植物研究 ›› 2026, Vol. 46 ›› Issue (4): 666-676.doi: 10.7525/j.issn.1673-5102.2026.04.008
胡咏琪1,2, 张瑞1,2, 张艺森1,2, 宋跃朋1,2(
)
收稿日期:2026-05-01
出版日期:2026-07-20
发布日期:2026-07-22
通讯作者:
宋跃朋
E-mail:Yuepengsong@bjfu.edu.cn
作者简介:胡咏琪(2002—),女,硕士研究生,主要从事杨树基因组及分子育种研究。
基金资助:
Yongqi HU1,2, Rui ZHANG1,2, Yisen ZHANG1,2, Yuepeng SONG1,2(
)
Received:2026-05-01
Online:2026-07-20
Published:2026-07-22
Contact:
Yuepeng SONG
E-mail:Yuepengsong@bjfu.edu.cn
摘要:
液泡膜内在蛋白(tonoplast intrinsic proteins,TIPs)是水通道蛋白家族的重要成员,在植物水分平衡及逆境胁迫响应中发挥关键作用。本研究以PagTIP1;3基因为对象,利用野生型84K杨(Populus alba×P. glandulosa)及其PagTIP1;3敲除株系,解析PagTIP1;3基因在杨树盐胁迫响应中的功能及分子机制。结果表明:正常条件下,PagTIP1;3基因敲除导致植株叶片叶绿素含量降低,净光合速率及株高下降。盐胁迫下,敲除株系萎蔫与黄化症状加剧,株高显著降低;最大光化学效率、电子传递速率及叶绿素相对含量等光合生理指标均显著低于野生型。转录组分析显示,光合作用通路关键基因(PagLHCB7、PagGAPCP-2、PagPSY、PagRCA)在PagTIP1;3敲除株系响应盐胁迫时的表达模式与野生型存在显著差异。综上所述,PagTIP1;3基因缺失可能通过影响盐胁迫下杨树光合作用相关基因的转录响应,损伤光合电子传递与光保护能力,破坏生长及光合生理稳态,从而显著降低杨树的耐盐性。
中图分类号:
胡咏琪, 张瑞, 张艺森, 宋跃朋. PagTIP1;3基因调控84K杨盐胁迫响应的光合生理特性研究[J]. 植物研究, 2026, 46(4): 666-676.
Yongqi HU, Rui ZHANG, Yisen ZHANG, Yuepeng SONG. PagTIP1;3 Regulates Photosynthetic Physiological Characteristics of 84K Poplar in Response to Salt Stress[J]. Bulletin of Botanical Research, 2026, 46(4): 666-676.
表1
引物序列
引物名称 Primer name | 上游引物(5′→3′) Upstream primer(5′→3′) | 下游引物(5′→3′) Downstream primer(5′→3′) |
|---|---|---|
| PagTIP1;3-KO | ACAGCAACAACAGAGCTCCTC | CGAAGGTCACAGCCGGATTC |
| PagLHCB7-qPCR | TCTTTCTTGCAGCGACCGAT | GGGTCAATGGACAGACCCAG |
| PagGAPCP-2-qPCR | TCTTGTTGAAGCTTCCCGCT | CCTGCTGGAATTGAAGTGCC |
| PagPSY-qPCR | TCTCGGATGTCATAGCAGGA | ATTGCCCAGACAGCTCTTCG |
| PagRCA-qPCR | GACAATGTTCCCGAGGACGA | GCTCAAAAGTTGGGGGTCCT |
| Actin | ACACGGGGAGGTAGTGACAA | CCTCCAATGGATCCTCGTTA |
表3
盐胁迫下基因敲除株系与野生型上调差异表达基因的GO功能富集分析
GO编号 GO ID | GO注释 GO description | 基因数量 Gene number | P |
|---|---|---|---|
| GO:0003700 | 序列特异性DNA结合转录因子活性 Transcription factor activity,sequence-specific DNA binding | 32 | 8.92×10-9 |
| GO:0006355 | DNA模板化转录调控 Regulation of transcription,DNA - templated | 45 | 6.75×10-7 |
| GO:0016491 | 氧化还原酶活性 Oxidoreductase activity | 28 | 3.14×10-6 |
| GO:0055114 | 氧化还原过程 Oxidation-reduction process | 51 | 1.89×10-5 |
| GO:0005975 | 碳水化合物代谢过程 Carbohydrate metabolic process | 36 | 4.27×10-5 |
| GO:0019752 | 羧酸代谢过程 Carboxylic acid metabolic process | 29 | 7.53×10-5 |
| GO:0055085 | 跨膜转运 Transmembrane transport | 38 | 9.16×10-5 |
| GO:0043169 | 阳离子结合 Cation binding | 41 | 1.24×10-4 |
| GO:0016209 | 抗氧化活性 Antioxidant activity | 18 | 2.68×10-4 |
| GO:0006412 | 翻译 Translation | 25 | 3.95×10-4 |
表4
盐胁迫下基因敲除株系与野生型下调差异表达基因的GO功能富集分析
GO编号 GO ID | GO注释 GO description | 基因数量 Gene number | P |
|---|---|---|---|
| GO:0001071 | 核酸结合转录因子活性 Nucleic acid binding transcription factor activity | 43 | 7.84×10-8 |
| GO:0006355 | DNA模板化转录调控 Regulation of transcription,DNA-templated | 62 | 5.77×10-5 |
| GO:0003700 | 序列特异性DNA结合转录因子活性 Transcription factor activity,sequence-specific DNA binding | 43 | 7.84×10-8 |
| GO:0004722 | 蛋白丝氨酸/苏氨酸磷酸酶活性 Protein serine/threonine phosphatase activity | 14 | 5.23×10-6 |
| GO:0006470 | 蛋白质去磷酸化 Protein dephosphorylation | 15 | 2.74×10-5 |
| GO:0005984 | 二糖代谢过程 Disaccharide metabolic process | 10 | 6.35×10-7 |
| GO:0016052 | 碳水化合物分解代谢过程 Carbohydrate catabolic process | 11 | 2.39×10-5 |
| GO:0009311 | 寡糖代谢过程 Oligosaccharide metabolic process | 10 | 3.25×10-6 |
| GO:0044723 | 单生物体碳水化合物代谢过程 Single-organism carbohydrate metabolic process | 23 | 1.08×10-5 |
| GO:2000112 | 细胞大分子生物合成过程调控 Regulation of cellular macromolecule biosynthetic process | 62 | 7.83×10-5 |
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