doi:10.7525/j.issn.1673-5102.2022.02.015

Abstract

Abstract:

In order to explore the eco-physiological mechanism of Populus euphratica Oliv adapting to the arid desert environment，P. euphratica Oliv. that the key species in the Tarim desert ecosystem was used as material. It was conducted to research the change of photosynthetic gas exchange， antioxidative enzyme activity and osmoregulation substances of P. euphratica grown at different groundwater depths（GWD）. The results showed that：（1） the diurnal courses of net photosynthetic rate（P_n）， transpiration rate（T_r） and stomatal conductance（G_s） of P. euphratica under different GWD conditions showed the single peak curves respectively， while the diurnal variation of intercellular CO₂ mole fraction（C_i） were the “V” curve， the valley value was significantly reduced at GWD=5.5 m（P<0.01） respectively. P_n and G_s changed synchronously， and the peak value appeared at 12：00， while the T_r peak value lagged 2 hours. The peak values of P_n in different GWD were significantly different（P<0.05）， while the peak values of T_r， G_s and C_i valley were significantly reduced in GWD=5.5 m（P<0.01） respectively. P_n， T_r， G_s， C_i， water-use efficiency（WUE） and light utilization efficiency（LUE） decreased with GWD increasing， and the daily mean value of G_s and LUE significantly decreased at GWD=5.5 m（P<0.05） respectively. However， there was no significant difference in the daily mean values of P_n， T_r， C_i and WUE under different GWD conditions（P>0.05） respectively；（2）The decline of P_n in P. euphratica from 12：00-16：00 was mainly restricted by stomatal factors， while the decline of P_n from 16：00-20：00 was mainly limited by non-stomatal factors；（3）The relationship between eco-physiological factors and P_n， T_r under different GWD conditions were analyzed with correlation， partial correlation and stepwise regression methods， it was found that G_s was the main factor affecting P_n and T_r of P. euphratica respectively. The correlation degree between P_n and photosynthetically active radiation（PAR）， T_r and G_s were enhanced respectively with GWD increasing， indicating that GWD directly regulated the air-water exchange；（4）The malondialdehyde content（MDA）， superoxide dismutase activity（SOD）， peroxidase activity（POD） and free proline content（Pro） were increased respectively with GWD increasing， but the content of soluble protein（SP）， soluble sugar（SS） were both decreased， which indicated that the cell membrane permeability and photosynthetic carbon assimilation were inhibited respectively with GWD increasing. P. euphratica enhanced the protective enzyme activity（POD， SOD） and osmoregulation content（Pro） to cooperate against drought stress caused by GWD increasing， and ensured to maintain the basic normal physiological activities. This was the eco-physiological strategy for P. euphratica to adapt arid desert environment.

Key words: Populus euphratica Oliv., groundwater depth, gas exchange, osmoregulation substances, protective enzyme activity

CLC Number:

S792.11

Yaqi Dai, Yanping Liu, Lu Han, Haizhen Wang. [J]. Bulletin of Botanical Research, 2022, 42(2): 299-308.

