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Quantitative proteomics reveals redox-based functional regulation of photosynthesis under fluctuating light in plants

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Journal of Integrative Plant Biology 2022年第11期64卷 2168-2186页

作者： Qi Chen Yixian Xiao Yu Ming Rong Peng Jiliang Hu Hong-Bin Wang Hong-Lei Jin Institute of Medical Plant Physiology and Ecology School of Pharmaceutical SciencesGuangzhou University of Chinese MedicineGuangzhou 510006China

Photosynthesis involves a series of redox reactions and is the major source of reactive oxygen species in plant *** light(FL) levels,which occur commonly in natural environments,affect photosynthesis;however,little is known about the specific effects of FL on the redox regulation of ***,we performed global quantitative mapping of the Arabidopsis thaliana cysteine thiol redox proteome under constant light and FL *** identified8857 redox-switched thiols in 4350 proteins,and1501 proteins that are differentially modified depending on light ***,proteins related to photosynthesis,especially photosystem I(PSI),are operational thiol-switching *** of wild-type *** to FL resulted in decreased PSI abundance,stability,and ***,in response to PSI photodamage,more of the PSI assembly factor PSA3 dynamically switches to the reduced ***,the Cys199 and Cys200 sites in PSA3 are necessary for its full ***,thioredoxin m(Trx m) proteins play roles in redox switching of PSA3,and are required for PSI activity and *** study thus reveals a mechanism for redox-based regulation of PSI under FL,and provides insight into the dynamic acclimation of photosynthesis in a changing environment.

关键词： fluctuating light photosystem I photosynthesis redox regulation thioredoxin

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Plants response to light stress

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Journal of Genetics and Genomics 2022年第8期49卷 735-747页

作者： Yafei Shi Xiangsheng Ke Xiaoxia Yang Yuhan Liu Xin Hou State Key Laboratory of Hybrid Rice Hubei Hongshan LaboratoryCollege of Life SciencesWuhan UniversityWuhanHubei 430072China

Plants require solar energy to grow through oxygenic photosynthesis;however,when light intensity exceeds the optimal range for photosynthesis,it causes abiotic stress and physiological damage in *** response to high light stress,plants initiate a series of signal transduction from chloroplasts to whole cells and from locally stressed tissues to the rest of the plant *** signals trigger a variety of physiological and biochemical reactions intended to mitigate the deleterious effects of high light intensity,such as photodamage and *** stress protection mechanisms include chloroplastic Reactive oxygen species(ROS)scavenging,chloroplast and stomatal movement,and anthocyanin *** apparatuses,being the direct targets of photodamage,have also developed various acclimation processes such as thermal energy dissipation through nonphotochemical quenching(NPQ),photorepair of Photosystem II(PSII),and transcriptional regulation of photosynthetic *** light is another mild but persistent type of light stress in nature,which unfortunately has been poorly *** studies,however,suggest that state transitions and cyclic electron transport are the main adaptive mechanisms for mediating fiuctuating light stress in ***,we review the current breadth of knowledge regarding physiological and biochemical responses to both high light stress and fiuctuating light stress.

关键词： Photosynthesis light stress Photorepair High light fluctuating light

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