Alicyclic acid metabolism in plants 7. Metabolism of 14G-labelled alicyclic acids in germinating Phaseolus mungo seeds |
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Authors: | Minamikawa Takao |
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Affiliation: | Department of Biology, Tokyo Metropolitan University Setagaya-ku, Tokyo 158, Japan |
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Abstract: | When Phaseolus mungo seeds were allowed to germinate in 520mM quinate solution in the dark, a marked increase in the endogenousshikimic acid level occurred in their tissues. The acid levelrose distincdy on the 2nd day of germination and reached a maximumon the 4th day. The quinate-14C fed to germinating seeds waspredominantly converted to shikimic acid, and little radioactivitywas found in 3-dehydroshikimic acid. When quinate-14C was suppliedsimultaneously with relatively high concentrations of 3-dehydroquinicacid or 3-dehydroshikimic acid, its conversionto shikimic acidwas restrained, but hardly any radioactivity was trapped ineither of the dehydro compounds. 3-Dehydroquinic acid-14C or3-dehydroshikimic acid-14C fed to the seeds was metabolizedpreferentially to shikimic acid. The experimental results arediscussed with respect to the metabolic relationship betweenquinic acid and odier alicyclic acids in the aromatic biosynthesisof P. mungo seedlings. (Received October 16, 1975; ) |
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