crops.
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22.
复合非生物胁迫下丛枝菌根真菌对玉米碳同化和生态化学计量的影响
Qiong Ran, Songlin Zhang, Muhammad Arif, Xueting Yin, Shanshan Chen, Guangqian Ren
Journal of Plant Ecology 2024, 17 (
2
): 0-rtae010. DOI:
10.1093/jpe/rtae010
预出版日期: 2024-02-23
摘要
(
113
)
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(1371KB)(
25
)
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丛枝菌根真菌(arbuscular mycorrhizal fungi, AMF)能够提高植物对非生物胁迫(如盐碱)的耐受性,并改善作物产量。然而,这种影响是不稳定的,导致这种变异的原因仍不清楚。本研究旨在评估干旱如何改变AMF对植物抵抗高钙盐胁迫的影响,采用盆栽实验探究AMF接种如何影响玉米在高钙胁迫和两种水分条件下的生长、光合、养分吸收以及C:N:P化学计量比。结果显示,高钙胁迫显著降低了菌根侵染率、生物量积累、C同化速率以及植物组织中的C:N化学计量比。此外,干旱进一步加剧了钙胁迫对光合作用的抑制。在干旱和钙盐胁迫下,AMF接种在很大程度上缓解了这些负面效应。然而,在充足灌溉条件下,当受到高钙胁迫时,AMF几乎不影响玉米的生长。此外,水分影响了AMF对植物组织中养分分配的调控。在充足水分条件下,AMF刺激了根部的P积累和植物生长,但未造成叶片P与C/N比的增长,导致在高钙胁迫下叶片C:P和N:P增加。相反,在干旱条件下,AMF降低了叶片N含量和N:P比。总体而言,AMF通过增强光合作用和调节养分化学计量,提高了玉米对钙盐的抵抗力,这种效应在水分亏缺条件下更为显著。该研究结果强调AMF在复合胁迫下碳同化和养分稳态调控中的调节作用,并为在盐碱和干旱地区作物产量提升提供了科学依据。
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23.
Orchestrating seed storage protein and starch accumulation toward overcoming yield–quality trade-off in cereal crops
Shuanghe Cao, Bingyan Liu, Daowen Wang, Awais Rasheed, Lina Xie, Xianchun Xia and Zhonghu He
J Integr Plant Biol 2024, 66 (
3
): 468-483. DOI:
10.1111/jipb.13633
发布日期: 2024-02-26
预出版日期: 2024-02-26
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106
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Achieving high yield and good quality in crops is essential for human food security and health. However, there is usually disharmony between yield and quality. Seed storage protein (SSP) and starch, the predominant components in cereal grains, determine yield and quality, and their coupled synthesis causes a yield–quality trade-off. Therefore, dissection of the underlying regulatory mechanism facilitates simultaneous improvement of yield and quality. Here, we summarize current findings about the synergistic molecular machinery underpinning SSP and starch synthesis in the leading staple cereal crops, including maize, rice and wheat. We further evaluate the functional conservation and differentiation of key regulators and specify feasible research approaches to identify additional regulators and expand insights. We also present major strategies to leverage resultant information for simultaneous improvement of yield and quality by molecular breeding. Finally, future perspectives on major challenges are proposed.
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24.
OsWRKY78 regulates panicle exsertion via gibberellin signaling pathway in rice
Enyang Mei, Mingliang He, Min Xu, Jiaqi Tang, Jiali Liu, Yingxiang Liu, Zhipeng Hong, Xiufeng Li, Zhenyu Wang, Qingjie Guan, Xiaojie Tian and Qingyun Bu
J Integr Plant Biol 2024, 66 (
4
): 771-786. DOI:
10.1111/jipb.13636
发布日期: 2024-03-12
预出版日期: 2024-03-12
摘要
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232
)
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Panicle exsertion is one of the crucial agronomic traits in rice (
Oryza sativa
). Shortening of panicle exsertion often leads to panicle enclosure and severely reduces seed production. Gibberellin (GA) plays important roles in regulating panicle exsertion. However, the underlying mechanism and the relative regulatory network remain elusive. Here, we characterized the
oswrky78
mutant showing severe panicle enclosure, and found that the defect of
oswrky78
is caused by decreased bioactive GA contents. Biochemical analysis demonstrates that OsWRKY78 can directly activate GA biosynthesis and indirectly suppress GA metabolism. Moreover, we found OsWRKY78 can interact with and be phosphorylated by mitogen-activated protein kinase (MAPK) kinase OsMAPK6, and this phosphorylation can enhance OsWRKY78 stability and is necessary for its biological function. Taken together, these results not only reveal the critical function of OsWRKY78, but also reveal its mechanism via mediating crosstalk between MAPK and the GA signaling pathway in regulating panicle exsertion.
