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
发表期刊PHOTOSYNTHESIS RESEARCH
卷号131期号:2页码:203-220
摘要Micromonas 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.
部门归属[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
关键词Prasinophyte Photosystem Ii Photoinactivation Xanthophyll Cycle
资助项目LMB
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/16234
专题中科院海洋生物资源可持续利用重点实验室
通讯作者dcampbell@mta.ca
推荐引用方式
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.
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