REDUCTION OF DEHYDRO-L-ASCORBIC ACID IN GREEN LEAVES |
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Authors: | IKEDA SHIZUNORI |
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Institution: | Research Institute for Food Science, University of Kyoto |
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Abstract: | - The capacity of green leaves for absorbing and converting substancesrelated to L-ascorbic acid was investigated, using detachedleaves of various plants, including soybean, pea, barley andspinach.
- The greater portion of the absorbed dehydroascorbicacid wasrecovered in the leaves as ascorbic acid, minor portionsbeingdiscovered as dehydroascorbic acid and 2,3-diketogulonicacid. The recovery was about 60% of the absorbed dehydro ascorbicacid, in the cases of detached soybean and barley leaves, forinstance, thus suggesting the instability of the substance invivo.
- The absorption and conversion of ascorbic acid and 2,3-di-ketogulonic acid in detached green leaves were also investigated.Most of the absorbed ascorbic acid reappeared in the leaves.On the other hand, no evidence for the conversion of 2,3-diketogulonicacid into ascorbic and dehydroascorbic acids was observed. Thegreater portion of the absorbed 2, 3-diketogulonic acid seemsto be decomposed in the leaves, under the condition of the presentstudy.
(Received April 17, 1961; ) |
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