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25.
低磷环境下宿主植物的丛枝菌根状态影响其后代的表型和转录组表达
Shijun Liu, Jing Xu, Hong Huang, Jianjun Tang, Xin Chen
Journal of Plant Ecology 2024, 17 (
2
): 0-rtae014. DOI:
10.1093/jpe/rtae014
发布日期: 2024-03-15
预出版日期: 2024-03-04
摘要
(
52
)
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(4344KB)(
37
)
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丛枝菌根真菌 (arbuscular mycorrhizal fungi, AMF)对于宿主植物的影响已有较多研究,但AMF对于亲代植物的效应能否影响后代表现的问题仍不明晰。我们设计了一个同质园实验来探究亲代宿主植物蒺藜苜蓿(
Medicago truncatula
)的AMF状态是否影响其后代的表型和转录组表达。来源于4 种亲本处理(低磷不接种 AMF,低磷接种AMF,高磷不接种AMF和高磷接种AMF)的种子分别种植于低磷土壤(LPS)以及正常磷土壤(OHS)。结果表明,低磷后代的开花模式与它们的亲代类似,即OHS环境下接种AMF的植株开花时间要早于不接种AMF的植株,但是在LPS环境下情况相反。转录组差异分析结果显示,一部分差异转录本(包括45个低磷亲本处理中表达的差异转录本和3个高磷亲本处理中表达的差异转录本)在后代间的表达模式相似,即仅受亲代AMF状态影响而不受后代生长环境磷水平影响。其余差异转录本(包括146个低磷亲本处理中表达的差异转录本和2个高磷亲本处理中表达的差异转录本),受亲代AMF状态和后代生长环境磷水平的共同影响。同时,高磷亲本处理的后代差异转录本的数目远少于低磷亲本处理。以上结果表明,AMF可能不仅影响宿主植物当代的表现,还可能影响它们的后代,尤其是在亲代经历胁迫环境的情况下。
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26.
氮添加通过调节化感作用增强本地植物群落对加拿大一枝黄花入侵的抵抗
Jing-Fang Cai, Kai Sun, Lin Li, Si-Ha A, Yi-Luan Shen, Hong-Li Li
Journal of Plant Ecology 2024, 17 (
2
): 0-rtae015. DOI:
10.1093/jpe/rtae015
发布日期: 2024-03-15
预出版日期: 2024-03-07
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(
69
)
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(1161KB)(
38
)
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化感作用在入侵植物和本地植物的相互作用中起着重要作用。氮沉降已成为一个全球性问题,但目前尚不清楚氮添加是否调节入侵植物和本地植物的化感作用来影响它们之间的相互作用。本研究通过温室实验,设置入侵植物加拿大一枝黄花(Solidago canadensis)在两种入侵水平下(入侵与未入侵)定植本地植物群落,并同时交叉设置两种化感作用水平处理(添加或不添加活性炭)和两种氮添加水平处理(添加或不添加)。本地植物群落由8种常与加拿大一枝黄花共生的草本植物组成。研究结果表明,加拿大一枝黄花和本地植物群落的化感作用对自身的生长都有显著的积极影响,而相比于未被入侵的本地植物,氮添加对被入侵的本地植物的积极影响更明显。此外,氮添加还改变了本地植物的化感作用。具体表现为,氮添加提高了被入侵时本地植物的化感作用,但降低了未被入侵时本地植物的化感作用。虽然氮添加对加拿大一枝黄花的生长无显著影响,但降低了其化感作用。这些结果表明,氮添加可以通过提高本地植物的化感作用和降低加拿大一枝黄花的化感作用来提高本地植物对加拿大一枝黄花入侵的抵抗能力。本研究结果为管理和控制加拿大一枝黄花的入侵提供了科学依据。
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27.
The RING zinc finger protein LbRZF1 promotes salt gland development and salt tolerance in
Limonium bicolor
Zongran Yang, Ziwei Zhang, Ziqi Qiao, Xueying Guo, Yixuan Wen, Yingxue Zhou, Chunliang Yao, Hai Fan, Baoshan Wang and Guoliang Han
J Integr Plant Biol 2024, 66 (
4
): 787-809. DOI:
10.1111/jipb.13641
发布日期: 2024-03-13
预出版日期: 2024-03-13
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85
)
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The recretohalophyte
Limonium bicolor
thrives in high-salinity environments because salt glands on the above-ground parts of the plant help to expel excess salt. Here, we characterize a nucleus-localized C3HC4 (RING-HC)-type zinc finger protein of
L. bicolor
named
R
ING
Z
INC
F
INGER PROTEIN
1
(
LbRZF1
).
