The role of chloroplastic NAD(P)H dehydrogenase in photoprotection. |
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| Authors: | T Endo T Shikanai A Takabayashi K Asada F Sato |
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| Institution: | Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Japan. tuendo@kais.kyoto-u.ac.jp |
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| Abstract: | 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. |
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