Chloroplast NAD kinase is essential for energy transduction through the xanthophyll cycle in photosynthesis

Hideyuki Takahashi, Ayako Watanabe, Ayumi Tanaka, Shin Nosuke Hashida, Maki Kawai-Yamada, Kintake Sonoike, Hirofumi Uchimiya

研究成果: Article査読

53 被引用数 (Scopus)

抄録

Photosynthetic parameters of the nadk2 mutant of Arabidopsis thaliana, which is defective in chloroplast NAD kinase, were investigated. In this plant, the effective efficiency of photosynthetic electron transport (ΦII) and the quantum yield of open reaction centers of photosystem II (Fv′/Fm′) were decreased. Furthermore, an increase in non-photochemical quenching attributed to energy dissipation from the xanthophyll cycle was observed. The mutant showed an aberrant de-epoxidation state of xanthophyll cycle carotenoids and had a high level of zeaxanthin even under low light conditions. These results indicate that chloroplast NAD kinase, catalyzing phosphorylation of NAD, is essential for the proper photosynthetic machinery of PSII and the xanthophyll cycle.

本文言語English
ページ(範囲)1678-1682
ページ数5
ジャーナルPlant and Cell Physiology
47
12
DOI
出版ステータスPublished - 2006 12
外部発表はい

ASJC Scopus subject areas

  • 生理学
  • 植物科学
  • 細胞生物学

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