LbRZF1
was expressed in salt glands and in response to NaCl treatment. LbRZF1 showed no E3 ubiquitin ligase activity. The phenotypes of overexpression and knockout lines for
LbRZF1
indicated that
LbRZF1
positively regulated salt gland development and salt tolerance in
L. bicolor
.
lbrzf1
mutants had fewer salt glands and secreted less salt than did the wild-type, whereas
LbRZF1
-overexpressing lines had opposite phenotypes, in keeping with the overall salt tolerance of these plants. A yeast two-hybrid screen revealed that LbRZF1 interacted with LbCATALASE2 (LbCAT2) and the transcription factor LbMYB113, leading to their stabilization. Silencing of
LbCAT2
or
LbMYB113
decreased salt gland density and salt tolerance. The heterologous expression of
LbRZF1
in
Arabidopsis thaliana
conferred salt tolerance to this non-halophyte. We also identified the transcription factor LbMYB48 as an upstream regulator of
LbRZF1
transcription. The study of LbRZF1 in the regulation network of salt gland development also provides a good foundation for transforming crops and improving their salt resistance.
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28.
Potassium transporter OsHAK9 regulates seed germination under salt stress by preventing gibberellin degradation through mediating
OsGA2ox7
in rice
Peng Zeng, Ting Xie, Jiaxin Shen, Taokai Liang, Lu Yin, Kexin Liu, Ying He, Mingming Chen, Haijuan Tang, Sunlu Chen, Sergey Shabala, Hongsheng Zhang and Jinping Cheng
J Integr Plant Biol 2024, 66 (
4
): 731-748. DOI:
10.1111/jipb.13642
发布日期: 2024-03-14
预出版日期: 2024-03-14
摘要
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132
)
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Soil salinity has a major impact on rice seed germination, severely limiting rice production. Herein, a rice
germination defective
mutant under
salt stress
(
gdss
) was identified by using chemical mutagenesis. The
GDSS
gene was detected via MutMap and shown to encode potassium transporter OsHAK9. Phenotypic analysis of complementation and mutant lines demonstrated that
OsHAK9
was an essential regulator responsible for seed germination under salt stress.
OsHAK9
is highly expressed in germinating seed embryos. Ion contents and non-invasive micro-test technology results showed that OsHAK9 restricted K
+
efflux in salt-exposed germinating seeds for the balance of K
+
/Na
+
. Disruption of
OsHAK9
significantly reduced gibberellin 4 (GA
4
) levels, and the germination defective phenotype of
oshak9a
was partly rescued by exogenous GA
3
treatment under salt stress. RNA sequencing (RNA-seq) and real-time quantitative polymerase chain reaction analysis demonstrated that the disruption of
OsHAK9
improved the GA-deactivated gene
OsGA2ox7
expression in germinating seeds under salt stress, and the expression of
OsGA2ox7
was significantly inhibited by salt stress. Null mutants of
OsGA2ox7
created using clustered, regularly interspaced, short palindromic repeat (CRISPR)/CRISPR-associated nuclease 9 approach displayed a dramatically increased seed germination ability under salt stress. Overall, our results highlight that
OsHAK9
regulates seed germination performance under salt stress involving preventing GA degradation by mediating
OsGA2ox7
, which provides a novel clue about the relationship between GA and
OsHAKs
in rice.
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29.
FKF1b
controls reproductive transition associated with adaptation to geographical distribution in maize
Suhui Chen, Shan Gao, Dongyang Wang, Jie Liu, Yingying Ren, Zhihan Wang, Xin Wei, Qin Wang and Xuehui Huang
J Integr Plant Biol 2024, 66 (
5
): 943-955. DOI:
10.1111/jipb.13639
发布日期: 2024-03-19
预出版日期: 2024-03-19
摘要
(
93
)
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Maize (
Zea mays
subspecies
mays
) is an important commercial crop across the world, and its flowering time is closely related to grain yield, plant cycle and latitude adaptation.
