The metabolism of L-[6-^<14>C]ascorbic acid in detached grape leaves

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概要

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• Grape leaves (Vitis labrusca L.) that arc removed from the position opposite the flower cluster either 28 or 14 days before anthesis cleave L-ascorbic acid (AA) at the C4-C5 bond into a C4 and, presumably, a C_2 fragment. Leaves taken from this position 14 days after anthesis fail to cleave AA. The C4 fragment is utilized for L(+)-tartaric acid (TA) biosynthesis while the C_2 fragment is recycled into hexose and products of the hexose metabolism. When [6-^4<14>C]AA is the source of the label, the sucrose-derived glucose from labeled leaves has a distribution of ^4<14>C in the carbon skeleton as follows: C1, 35%; 2, 14%; C3, 4%; C(4+5), 13% and C6, 34%. The effect of inhibitors of the glycolate pathway on [6-^4<14>C]AA metabolism is examined.

• 日本植物生理学会の論文

著者

• Loewus Frank

  Department Of Agricultural Chemistry Washington State University

• Saito Kazumi

  Department of Agricultural Chemistry, Washington State University

• Saito Kazumi

  Department Of Agricultural Chemistry Washington State University:(present)the Radioisotope Research

関連論文

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