The extraordinary longevity of kleptoplasts derived from the Ross Sea haptophyte Phaeocystis antarctica within dinoflagellate host cells relates to the diminished role of the oxygen-evolving Photosystem II and to supplementary light harvesting by mycosporine-like amino acid/s

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• 作者：Kostas Stamatakis^a ; ^{kstam@bio.demokritos.gr} ; Dimitris Vayenos^a ; Christos Kotakis^a ; ^b ; ^d ; Rebecca J. Gast^c ; George C. Papageorgiou^a
• 关键词：DMF ; N ; N&prime ; &rsquo ; -dimethylformamide ; DCMU ; 3-(3 ; 4-dichloro-phenyl)-1 ; 1-dimethylurea ; MAA ; mycosporine-like amino acid ; p-NTP ; p-nitrothiophenol ; PBQ ; phenyl-p-benzoquinone ; ROS ; reactive oxygen species ; RSD ; kleptoplasts-hosting Ross Sea dinoflagellate ; Δλ ; full bandwidth at half-maximum
• 刊名：Biochimica et Biophysica Acta (BBA) - Bioenergetics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：1858
• 期：2
• 页码：189-195
• 全文大小：697 K
• 卷排序：1858

文摘

Ross Sea dinoflagellate kleptoplasts derived from P. antarctica photoevolve O2. UV-absorbing mycosporine-like amino acids (MAAs) sensitize Chl a fluorescence. Kleptoplast Photosystem II (PS II) activity is suppressed compared to chloroplasts. Less active PS II plus light harvesting by MAAs prolong kleptoplast functionality. RSD is efficient photo-heterotroph, whereas the algal prey is efficient photo-autotroph.