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Chlororespiration protects the photosynthetic apparatus against photoinhibition by alleviating inhibition of photodamaged-PSII repair in Haematococcus pluvialis at the green motile stage
Zhao, Jing1,2; Yu, Wenjie1,4; Zhang, Litao1,3; Liu, Jianguo1,3
2021-04-01
Source PublicationALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
ISSN2211-9264
Volume54Pages:8
Corresponding AuthorLiu, Jianguo(jgliu@qdio.ac.cn)
AbstractDuring outdoor mass cultivation, Haematococcus pluvialis cells, especially at the green motile stage, are frequently exposed to high light. However, the photoprotective mechanisms in H. pluvialis have not been well characterized. This study aimed to confirm the photoprotection of chlororespiration in H. pluvialis at the green motile stage. Under high light, inhibition of plastid terminal oxidase (PTOX), a key enzyme of chlororespiration, increased the relative variable fluorescence at the I-step (VI), causing a decrease in the plastoquinone (PQ) pool, which further led to photosystem II (PSII) acceptor side over-reduction. This condition disturbed the balance between light absorption and energy utilization, causing the over-excitation of PSII reaction centers, which was indicated by the fact that the inhibition of PTOX increased the relative variable fluorescence at the J-step (V-J) and the light absorption flux per active reaction center (ABS/RC), but decreased the electron transport flux per active reaction center (ETo/RC) in H. pluvialis. The over-reduction of the PSII acceptor side and the over-excitation of PSII reaction centers inevitably caused more severe photoinhibition as shown by a decrease in F-v/Fm (maximal photochemical efficiency of PSII). Furthermore, the level of photoinhibition was not changed when the PTOX was inhibited in the presence of the photodamaged-PSII repair inhibitor chloramphenicol, indicating that the inhibition of PTOX did not accelerate the photodamage to PSII directly. The above results suggest that the chlororespiration pathway protects H. pluvialis at the green motile stage against photoinhibition by decreasing the inhibition of the photodamaged-PSII repair mechanism.
KeywordChlororespiration Plastid terminal oxidase Photoprotection Haematococcus pluvialis
DOI10.1016/j.algal.2020.102140
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2018YFE0107200] ; National Natural Science Foundation of China[31872588] ; National Natural Science Foundation of China[U1706209] ; Shandong Provincial Natural Science Foundation, China[ZR2019BC057]
WOS Research AreaBiotechnology & Applied Microbiology
WOS SubjectBiotechnology & Applied Microbiology
WOS IDWOS:000632338300006
PublisherELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/170303
Collection实验海洋生物学重点实验室
Corresponding AuthorLiu, Jianguo
Affiliation1.Chinese Acad Sci, Ctr Ocean Megasci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao 266071, Peoples R China
2.Qingdao Agr Univ, Sch Marine Sci & Engn, Qingdao 266109, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao 266071, Peoples R China
4.Univ Chinese Acad Sci, Beijing 10049, Peoples R China
First Author AffilicationCenter for Ocean Mega-Science, Chinese Academy of Sciences
Corresponding Author AffilicationCenter for Ocean Mega-Science, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhao, Jing,Yu, Wenjie,Zhang, Litao,et al. Chlororespiration protects the photosynthetic apparatus against photoinhibition by alleviating inhibition of photodamaged-PSII repair in Haematococcus pluvialis at the green motile stage[J]. ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS,2021,54:8.
APA Zhao, Jing,Yu, Wenjie,Zhang, Litao,&Liu, Jianguo.(2021).Chlororespiration protects the photosynthetic apparatus against photoinhibition by alleviating inhibition of photodamaged-PSII repair in Haematococcus pluvialis at the green motile stage.ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS,54,8.
MLA Zhao, Jing,et al."Chlororespiration protects the photosynthetic apparatus against photoinhibition by alleviating inhibition of photodamaged-PSII repair in Haematococcus pluvialis at the green motile stage".ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS 54(2021):8.
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