Photorespiration Alleviates Photoinhibition of Photosystem I under Fluctuating Light in Tomato

doi:10.3390/plants11020195

KIB OpenIR

	Photorespiration Alleviates Photoinhibition of Photosystem I under Fluctuating Light in Tomato
	Shi, Qi; Sun, Hu; Timm, Stefan; Zhang, Shibao; Huang, Wei
	2022
发表期刊	PLANTS-BASEL
卷号	11 期号:2 页码:195
摘要	Fluctuating light (FL) is a typical natural light stress that can cause photodamage to photosystem I (PSI). However, the effect of growth light on FL-induced PSI photoinhibition remains controversial. Plants grown under high light enhance photorespiration to sustain photosynthesis, but the contribution of photorespiration to PSI photoprotection under FL is largely unknown. In this study, we examined the photosynthetic performance under FL in tomato (Lycopersicon esculentum) plants grown under high light (HL-plants) and moderate light (ML-plants). After an abrupt increase in illumination, the over-reduction of PSI was lowered in HL-plants, resulting in a lower FL-induced PSI photoinhibition. HL-plants displayed higher capacities for CO2 fixation and photorespiration than ML-plants. Within the first 60 s after transition from low to high light, PSII electron transport was much higher in HL-plants, but the gross CO2 assimilation rate showed no significant difference between them. Therefore, upon a sudden increase in illumination, the difference in PSII electron transport between HL- and ML-plants was not attributed to the Calvin-Benson cycle but was caused by the change in photorespiration. These results indicated that the higher photorespiration in HL-plants enhanced the PSI electron sink downstream under FL, which mitigated the over-reduction of PSI and thus alleviated PSI photoinhibition under FL. Taking together, we here for the first time propose that photorespiration acts as a safety valve for PSI photoprotection under FL.
关键词	photorespiration cyclic electron flow photoinhibition photoprotection photosystem I CYCLIC ELECTRON FLOW PROTON MOTIVE FORCE CO2 ASSIMILATION FLAVODIIRON PROTEINS PHOTOSYNTHESIS TRANSPORT LEAF PHOTOPROTECTION CYANOBACTERIA ACCLIMATION
DOI	10.3390/plants11020195
收录类别	SCI
WOS记录号	WOS:000747289000001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/74766
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Shi, Qi,Sun, Hu,Timm, Stefan,et al. Photorespiration Alleviates Photoinhibition of Photosystem I under Fluctuating Light in Tomato[J]. PLANTS-BASEL,2022,11(2):195.
APA	Shi, Qi,Sun, Hu,Timm, Stefan,Zhang, Shibao,&Huang, Wei.(2022).Photorespiration Alleviates Photoinhibition of Photosystem I under Fluctuating Light in Tomato.PLANTS-BASEL,11(2),195.
MLA	Shi, Qi,et al."Photorespiration Alleviates Photoinhibition of Photosystem I under Fluctuating Light in Tomato".PLANTS-BASEL 11.2(2022):195.

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