FKF1
is an essential clock-regulated blue-light receptor with distinct functions on flowering time in plants, and its function in maize remains unclear. In this study, we identified two
FKF1
homologs in the maize genome, named
ZmFKF1a
and
ZmFKF1b
, and indicated that ZmFKF1a and ZmFKF1b independently regulate reproductive transition through interacting with ZmCONZ1 and ZmGI1 to increase the transcription levels of
ZmCONZ1
and
ZCN8
. We demonstrated that
ZmFKF1b
underwent artificial selection during modern breeding in China probably due to its role in geographical adaptation. Furthermore, our data suggested that
ZmFKF1b
Hap_C7
may be an elite allele, which increases the abundance of Zm
CONZ1
mRNA more efficiently and adapt to a wider range of temperature zone than that of
ZmFKF1b
Hap_Z58
to promote maize floral transition. It extends our understanding of the genetic diversity of maize flowering. This allele is expected to be introduced into tropical maize germplasm to enrich breeding resources and may improve the adaptability of maize at different climate zones, especially at temperate region.
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30.
地下生物量对湿地土壤碳库的贡献大于地上生物量:一项基于全球湿地的调查
Yueyan Pan, Jiakai Liu, Mingxiang Zhang, Peisheng Huang, Matt Hipesy, Liyi Dai, Ziwen Ma, Fan Zhang, Zhenming Zhang
Journal of Plant Ecology 2024, 17 (
5
): 1-12. DOI:
10.1093/jpe/rtae017
发布日期: 2024-03-23
预出版日期: 2024-03-18
摘要
(
89
)
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)
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湿地植物生物量对环境因素高度敏感,在土壤有机碳(SOC)库的动态中起着至关重要的作用。本研究中,我们收集并分析了1980至2021年全球湿地植物生物量数据。通过检查182篇已发表的湿地生态系统论文中的1134个观测结果,我们创建了湿地植物地上生物量(AGB)和地下生物量(BGB)的综合数据库。我们利用该数据库分析了全球不同气候带、湿地类型和植物物种的生物量特征。在此基础上,我们分析了不同植物物种生物量的差异以及AGB和BGB与有机碳的联系。我们的研究表明,湿地植物AGB在赤道地区较高,但BGB在极地地区最高,在干旱和赤道地区最低。对于植物种类来说,禾本科植物的BGB高于AGB,但石竹目、莎草目和唇形科的AGB较高。此外,我们的研究结果还发现,与AGB相比,BGB在对有机碳库的贡献方面发挥着更重要的作用。值得注意的是,当BGB小于1 t C ha
−1
时,即使生物量发生微小变化也会对有机碳库产生重大影响。我们观察到,当BGB含量较低时,SOC增加了5.7 t C ha
−1
,这表明SOC对生物量的变化在这种情况下更加敏感。我们的研究为湿地植物地上和地下生物量对有机碳的全球响应提供了基础。
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31.
热带次生林转化为单一橡胶林对土壤水文过程的影响
Qiaoyan Chen, Ruiyu Fu, Siyuan Cheng, Dong Qiao, Zhongmin Hu, Zijia Zhang, Licong Dai
Journal of Plant Ecology 2024, 17 (
2
): 0-rtae021. DOI:
10.1093/jpe/rtae021
发布日期: 2024-03-28
预出版日期: 2024-03-26
摘要
(
55
)
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(5387KB)(
19
)
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全球经济快速增长背景下,热带地区橡胶种植面积大幅增加,导致土壤质量退化,从而改变了土壤水文过程。然而,目前关于天然热带雨林转化为橡胶林对土壤持水特性和土壤水分入渗过程的影响仍不清楚。基于此,本文以海南热带次生林和橡胶林为研究对象,通过测定两种林分土壤理化属性和水文特性,旨在探究热带次生林转化为橡胶林对土壤水文过程影响及其调控机制。研究结果表明,热带次生林表层土壤(0-20 cm)的持水能力高于橡胶林,但深层土壤(20-60 cm)的持水能力低于橡胶林。其次,两种林分土壤入渗速率均随入渗时间的延长而显著降低,且热带次生林土壤稳定入渗率高于橡胶林。此外,天然次生林转化为橡胶林改变了土壤理化属性,热带次生林表层土壤(0-20 cm)毛管孔隙度和总孔隙度高于橡胶林,而热带次生林表层土壤容重低于橡胶林,在深层土壤中则相反。总体而言,两种林分土壤持水能力主要受土壤毛管孔隙度影响,可以解释土壤持水能力总变异的31.56%,其次是土壤总孔隙度(26.57%)和土壤容重(26.47%),而土壤机械组成对土壤持水能力的影响较弱。上述研究结果表明,热带次生林转化为橡胶种植园会降低表层土壤持水能力和土壤入渗速率,更容易遭受土壤侵蚀。
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32.
