Pyrone derivatives : effective inhibitors of photosynthetic electron flow system
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概要
- 論文の詳細を見る
The inhibitory effects of the pyrone derivatives, 6-(ω)-decenyl-2,3-dimethyl-γ-pyrone (DDP) and 6-farnesyl-2,3-dimethyl-γ-pyrone (FDP), on the photosynthetic electron flow system was investigated using the blue-green alga Anabaena variabilis and the green alga Chlorella pvrenoidosa. Both reagents inhibited photosynthesis in intact cells; 50% inhibition occurred at 2.7 × 10^<-5> M with DDP and at 4.3 × 10^<-6> M with FDP in Anabaena photosynthesis. The reagents suppressed the photosystem 11 reaction [water to 2,6-dichlorophenol indophenol (DCIP)] of Anabaena membrane fragments, but were far less inhibitory on the photo-system I reaction (DCIPH_2 to methyl viologen). The kinetics of the fluorescence induction indicated that the reagents do not block Q-reduction, but do suppress the oxidation of reduced Q indirectly. Oxygen evolution under repetitive flashes at a low repetition rate (5 Hz) was insensitive to the reagents even at concentrations which induced more than 50% inhibition. These results are evidence that DDP and FDP inhibit the plastoquinone reaction by slowing down its turnover rate. The advantages of pyrone derivatives are that they are inactive in the oxidation-reduction reaction and do not quench the fluorescence of chlorophyll in vivo.
- 日本植物生理学会の論文
著者
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Yoshida Shigeo
Department Of Internal Medicine Division I Kobe University School Of Medicine
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Takahashi Nobutaka
Department Of Agricultural Chemistry The University Of Takyo
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Kawamura Michio
Ocean Research Institute University Of Tokyo
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Fujita Yoshihiko
Ocean Research Institute University Of Tokyo
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Yoshida Shigeo
Department Of Earth And Planetary Physics Faculty Of Science University Of Tokyo
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Yoshida Shigeo
Department Of Biological Sciences Graduate School Of Science University Of Tokyo
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Takahashi Nobutaka
Department Of Agricultural Chemistry Faculty Of Agricultural Science University Of Tokyo
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Yoshida Shigeo
Department Of Agricultural Chemistry Faculty Of Agriculture University Of Tokyo
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