EFFECT OF {alpha}-HYDROXYSULFONATES ON PHOTOCHEMICAL REACTIONS OF SPINACH CHLOROPLASTS AND PARTICIPATION OF GLYOXYLATE IN PHOTOPHOSPHORYLATION |
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Authors: | ASADA, KOZI KITOH, SHUNJI DEURA, RYUICHIRO KASAI, ZENZABURO |
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Affiliation: | Research Institute for Food Science, Kyoto University Kyoto |
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Abstract: | - The effect of -hydroxy sulfonates and sulfite, inhibitors ofglycolate oxidase, on the photochemical reactions of spinachchloroplasts was studied. The photo reduction of ferricyanideand NADP was not affected by the poisons, whereas the photophosphorylationand 14CO2 fixation were inhibited.
- Glyoxylate was photoreducedby the chloroplasts in the presenceof PPNR and glyoxylate reductase,and this reduction was acceleratedby the addition of NADP.ATP formation accompanied with thereduction of glyoxylate bythe illuminated chloroplasts wasobserved. It is supposed thatglyoxylate oxidizes the photoreducedNADPH2 or PPNR and thusthe photophosphorylation is stimulated.
1A part of this paper was presented at the annual meeting ofAgricultural Society of Japan, in August, 1964.2Present address: Radiation Center of Osaka Prefecture, Sakai,Osaka. |
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