The role of chloroplastic NAD(P)H dehydrogenase in photoprotection

FEBS Letters

Endo, Tsuyoshi³  Takabayashi, Atsushi³  Asada, Kozi²  Sato, Fumihiko³  Shikanai, Toshiharu¹ 

[1] Graduate School of Biological Sciences, Nara Institute of Science and Technology, Ikoma, Nara 630-0101, Japan;Department of Biotechnology, Faculty of Engineering, Fukuyama University, Gakuencho-1, Fukuyama 729-0292, Japan;Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Sakyo, Kyoto 606-8502, Japan

关键词: Chloroplast transformation;    Chlororespiration;    Ferredoxin-quinone reductase;    Ferredoxin-NADP+ reductase;    NAD(P)H dehydrogenase;    Fm;    maximum yield of fluorescence at closed PS II centers;    Fo;    minimum fluorescence yield at open PS II centers;    Fv;    Fm−Fo;    PS II;    photosystem II;   

DOI  :  10.1016/S0014-5793(99)00989-8

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

After a brief exposure to supra-saturating light, leaves of a tobacco transformant, in which chloroplastic NAD(P)H dehydrogenase (NDH) was defective, showed more severe photoinhibition than the wild-type, when judged by the parameter of chlorophyll fluorescence Fv/Fm. Repeated application of supra-saturating light eventually resulted in chlorosis in the NDH-defective mutant, while the wild-type sustained less photodamage and was able to recover from it. The mechanism of the phenomena is discussed with respect to the potential role of NDH in photosynthesis.

【 授权许可】

Unknown