References

1	郝兴明，李卫红，陈亚宁.新疆塔里木河下游荒漠河岸（林）植被合理生态水位［J］.植物生态学报，2008，32（4）：838-847.
1	Hao X M，Li W H，Chen Y N.Water table and the desert riparian forest community in the lower reaches of Tarim River，China［J］.Journal of Plant Ecology，2008，32（4）：838-847.
2	Yordanov I，Velikova V，Tsonev T.Plant responses to drought，acclimation，and stress tolerance［J］.Photosynthetica，2000，38（2）：171-186.
3	Pinheiro C，Chaves M M.Photosynthesis and drought：can we make metabolic connections from available data？［J］.Journal of Experimental Botany，2011，62（3）：869-882.
4	Shao H B，Liang Z S，Shao M A.Osmotic regulation of 10 wheat（Triticum aestivum L.） genotypes at soil water deficits［J］.Colloids and Surfaces B：Biointerfaces，2006，47（2）：132-139.
5	Babita M，Maheswari M，Rao L M，et al.Osmotic adjustment，drought tolerance and yield in castor（Ricinus communis L.） hybrids［J］.Environmental and Experimental Botany，2010，69（3）：243-249.
6	Aroca R，Irigoyen J J，Sánchez-Díaz M.Drought enhances maize chilling tolerance：Ⅱ.Photosynthetic traits and protective mechanisms against oxidative stress［J］.Physiologia Plantarum，2003，117（4）：540-549.
7	付爱红，陈亚宁，李卫红.中国黑河下游荒漠河岸林植物群落水分利用策略研究［J］.中国科学：地球科学，2014，44（4）：693-705.
7	Fu A H，Chen Y N，Li W H.Water use strategies of the desert riparian forest plant community in the lower reaches of Heihe River Basin，China［J］.Science China Earth Sciences，2014，57（6）：1293-1305.
8	党亚玲，韩炜，马霄华，等.博斯腾湖北岸不同地下水埋深对塔干柽柳光合特性的影响［J］.生态科学，2017，36（6）：188-194.
8	Dang Y L，Han W，Ma X H，et al.Effects on photosynthetic characteristics of Tamarixchinensis to different groundwater depth on the north shore of Boston Lake［J］.Ecological Science，2017，36（6）：188-194.
9	Romano G，Zia S，Spreer W，et al.Use of thermography for high throughput phenotyping of tropical maize adaptation in water stress［J］.Computers and Electronics in Agriculture，2011，79（1）：67-74.
10	陈敏，陈亚宁，李卫红，等.塔里木河中游地区3种植物的抗旱机理研究［J］.西北植物学报，2007，27（4）：747-754.
10	Chen M，Chen Y N，Li W H，et al.Drought resistance mechanism of three plant species in the middle reaches of Tarim River，China［J］.Acta Botanica Boreali-Occidentalia Sinica，2007，27（4）：747-754.
11	Mathobo R，Marais D，Steyn J M.The effect of drought stress on yield，leaf gaseous exchange and chlorophyll fluorescence of dry beans（Phaseolus vulgaris L.）［J］.Agricultural Water Management，2017，180：118-125.
12	Liao J X，Wang G X.Effects of drought stress on leaf gas exchange and chlorophyll fluorescence of Glycyrrhiza uralensis［J］.Russian Journal of Ecology，2014，45（6）：532-538.
13	郭艳阳，刘佳，朱亚利，等.玉米叶片光合和抗氧化酶活性对干旱胁迫的响应［J］.植物生理学报，2018，54（12）：1839-1846.
13	Guo Y Y，Liu J，Zhu Y L，et al.Responses of photosynthetic and antioxidant enzyme activities in maize leaves to drought stress［J］.Plant Physiology Journal，2018，54（12）：1839-1846.
14	王海珍，韩路，徐雅丽，等.土壤水分梯度对灰胡杨光合作用与抗逆性的影响［J］.生态学报，2017，37（2）：432-442．
14	Wang H Z，Han L，Xu Y L，et al.Effects of soil water gradient on photosynthetic characteristics and stress resistance of Populus pruinosa in the Tarim Basin，China［J］.Acta Ecologica Sinica，2017，37（2）：432-442.
15	陈亚鹏，陈亚宁，徐长春，等.塔里木河下游地下水埋深对胡杨气体交换和叶绿素荧光的影响［J］.生态学报，2011，31（2）：344-353.
15	Chen Y P，Chen Y N，Xu C C，et al.Effects of groundwater depth on the gas exchange and chlorophyll fluorescence of Populus euphratica in the lower reaches of Tarim River［J］.Acta Ecologica Sinica，2011，31（2）：344-353.
16	陈晓林，陈亚鹏，李卫红，等.干旱区不同地下水埋深下胡杨细根空间分布特征［J］.植物科学学报，2018，36（1）：45-53.
