Inhibition of Photosystems I and II and Enhanced Back Flow of Photosystem I Electrons in Cucumber Leaf Discs Chilled in the Light
Pre-illumination of cucumber leaf discs at a chilling temperature in low-irradiance white light resulted in accelerated re-reduction of P700+ [the special Chi pair in the photosystem I (PSI) reaction centre] when the far-red measuring light was turned off. Measurements (in ± methyl viologen or ± DCMU conditions) of the re-reduction half time suggest that accelerated re-reduction of P700+ appeared to be predominantly due to charge recombination and only partly due to reductants sustained by...[Show more]
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|Source:||Plant and Cell Physiology|
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