PGR5-dependent cyclic electron transport around PSI contributes to the redox homeostasis in chloroplasts rather than CO(2) fixation and biomass production in rice.

@article{Nishikawa2012PGR5dependentCE,
  title={PGR5-dependent cyclic electron transport around PSI contributes to the redox homeostasis in chloroplasts rather than CO(2) fixation and biomass production in rice.},
  author={Yuri Nishikawa and Hiroshi Yamamoto and Yuki Okegawa and Shinya Wada and Nozomi Sato and Yoshichika Taira and Kazuhiko Sugimoto and Amane Makino and Toshiharu Shikanai},
  journal={Plant & cell physiology},
  year={2012},
  volume={53 12},
  pages={2117-26}
}
The PGR5 (PROTON GRADIENT REGULATION 5) gene that is required for PSI cyclic electron transport in Arabidopsis was knocked down in rice (Oryza sativa). In three PGR5 knockdown (KD) lines, the PGR5 protein level was reduced to 5-8% of that in the wild type, resulting in a 50% reduction in PGRL1 (PGR5-LIKE PHOTOSYNTHETIC PHENOTYPE 1) protein levels. In ruptured chloroplasts, ferredoxin-dependent plastoquinone reduction activity was partially impaired; the phenotype was mimicked by addition of… CONTINUE READING
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