Drought stress delays photosynthetic induction and accelerates photoinhibition under short-term fluctuating light in tomato

doi:10.1016/j.plaphy.2023.01.044

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	Drought stress delays photosynthetic induction and accelerates photoinhibition under short-term fluctuating light in tomato
	Sun,Hu; Shi,Qi; Liu,Ning-Yu; Zhang,Shi-Bao; Huang,Wei
	2023
发表期刊	PLANT PHYSIOLOGY AND BIOCHEMISTRY
ISSN	1873-2690
卷号	196 页码:152-161
摘要	Fluctuating light (FL) and drought stress usually occur concomitantly. However, whether drought stress affects photosynthetic performance under FL remains unknown. Here, we measured gas exchange, chlorophyll fluo-rescence, and P700 redox state under FL in drought-stressed tomato (Solanum lycopersicum) seedlings. Drought stress significantly delayed the induction kinetics of stomatal and mesophyll conductances after transition from low to high light and thus delayed photosynthetic induction under FL. Therefore, drought stress exacerbated the loss of carbon gain under FL. Furthermore, restriction of CO2 fixation under drought stress aggravated the over-reduction of photosystem I (PSI) upon transition from low to high light. The resulting stronger FL-induced PSI photoinhibition significantly suppressed linear electron flow and PSI photoprotection. These results indicated that drought stress not only caused a larger loss of carbon gain under FL but also accelerated FL-induced pho-toinhibition of PSI. Furthermore, drought stress enhanced relative cyclic electron flow in FL, which partially compensated for restricted CO2 fixation and thus favored PSI photoprotection under FL. To our knowledge, we here show new insight into how drought stress affects photosynthetic performance under FL.
关键词	Drought Fluctuating light Mesophyll conductance Stomatal conductance Photoinhibition Photosynthesis CYCLIC ELECTRON FLOW PROTON MOTIVE FORCE PHOTOSYSTEM-I CO2 ASSIMILATION MESOPHYLL CONDUCTANCE GAS-EXCHANGE CHLOROPHYLL FLUORESCENCE TEMPERATURE RESPONSES LIMITATIONS
学科领域	Plant Sciences
DOI	10.1016/j.plaphy.2023.01.044
收录类别	SCI
WOS记录号	WOS:000927478300001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/75395
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Sun,Hu,Shi,Qi,Liu,Ning-Yu,et al. Drought stress delays photosynthetic induction and accelerates photoinhibition under short-term fluctuating light in tomato[J]. PLANT PHYSIOLOGY AND BIOCHEMISTRY,2023,196:152-161.
APA	Sun,Hu,Shi,Qi,Liu,Ning-Yu,Zhang,Shi-Bao,&Huang,Wei.(2023).Drought stress delays photosynthetic induction and accelerates photoinhibition under short-term fluctuating light in tomato.PLANT PHYSIOLOGY AND BIOCHEMISTRY,196,152-161.
MLA	Sun,Hu,et al."Drought stress delays photosynthetic induction and accelerates photoinhibition under short-term fluctuating light in tomato".PLANT PHYSIOLOGY AND BIOCHEMISTRY 196(2023):152-161.

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