RACK1A promotes hypocotyl elongation by scaffolding light signaling components in
Arabidopsis
Yajuan Fu, Wei Zhu, Yeling Zhou, Yujing Su, Zhiyong Li, Dayan Zhang, Dong Zhang, Jinyu Shen and Jiansheng Liang
J Integr Plant Biol 2024, 66 (
5
): 956-972. DOI:
10.1111/jipb.13651
发布日期: 2024-04-01
预出版日期: 2024-04-01
摘要
(
84
)
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英文版
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Plants deploy versatile scaffold proteins to intricately modulate complex cell signaling. Among these, RACK1A (Receptors for Activated C Kinase 1A) stands out as a multifaceted scaffold protein functioning as a central integrative hub for diverse signaling pathways. However, the precise mechanisms by which RACK1A orchestrates signal transduction to optimize seedling development remain largely unclear. Here, we demonstrate that RACK1A facilitates hypocotyl elongation by functioning as a flexible platform that connects multiple key components of light signaling pathways. RACK1A interacts with PHYTOCHROME INTERACTING FACTOR (PIF)3, enhances PIF3 binding to the promoter of
BBX11
and down-regulates its transcription. Furthermore, RACK1A associates with ELONGATED HYPOCOTYL 5 (HY5) to repress HY5 biochemical activity toward target genes, ultimately contributing to hypocotyl elongation. In darkness, RACK1A is targeted by CONSTITUTIVELY PHOTOMORPHOGENIC (COP)1 upon phosphorylation and subjected to COP1-mediated degradation via the 26?S proteasome system. Our findings provide new insights into how plants utilize scaffold proteins to regulate hypocotyl elongation, ensuring proper skoto- and photo-morphogenic development.
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33.
Dense infraspecific sampling reveals cryptic differentiation in the enigmatic hemiparasitic love vine
Cassytha filiformis
(Lauraceae)
Zhi-Fang Liu, Shi-Fang Zhang, Alex D. Twyford, Xiu-Qin Ci, Lang Li, Xiao-Yan Zhang, Jian-Lin Hu, Jia-Chuan Tan, Guang-Da Tang, Sheng-Yuan Qin, Ling Hu, Xin Ding, Hong-Hu Meng, Li-Na Dong, Ting Huang, Hui Ma, Jian-Hua Xiao, Chao-Nan Cai, John G. Conran, Qi Wang, Peter M. Hollingsworth, and Jie Li
Journal of Systematics and Evolution 2024, 62 (
6
): 1238-1254. DOI:
10.1111/jse.13069
发布日期: 2024-03-31
预出版日期: 2024-03-31
摘要
(
50
)
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英文版
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Species delimitation remains a challenge worldwide, especially in highly diverse tropical and subtropical regions. Here, we use an integrative approach that combines morphology, phylogenomics, and species distribution modeling (SDM) to clarify the cryptic differentiation within the enigmatic hemiparasitic love vine
Cassytha filiformis
(Lauraceae) in China and adjacent regions. We generated complete plastid genomes and nuclear ribosomal sequences for diverse samples from across the species range and compared results with previously published plastid data, recovering two well-supported monophyletic clades. Further, the analysis revealed significant differences in two morphological characters and SDM, indicating distinct environmental factors influencing their distributions. Fossil-calibrated analyses to estimate the origins and diversification patterns for the cryptic species gave divergence age estimates corresponding to the Oligo-Miocene; a period of new ecological opportunities associated with the prevailing East Asian monsoon. Multivariate analyses support the conclusion that southern China and adjacent regions have a different, previously unknown, cryptic lineage of
C. filiformis
. Our study highlights the importance of using multivariate approach to characterize plant species, as well as the significant role that past climatic changes have played in driving speciation in parasitic plants in tropical and subtropical zones.
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34.
