SCSIO OpenIR  > 中科院海洋生物资源可持续利用重点实验室
Arctic Micromonas uses protein pools and non-photochemical quenching to cope with temperature restrictions on Photosystem II protein turnover
Ni, G; Zimbalatti, G; Murphy, CD; Barnett, AB; Arsenault, CM; Li, G; Cockshutt, AM; Campbell, DA; dcampbell@mta.ca
2017
Source PublicationPHOTOSYNTHESIS RESEARCH
Volume131Issue:2Pages:203-220
AbstractMicromonas strains of small prasinophyte green algae are found throughout the world's oceans, exploiting widely different niches. We grew arctic and temperate strains of Micromonas and compared their susceptibilities to photoinactivation of Photosystem II, their counteracting Photosystem II repair capacities, their Photosystem II content, and their induction and relaxation of non-photochemical quenching. In the arctic strain Micromonas NCMA 2099, the cellular content of active Photosystem II represents only about 50 % of total Photosystem II protein, as a slow rate constant for clearance of PsbA protein limits instantaneous repair. In contrast, the temperate strain NCMA 1646 shows a faster clearance of PsbA protein which allows it to maintain active Photosystem II content equivalent to total Photosystem II protein. Under growth at 2 A degrees C, the arctic Micromonas maintains a constitutive induction of xanthophyll deepoxidation, shown by second-derivative whole-cell spectra, which supports strong induction of non-photochemical quenching under low to moderate light, even if xanthophyll cycling is blocked. This non-photochemical quenching, however, relaxes during subsequent darkness with kinetics nearly comparable to the temperate Micromonas NCMA 1646, thereby limiting the opportunity cost of sustained downregulation of PSII function after a decrease in light.
Department[Ni, Guangyan; Zimbalatti, Gabrielle; Murphy, Cole D.; Arsenault, Christopher M.; Li, Gang; Cockshutt, Amanda M.; Campbell, Douglas A.] Mt Allison Univ, Dept Chem & Biochem, 63B York St, Sackville, NB E4L 3M7, Canada; [Ni, Guangyan] Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, South China Bot Garden, Guangzhou 510160, Guangdong, Peoples R China; [Barnett, Audrey B.] Michigan Technol Univ, Houghton, MI 49931 USA; [Li, Gang] Chinese Acad Sci, Key Lab Trop Marine Bioresources & Ecol, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China
KeywordPrasinophyte Photosystem Ii Photoinactivation Xanthophyll Cycle
Funding ProjectLMB
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/16234
Collection中科院海洋生物资源可持续利用重点实验室
Corresponding Authordcampbell@mta.ca
Recommended Citation
GB/T 7714
Ni, G,Zimbalatti, G,Murphy, CD,et al. Arctic Micromonas uses protein pools and non-photochemical quenching to cope with temperature restrictions on Photosystem II protein turnover[J]. PHOTOSYNTHESIS RESEARCH,2017,131(2):203-220.
APA Ni, G.,Zimbalatti, G.,Murphy, CD.,Barnett, AB.,Arsenault, CM.,...&dcampbell@mta.ca.(2017).Arctic Micromonas uses protein pools and non-photochemical quenching to cope with temperature restrictions on Photosystem II protein turnover.PHOTOSYNTHESIS RESEARCH,131(2),203-220.
MLA Ni, G,et al."Arctic Micromonas uses protein pools and non-photochemical quenching to cope with temperature restrictions on Photosystem II protein turnover".PHOTOSYNTHESIS RESEARCH 131.2(2017):203-220.
Files in This Item:
File Name/Size DocType Version Access License
Arctic Micromonas us(1534KB)期刊论文作者接受稿开放获取CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.