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

Contributors

Chen, Mei; Zhang, Jin; Zhao, Lei; Xing, Jiale; Peng, Lianwei; Kuang, Tingyun; Rochaix, Jean-David; Huang, Fang

Published in

Journal of Integrative Plant Biology, vol. 58, no. 12, p. 943-946

Publication date

2016

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/metabolism
  • Chlamydomonas/metabolism
  • Genetic Complementation Test
  • Hydrogen/metabolism
  • Photochemical Processes
  • Protons
  • Reactive Oxygen Species/metabolism

UNIGE affiliation entities

Citation (ISO format)

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

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Article (Published version)

Identifiers

Journal ISSN

1672-9072
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521downloads

Technical informations

Creation

24/11/2018 18:38:00

First validation

24/11/2018 18:38:00

Update

15/03/2023 13:55:00

Status update

15/03/2023 13:54:59

Last indexation

31/10/2024 11:56:17
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