植物根系诱导的土壤大孔隙驱动黄河三角洲垂向水文连通
Lumeng Xie, Jiakai Liu, Yi Li, Peisheng Huang, Matt Hipsey, Mingxiang Zhang, Zhenming Zhang
Journal of Plant Ecology 2024, 17 (
5
): 1-12. DOI:
10.1093/jpe/rtae019
发布日期: 2024-04-04
预出版日期: 2024-04-04
摘要
(
62
)
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(2848KB)(
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)
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植物根系诱导的土壤大孔隙及其水文功能是揭示生态-水文相互作用的关键因素,也是区域生态保护和恢复的理论和实践基础,基于土壤水动力学的小尺度水文连通研究能够促进研究者对水文连通内涵的认知。本研究以黄河三角洲为例,基于X射线计算机断层扫描(CT)技术和恒定水头渗透实验,量化了不同植被群落土壤大孔隙特征及垂向水动力过程;利用Hydrus 1-D软件和Green–Ampt模型,估算了该地区均质土壤的垂向水动力特征;通过与入渗实验结果的比较,阐明了土壤大孔隙对土壤垂向水动力过程的影响,进一步揭示该地区的垂向水文连通性。结果表明,黄河三角洲地区土壤结构具有高度的空间异质性,土壤大孔隙体积数刺槐群落>碱蓬群落>柽柳群落,同时土壤大孔隙体积随土壤深度的增加而降低;土壤饱和导水率(Ks)与土壤容重(BD)呈负相关,与土壤大孔隙体积(V)、土壤通气量(SA)和最大持水量(MWC)呈正相关;土壤大孔隙体积能够显著提高土壤饱和导水率,促进水分快速运动。本研究所探讨的小尺度“植被-土壤-水文”协同作用机制,将为湿地垂向水文连通的恢复提供理论指导。
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35.
CsRAXs
negatively regulate leaf size and fruiting ability through auxin glycosylation in cucumber
Jiacai Chen, Liu Liu, Guangxin Chen, Shaoyun Wang, Ye Liu, Zeqin Zhang, Hongfei Li, Liming Wang, Zhaoyang Zhou, Jianyu Zhao and Xiaolan Zhang
J Integr Plant Biol 2024, 66 (
5
): 1024-1037. DOI:
10.1111/jipb.13655
发布日期: 2024-04-05
预出版日期: 2024-04-05
摘要
(
111
)
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Leaves are the main photosynthesis organ that directly determines crop yield and biomass. Dissecting the regulatory mechanism of leaf development is crucial for food security and ecosystem turn-over. Here, we identified the novel function of R2R3-MYB transcription factors
CsRAXs
in regulating cucumber leaf size and fruiting ability.
Csrax5
single mutant exhibited enlarged leaf size and stem diameter, and
Csrax1/2/5
triple mutant displayed further enlargement phenotype. Overexpression of
CsRAX1
or
CsRAX5
gave rise to smaller leaf and thinner stem. The fruiting ability of
Csrax1/2/5
plants was significantly enhanced, while that of
CsRAX5
overexpression lines was greatly weakened. Similarly, cell number and free auxin level were elevated in mutant plants while decreased in overexpression lines. Biochemical data indicated that
CsRAX1/5
directly promoted the expression of auxin glucosyltransferase gene
CsUGT74E2
. Therefore, our data suggested that
CsRAXs
function as repressors for leaf size development by promoting auxin glycosylation to decrease free auxin level and cell division in cucumber. Our findings provide new gene targets for cucumber breeding with increased leaf size and crop yield.
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36.
The miR159a-
DUO1
module regulates pollen development by modulating auxin biosynthesis and starch metabolism in citrus
Yanhui Xu, Wenxiu Tian, Minqiang Yin, Zhenmei Cai, Li Zhang, Deyi Yuan, Hualin Yi, Juxun Wu
J Integr Plant Biol 2024, 66 (
7
): 1351-1369. DOI:
10.1111/jipb.13656
发布日期: 2024-04-05
预出版日期: 2024-04-05
摘要
(
152
)
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Achieving seedlessness in citrus varieties is one of the important objectives of citrus breeding. Male sterility associated with abnormal pollen development is an important factor in seedlessness. However, our understanding of the regulatory mechanism underlying the seedlessness phenotype in citrus is still limited. Here, we determined that the miR159a-
DUO1
module played an important role in regulating pollen development in citrus, which further indirectly modulated seed development and fruit size. Both the overexpression of csi-miR159a and the knocking out of
DUO1
in Hong Kong kumquat (
Fortunella hindsii
) resulted in small and seedless fruit phenotypes. Moreover, pollen was severely aborted in both transgenic lines, with arrested pollen mitotic I and abnormal pollen starch metabolism. Through additional cross-pollination experiments,
DUO1
was proven to be the key target gene for miR159a to regulate male sterility in citrus. Based on DNA affinity purification sequencing (DAP-seq), RNA-seq, and verified interaction assays,
YUC2/YUC6
,
SS4
and
STP8
were identified as downstream target genes of
DUO1
, those were all positively regulated by
DUO1
. In transgenic
F. hindsii
lines, the miR159a-
DUO1
module down-regulated the expression of
YUC2
/
YUC6
, which decreased indoleacetic acid (IAA) levels and modulated auxin signaling to repress pollen mitotic I. The miR159a-
DUO1
module reduced the expression of the starch synthesis gene
SS4
and sugar transport gene
STP8
to disrupt starch metabolism in pollen. Overall, this work reveals a new mechanism by which the miR159a-
DUO1
module regulates pollen development and elucidates the molecular regulatory network underlying male sterility in citrus.
