PHOTOSYNTHESIS OF GLYCINE AND SERINE IN GREEN PLANTS

概要

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1. The effects of "carbonyl" reagents on the photosynthetic in-corporation of ^<14>CO_2 into the assimilation products of tobacco and spinach leaves were studied. The presence of "carbonyl" reagents causes an increase in the ratio of ^<14>CO_2 incorporated in glycine and a decrease in serine. The incorporation of ^<14>C from glycolate-1-^<14>C and glycolaldehyde-2-^<14>C into glycine and serine was also affected by "carbonyl" reagents, as in the case of ^<14>CO_2-experiment. 2. The feeding experiments of glycine-1-^<14>C and serine-1-1'1C in the presence and in the absence of "carbonyl" reagents revealed that these reagents inhibit the conversion of glycine to serine. 3. The results obtained above, together with the effects of thiols on ^<14>CO_2 incorporation presented in this paper, support the assumption that glycine and serine are formed via glycolate and glyoxylate during photosynthesis in green plants. 4. Comparison of ^<14>C incorporation in malate from ^<14>CO_2, glycolate-1-^<14>C, glycine-1-^<14>C and serine-1-^<14>C in the presence and in the absence of "carbonyl" reagents suggested the occurrence of the pathway of the malate formation via glycolate and glyoxylate, not passing through glycine and serine, during photosynthesis.
日本植物生理学会の論文