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Title

Loss of algal Proton Gradient Regulation 5 increases reactive oxygen species scavenging and H2 evolution

Authors
Chen, Mei
Zhang, Jin
Zhao, Lei
Xing, Jiale
Peng, Lianwei
Kuang, Tingyun
Huang, Fang
Published in Journal of Integrative Plant Biology. 2016, vol. 58, no. 12, p. 943-946
Abstract We have identified hpm91, a Chlamydomonas mutant lacking Proton Gradient Regulation5 (PGR5) capable of producing hydrogen (H2 ) for 25 days with more than 30-fold yield increase compared to wild type. Thus, hpm91 displays a higher capacity of H2 production than a previously characterized pgr5 mutant. Physiological and biochemical characterization of hpm91 reveal that the prolonged H2 production is due to enhanced stability of PSII, which correlates with increased reactive oxygen species (ROS) scavenging capacity during sulfur deprivation. This anti-ROS response appears to protect the photosynthetic electron transport chain from photo-oxidative damage and thereby ensures electron supply to the hydrogenase.
Keywords Algal Proteins/metabolismChlamydomonas/metabolismGenetic Complementation TestHydrogen/metabolismPhotochemical ProcessesProtonsReactive Oxygen Species/metabolism
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PMID: 27762070
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CHEN, Mei et al. Loss of algal Proton Gradient Regulation 5 increases reactive oxygen species scavenging and H2 evolution. In: Journal of Integrative Plant Biology, 2016, vol. 58, n° 12, p. 943-946. doi: 10.1111/jipb.12502 https://archive-ouverte.unige.ch/unige:111402

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Deposited on : 2018-11-26

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