Fluctuating light induces a significant photoinhibition of photosystem I in maize

doi:10.1016/j.plaphy.2024.108426

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	Fluctuating light induces a significant photoinhibition of photosystem I in maize
	Yang, Qiu-Yan; Wang, Xiao-Qian; Yang, Ying-Jie; Huang, Wei
	2024
发表期刊	PLANT PHYSIOLOGY AND BIOCHEMISTRY
ISSN	0981-9428
卷号	207 页码:108426
摘要	In nature, light intensity usually fluctuates and a sudden shade -sun transition can induce photodamage to photosystem I (PSI) in many angiosperms. Photosynthetic regulation in fluctuating light (FL) has been studied extensively in C3 plants; however, little is known about how C4 plants cope FL to prevent PSI photoinhibition. We here compared photosynthetic responses to FL between maize (Zea mays, C4) and tomato (Solanum lycopersicum, C3) grown under full sunlight. Maize leaves had significantly higher cyclic electron flow (CEF) activity and lower photorespiration activity than tomato. Upon a sudden shade -sun transition, maize showed a significant stronger transient PSI over -reduction than tomato, resulting in a significant greater PSI photoinhibition in maize after FL treatment. During the first seconds upon shade -sun transition, CEF was stimulated in maize at a much higher extent than tomato, favoring the rapid formation of trans-thylakoid proton gradient (ApH), which was helped by a transient down -regulation of chloroplast ATP synthase activity. Therefore, modulation of ApH by regulation of CEF and chloroplast ATP synthase adjusted PSI redox state at donor side, which partially compensated for the deficiency of photorespiration. We propose that C4 plants use different photosynthetic strategies for coping with FL as compared with C3 plants.
DOI	10.1016/j.plaphy.2024.108426
WOS记录号	WOS:001185496900001
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/76271
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Yang, Qiu-Yan,Wang, Xiao-Qian,Yang, Ying-Jie,et al. Fluctuating light induces a significant photoinhibition of photosystem I in maize[J]. PLANT PHYSIOLOGY AND BIOCHEMISTRY,2024,207:108426.
APA	Yang, Qiu-Yan,Wang, Xiao-Qian,Yang, Ying-Jie,&Huang, Wei.(2024).Fluctuating light induces a significant photoinhibition of photosystem I in maize.PLANT PHYSIOLOGY AND BIOCHEMISTRY,207,108426.
MLA	Yang, Qiu-Yan,et al."Fluctuating light induces a significant photoinhibition of photosystem I in maize".PLANT PHYSIOLOGY AND BIOCHEMISTRY 207(2024):108426.

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