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37.
Knockout of
miR396
genes increases seed size and yield in soybean
Hongtao Xie, Fei Su, Qingfeng Niu, Leping Geng, Xuesong Cao, Minglei Song, Jinsong Dong, Zai Zheng, Rui Guo, Yang Zhang, Yuanwei Deng, Zhanbo Ji, Kang Pang, Jian-Kang Zhu and Jianhua Zhu
J Integr Plant Biol 2024, 66 (
6
): 1148-1157. DOI:
10.1111/jipb.13660
发布日期: 2024-04-10
预出版日期: 2024-04-10
摘要
(
166
)
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Yield improvement has long been an important task for soybean breeding in the world in order to meet the increasing demand for food and animal feed.
miR396
genes have been shown to negatively regulate grain size in rice, but whether
miR396
family members may function in a similar manner in soybean is unknown. Here, we generated eight soybean mutants harboring different combinations of homozygous mutations in the six soybean
miR396
genes through genome editing with clustered regularly interspaced palindromic repeats (CRISPR)/CRISPR-associated nuclease (Cas) 12SF01 in the elite soybean cultivar Zhonghuang 302 (ZH302). Four triple mutants (
mir396aci
,
mir396acd
,
mir396adf
, and
mir396cdf
), two quadruple mutants (
mir396-abcd
and
mir396acfi
), and two quintuple mutants (
mir396abcdf
and
mir396bcdfi
) were characterized. We found that plants of all the
mir396
mutants produced larger seeds compared to ZH302 plants. Field tests showed that
mir396adf
and
mir396cdf
plants have significantly increased yield in growth zones with relatively high latitude which are suited for ZH302 and moderately increased yield in lower latitude. In contrast,
mir396abcdf
and mir396bcdfi plants have increased plant height and decreased yield in growth zones with relatively high latitude due to lodging issues, but they are suited for low latitude growth zones with increased yield without lodging problems. Taken together, our study demonstrated that loss-of-function of
miR396
genes leads to significantly enlarged seed size and increased yield in soybean, providing valuable germplasms for breeding high-yield soybean.
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38.
AtVQ25 promotes salicylic acid-related leaf senescence by fine-tuning the self-repression of
AtWRKY53
Qi Tan, Mingming Zhao, Jingwei Gao, Ke Li, Mengwei Zhang, Yunjia Li, Zeting Liu, Yujia Song, Xiaoyue Lu, Zhengge Zhu, Rongcheng Lin, Pengcheng Yin, Chunjiang Zhou and Geng Wang
J Integr Plant Biol 2024, 66 (
6
): 1126-1147. DOI:
10.1111/jipb.13659
发布日期: 2024-04-17
预出版日期: 2024-04-17
摘要
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137
)
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Most mechanistic details of chronologically ordered regulation of leaf senescence are unknown. Regulatory networks centered on AtWRKY53 are crucial for orchestrating and integrating various senescence-related signals. Notably, AtWRKY53 binds to its own promoter and represses transcription of
AtWRKY53
, but the biological significance and mechanism underlying this self-repression remain unclear. In this study, we identified the VQ motif-containing protein AtVQ25 as a cooperator of AtWRKY53. The expression level of
AtVQ25
peaked at mature stage and was specifically repressed after the onset of leaf senescence. AtVQ25-overexpressing plants and
atvq25
mutants displayed precocious and delayed leaf senescence, respectively. Importantly, we identified AtWRKY53 as an interacting partner of AtVQ25. We determined that interaction between AtVQ25 and AtWRKY53 prevented AtWRKY53 from binding to W-box elements on the
AtWRKY53
promoter and thus counteracted the self-repression of
AtWRKY53
. In addition, our RNA-sequencing data revealed that the AtVQ25-AtWRKY53 module is related to the salicylic acid (SA) pathway. Precocious leaf senescence and SA-induced leaf senescence in
AtVQ25
-overexpressing lines were inhibited by an SA pathway mutant,
atsid2
, and
NahG
transgenic plants;
AtVQ25
-overexpressing/
atwrky53
plants were also insensitive to SA-induced leaf senescence. Collectively, we demonstrated that AtVQ25 directly attenuates the self-repression of
AtWRKY53
during the onset of leaf senescence, which is substantially helpful for understanding the timing of leaf senescence onset modulated by AtWRKY53.
