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A Supercomplex, of Approximately 720 kDa and Composed of Both Photosystem Reaction Centers, Dissipates Excess Energy by PSI in Green Macroalgae Under Salt Stress
Gao, Shan1,2,3; Chi, Zhen4,5; Chen, Hailong4; Zheng, Zhenbing1,2,3,5; Weng, Yuxiang4; Wang, Guangce1,2,3
2019
Source PublicationPLANT AND CELL PHYSIOLOGY
ISSN0032-0781
Volume60Issue:1Pages:166-175
Corresponding AuthorWeng, Yuxiang(yxweng@iphy.ac.cn) ; Wang, Guangce(gcwang@qdio.ac.cn)
AbstractThe thylakoid membranes of plants play a critical role in electron transfer and energy fixation, and are highly dynamic. So far, studies on the thylakoid membranes have mainly focused on microalgae and higher plants, yet very little information is available on the macroalgal thylakoids. Here, we studied the structure and organization of the thylakoid membranes in Ulva prolifera, a representative species of the green macroalgae. We found that U. prolifera had few but long loosely stacked membranes which lack the conventional grana found in higher plants. However, the thylakoid membrane complexes demonstrate lateral heterogeneity. Moreover, we found a supercomplex composed of PSII, light-harvesting complex II (LHCII) and PSI from U. prolifera under salt stress. The supercomplex is approximately 720 kDa, and includes the two important photoprotection proteins, the PSII S subunit (PsbS) and the light-harvesting complex stress-related protein (LhcSR), as well as xanthophyll cycle pigments (violaxanthin, antheraxanthin and zeaxanthin). Time-resolved fluorescence analysis suggested that, in the supercomplex, excitation energy could efficiently be transferred from PSII to PSI, even when PSII was inhibited, a function which disappeared when the supercomplex was incubated in mild detergent. We suggest that the supercomplex might be an important mechanism to dissipate excess energy by PSI in green macroalgae under salt stress.
KeywordIntertial macroalgae Photosystems Salt stress Supercomplex Thylakoid membrane Ulva prolifera
DOI10.1093/pcp/pcy201
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41606161] ; National Natural Science Foundation of China[41676157] ; National Natural Science Foundation of China[41476140] ; Distinguished Young Scientists Research Fund of Key Laboratory of Experimental Marine Biology, Chinese Academy of Sciences[KLEMB-DYS02] ; China Agriculture Research System[CARS-50] ; Key Laboratory of Algal Biology Institute of Hydrobiology Chinese Academy of Sciences[2017-003] ; Project of Science and Technology Bureau of Nantong[MS12017025-4]
WOS Research AreaPlant Sciences ; Cell Biology
WOS SubjectPlant Sciences ; Cell Biology
WOS IDWOS:000459633500016
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/155582
Collection实验海洋生物学重点实验室
Corresponding AuthorWeng, Yuxiang; Wang, Guangce
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao, Peoples R China
3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China
4.Chinese Acad Sci, Inst Phys, Lab Soft Matter Phys, Beijing, Peoples R China
5.Univ Chinese Acad Sci, Beijing, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Gao, Shan,Chi, Zhen,Chen, Hailong,et al. A Supercomplex, of Approximately 720 kDa and Composed of Both Photosystem Reaction Centers, Dissipates Excess Energy by PSI in Green Macroalgae Under Salt Stress[J]. PLANT AND CELL PHYSIOLOGY,2019,60(1):166-175.
APA Gao, Shan,Chi, Zhen,Chen, Hailong,Zheng, Zhenbing,Weng, Yuxiang,&Wang, Guangce.(2019).A Supercomplex, of Approximately 720 kDa and Composed of Both Photosystem Reaction Centers, Dissipates Excess Energy by PSI in Green Macroalgae Under Salt Stress.PLANT AND CELL PHYSIOLOGY,60(1),166-175.
MLA Gao, Shan,et al."A Supercomplex, of Approximately 720 kDa and Composed of Both Photosystem Reaction Centers, Dissipates Excess Energy by PSI in Green Macroalgae Under Salt Stress".PLANT AND CELL PHYSIOLOGY 60.1(2019):166-175.
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