Biosynthesis of alicyclic acids from 14C-labeled glucose and erythrose by isolated cells from Vigna angularis leaves |
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Authors: | Tazaki Kiyoshi |
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Affiliation: | Department of Biology, Tokyo Metropolitan University Setagaya-ku, Tokyo 158, Japan |
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Abstract: | Mesophyll cells isolated enzymatically from Vigna angularisleaves were fed 14Cglucose or 14C-erythrose and the time-courseof 14C incorporation into shikimic and quinic acids was examined.When 14C-glucose was fed to the cells, the highest radioactivityin quinic acid was observed after 10 hr of incubation, whilethat in shikimic acid was after 14 hr. In the experiment with14C-erythrose, the radioactivity in shikimic acid rose strikinglyup to the 3rd hour, but 14C in quinic acid increased graduallyduring the incubation. The incorporation of 14C into shikimicacid was enhanced when unlabeled shikimic or quinic acid wassupplied to the cells simultaneously with either 14C-glucoseor 14G-erythrose, whereas that into quinic acid was not significantlyincreased by these alicyclic acids. The difference in incorporationrate of 14C into quinic acid from that into shikimic acid wasmore conspicuous in the isolated mesophyll cells than in theepicotyls of V. angularis seedlings. 1 Present address: Department of Biology, Faculty of Science,Kumamoto University, Kumamoto 860, Japan. (Received September 22, 1978; ) |
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