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39.
OsATL32 ubiquitinates the reactive oxygen species-producing OsRac5–OsRbohB module to suppress rice immunity
Yuqing Yan, Hui Wang, Yan Bi, Jiajing Wang, Muhammad Noman, Dayong Li, Fengming Song
J Integr Plant Biol 2024, 66 (
7
): 1459-1480. DOI:
10.1111/jipb.13666
发布日期: 2024-04-17
预出版日期: 2024-04-17
摘要
(
140
)
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Ubiquitination-mediated protein degradation is integral to plant immunity, with E3 ubiquitin ligases acting as key factors in this process. Here, we report the functions of OsATL32, a plasma membrane-localized Arabidopsis Tóxicos En Levadura (ATL)-type E3 ubiquitin ligase, in rice (
Oryza sativa
) immunity and its associated regulatory network. We found that the expression of OsATL32 is downregulated in both compatible and incompatible interactions between rice and the rice blast fungus
Magnaporthe oryzae
. The OsATL32 protein level declines in response to infection by a compatible
M. oryzae
strain or to chitin treatment. OsATL32 negatively regulates rice resistance to blast and bacterial leaf blight diseases, as well as chitin-triggered immunity. Biochemical and genetic studies revealed that OsATL32 suppresses pathogen-induced reactive oxygen species (ROS) accumulation by mediating ubiquitination and degradation of the ROS- producing OsRac5–OsRbohB module, which enhances rice immunity against
M. oryzae
. The protein phosphatase PHOSPHATASE AND TENSIN HOMOLOG enhances rice blast resistance by dephosphorylating OsATL32 and promoting its degradation, preventing its negative effect on rice immunity. This study provides insights into the molecular mechanism by which the E3 ligase OsATL32 targets a ROS-producing module to undermine rice immunity.
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40.
Genetic diversity and evolution of the plastome in allotetraploid cotton (
Gossypium
spp.)
Xin-Lin Yan, Sheng-Long Kan, Mei-Xia Wang, Yong-Yao Li, Luke R. Tembrock, Wen-Chuang He, Li-Yun Nie, Guan-Jing Hu, Dao-Jun Yuan, Xiong-Feng Ma, and Zhi-Qiang Wu
Journal of Systematics and Evolution 2024, 62 (
6
): 1118-1136. DOI:
10.1111/jse.13070
发布日期: 2024-04-16
预出版日期: 2024-04-16
摘要
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49
)
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Cotton (
Gossypium
spp.) is a vital global source of renewable fiber and ranks among the world's most important cash crops. While extensive nuclear genomic data of
Gossypium
has been explored, the organellar genomic resources of allotetraploid cotton, remain largely untapped at the population level. The plastid genome (plastome) is well suited for studying plant species relationships and diversity due to its nonrecombinant uniparental inheritance. Here, we conducted
de novo
assembly of 336
Gossypium
plastomes, mainly from domesticated cultivars, and generated a pan-plastome level resource for population structure and genetic diversity analyses. The assembled plastomes exhibited a typical quadripartite structure and varied in length from 160 103 to 160 597 bp. At the species level, seven allotetraploid species were resolved into three clades, where
Gossypium tomentosum
and
Gossypium mustelinum
formed an early diverging clade rooted by diploids, followed by splitting two sister clades of
Gossypium darwinii
–
Gossypium barbadense
and
Gossypium hirsutum
–
Gossypium ekmanianum
–
Gossypium stephensii
. Within the
G. hirsutum
clade the resolution of cultivated accessions was less polyphyletic with landrace and wild accessions than in
G. barbadense
suggesting some selection on plastome in the domestication of this adaptable species of cotton. The nucleotide diversity of
G. hirsutum
was higher than that of
G. barbadense
. We specifically compared the plastomes of
G. hirsutum
and
G. barbadense
to find mutational hotspots within each species as potential molecular markers. These findings contribute a valuable resource for exploring cotton evolution as well as in the breeding of new cotton cultivars and the preservation of wild and cultivated germplasm.
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