ISHS Acta Horticulturae 398: Postharvest Physiology of Fruits
RELATION BETWEEN CHILLING SENSITIVITY AND POLYAMINE CONTENT IN SEVERAL MATURITY STAGES OF ZUCCHINI SQUASH. |
| Authors: | Y. Tatsumi, I. Kimura, K. Sumata |
| Abstract:
The polyamine content in zucchini squash (Cucurbita pepo L.) fruit of different maturity stages after pollination was examined in order to find out the relation between chilling sensitivity and fruit maturity. It was found that the development of chilling injury in the fruit stored at 5°C gradually decreased with its maturity. Putrescine (Put), spermidine (Spd) and spermine (Spn) were found in high levels in the fruit harvested at one day after pollination, and polyamine levels decreased with the progress of fruit maturity. Put level of fruit, which was harvested one to five days after pollination, increased during storage at 5°C, but the level of increment was more significant at the immature stage. Almost all maturity stage of the fruit showed the decrease of Spd. and Spn levels during storage at 5°C, with an only exception of Spn level in the fruit harvested one day after pollination. | |
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