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The role of chloroplastic NAD(P)H dehydrogenase in photoprotection
Author(s) -
Endo Tsuyoshi,
Shikanai Toshiharu,
Takabayashi Atsushi,
Asada Kozi,
Sato Fumihiko
Publication year - 1999
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(99)00989-8
Subject(s) - photoprotection , photoinhibition , chlorosis , nad+ kinase , photosynthesis , mutant , dehydrogenase , wild type , biochemistry , chemistry , chloroplast , nadh dehydrogenase , chlorophyll , biology , photosystem ii , botany , enzyme , gene , protein subunit
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 F v/ F m. 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.