Studies on organic acid metabolism and ethylene production during controlled atmosphere storage of apples (Mallus pumila MILLER, cv. Rolls)

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Organic acid metabolism and ethylene formation during controlled atmosphere storage (CA-storage) of apples (Mallus pumila MILLER, cv Rolls) were studied. A higher titratable acidity was observed in apples during CA-storage as compared to those in air control. The incorporation of atmospheric ^<14>CO_2 into malic acid was greater in apples "stored ill the higher CO_2 concentration. The conversion of succinic, acid-^<14>C into fumaric acid-^<14>C was slightly less in the apple in modified high carbon dioxide atmosphere than those in air. O_2 uptake and CO_2 output by apple slices were markedly inhibited by the addition of succinic and malic acids at a concentration higher than 25m_M. These factors seem to be the possible cause of a higher acidity of fruits stored in CA-condition, Ethylene production from whole fruits or tissue slices was markedly inhibited under CA-condition. The retardation of acid metabolism and the inhibition of ethylene production of apples during CA-storage seem to be the important factors which help to maintain their storage quality.
日本植物生理学会の論文