文献类型：期刊文献

英文题名：Leaf structure and photosynthesis in Populus alba under naturally fluctuating environments

作者：Lin, X. Y.[1,2,3] Wang, X. X.[3] Zeng, Q. Y.[1,2,3] Yang, Q.[3,4]

第一作者：Lin, X. Y.

通信作者：Yang, Q[1];Yang, Q[2]

机构：[1]Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China;[2]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[3]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[4]Zhejiang A&F Univ, Coll Forestry & Biotechnol, State Key Lab Subtrop Silviculture, Hangzhou 311300, Zhejiang, Peoples R China

年份：2022

卷号：60

期号：2

起止页码：240-250

外文期刊名：PHOTOSYNTHETICA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000787537200001)】；

基金：samples Y (NA) acceptor-side Y (ND) Acknowledgments: The authors acknowledge the technical assistance of Dr. Yuan Cao for the electron microscopy photographing. The authors would like to express gratitude to EditSprings (https:// www.editsprings.cn/) for the expert linguistic services provided. We thank two anonymous reviewers for their constructive comments. This work was supported by the Fundamental Research Funds of Chinese Academy of Forestry (CAFYBB2018ZX001) and the Scientific Development and Research Foundation of Zhejiang A&F University (203402017601) .

语种：英文

外文关键词：fluctuating conditions; photoinhibition; photosynthesis; plasticity; Populus alba

摘要：The ability to modulate photosynthesis is essential for plants to adapt to fluctuating growing conditions. Populus species show high tolerance to various and highly variable environments. To understand their response strategies against fluctuating environments, this study investigated the morphological and physiological differences of white poplar (Populus alba) leaves when grown in a phytotron, glasshouse, and field. Our results show that the palisade cells were elongated in the field, which would enhance intercellular CO2 exchange. Photosynthetic capacity was the highest in the field leaves, as shown by higher electron transport rates (1.8 to 6.5 times) and carbon assimilation rates (2.7 to 4.2 times). The decrease of PSI acceptor-side limitation and increase of PSI donor-side limitation suggests changes in PSI redox status may contribute to photoprotection. This plasticity of white poplar allows adjusting its structure and photosynthesis under fluctuating conditions, which may partly enable its outstanding tolerance against environmental changes.