ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Ethylene production in netted muskmelon subjected to postharvest heating and refrigerated storage.

Ethylene production in netted muskmelon subjected to postharvest heating and refrigerated storage.

HortScience Year: 1990 Vol: 25 Issue: 2 Pages: 207-209 Ref: 26 ref.

1990

บทคัดย่อ

Postharvest ethylene production and ACC levels were determined in cv. Magnum 45 exposed to temperature extremes by heating for 3 h at 45 deg C and/or storage at 4 deg . The possibility of using seal-packaging to protect the fruits against temperature-induced changes in ethylene production was examined by wrapping before treatment with a high-density polyethylene (HDPE) shrink-film. Ethylene production measured in fruits immediately after heating or removal from refrigeration was only 30% of that determined before treatment, and continued to decline during refrigerated storage. However, the concentration of ACC in these same tissues remained constant or even increased slightly during storage. Wrapping fruits in HDPE film had no effect on the tissue concentrations of ACC or capacity for ethylene synthesis. In contrast to initial measurements, heated or refrigerated fruits held at room temperature (25 deg ) for 24 h produced ethylene at rates that equalled or exceeded the levels for freshly harvest

ed fruits. The results strongly suggest that temperature-imposed restrictions on ethylene synthesis by netted muskmelon fruits are reversible and occur at the step responsible for converting ACC to ethylene via EFE (ethylene forming enzyme) rather than during the synthesis of ACC.