16	Chen X L，Chen Y P，Li W H，et al.Spatial distribution characteristics of fine roots of Populus euphratica Oliv.Under different groundwater depths in arid regions［J］.Plant Science Journal，2018，36（1）：45-53.
17	陈亚宁，陈亚鹏，李卫红，等.塔里木河下游胡杨脯氨酸累积对地下水位变化的响应［J］.科学通报，2003，48（9）：958-961.
17	Chen Y N，Chen Y P，Li W H，et al.Response of the accumulation of proline in the bodies of Populus euphratica to the change of groundwater level at the lower reaches of Tarim River［J］.Chinese Science Bulletin，2003，48（18）：1995-1999.
18	吴桂林，蒋少伟，周天河，等.不同地下水埋深胡杨与柽柳幼苗的水分利用策略比较［J］.干旱区研究，2016，33（6）：1209-1216.
18	Wu G L，Jiang S W，Zhou T H，et al.Water use strategies of seedlings of Populus euphratica and Tamarix ramosissima under different groundwater depths［J］.Arid Zone Research，2016，33（6）：1209-1216.
19	王日照，陈亚鹏，陈亚宁，等.地下水埋深对胡杨（Populus euphratica）叶片形态结构和水力导度的影响［J］.中国沙漠，2016，36（5）：1302-1309.
19	Wang R Z，Chen Y P，Chen Y N，et al.Effects of groundwater level on morphological，anatomical structure and leaf hydraulic conductance of Populus euphratica［J］.Journal of Desert Research，2016，36（5）：1302-1309.
20	张青青，徐海量，叶茂，等.不同地下水埋深下胡杨叶片生理指标变化特点［J］.植物研究，2009，29（4）：453-459.
20	Zhang Q Q，Xu H L，Ye M，et al.Variation of physiological indexes of the Populus euphraticn leaves under different groundwater depth［J］.Bulletin of Botanical Research，2009，29（4）：453-459.
21	Farquhar G D，Sharkey T D.Stomatal conductance and photosynthesis［J］.Annual Review of Plant Physiology，1982，33（1）：317-345.
22	高俊凤.植物生理学实验指导［M］.北京：高等教育出版社，2006.
22	Gao J F.Experimental guidance for plant physiology［M］.Beijing：Higher Education Press，2006.
23	Schierenbeck K A，Marshall J D.Seasonal and diurnal patterns of photosynthetic gas exchange for Lonicera sempervirens and L. japonica（Caprifoliaceae）［J］.American Journal of Botany，1993，80（11）：1292-1299.
24	常宗强，冯起，苏永红，等.额济纳绿洲胡杨的光合特征及其对光强和CO₂浓度的响应［J］.干旱区地理，2006，29（4）：496-502.
24	Chang Z Q，Feng Q，Su Y H，et al.Photosynthetic characters of Populus euphratica leaves and response rate to light intensity and CO₂ concentration in Ejina oasis of Northwest China［J］.Arid Land Geography，2006，29（4）：496-502.
25	吴大千，徐飞，郭卫华，等.中国北方城市常见绿化植物夏季气孔导度影响因素及模型比较［J］.生态学报，2007，27（10）：4141-4148.
25	Wu D Q，Xu F，Guo W H，et al.Impact factors and model comparison of summer stomatal conductance of six common greening species in cities of Northern China［J］.Acta Ecologica Sinica，2007，27（10）：4141-4148.
26	许大全.光合作用效率［M］.上海：上海科学技术出版社，2002.
26	Xu D Q.Photosynthetic efficiency［M］.Shanghai：Shanghai Scientific & Technical Publishers，2002.
27	Rouhi V，Samson R，Lemeur R，et al.Photosynthetic gas exchange characteristics in three different almond species during drought stress and subsequent recovery［J］.Environmental and Experimental Botany，2007，59（2）：117-129.
28	Dinakar C，Djilianov D，Bartels D.Photosynthesis in desiccation tolerant plants：energy metabolism and antioxidative stress defense［J］.Plant Science，2012，182：29-41.
29	Bai L P，Sui F G，Ge T D，et al.Effect of soil drought stress on leaf water status，membrane permeability and enzymatic antioxidant system of maize［J］.Pedosphere，2006，16（3）：326-332.
30	De Campos M K F，De Carvalho K，De Souza F S，et al.Drought tolerance and antioxidant enzymatic activity in transgenic ‘Swingle’ citrumelo plants over-accumulating proline［J］.Environmental and Experimental Botany，2011，72（2）：242-250．

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