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Relationships among bloom dates, ethylene climacteric initiation dates, and maturity-related storage disorders of Jonathan apples grown in Australia.

Blanpied, G. D.; Little, C. R.;

Postharvest Biology and Technology Year: 1991 Vol: 1 Issue: 1 Pages: 3-10 Ref: 10 ref.

1991

บทคัดย่อ

Relationships among bloom dates, ethylene climacteric initiation dates, and maturity-related storage disorders of Jonathan apples grown in Australia.

One hundred full bloom Jonathan apple flowers were tagged on each of 5 trees in each of 2 orchards in Victoria on 5 dates: 9, 14, 19, 24 and 30 Oct. 1988 (5000 tagged flowers). Three fruits/bloom date per tree (150 fruits) were collected in late Feb. and held at 20 deg C in individual fruit respirometers to determine ethylene climacteric (EC) dates. The rest of the bloom-tagged fruits were picked in Mar. and held in air at 0 deg until Aug. Mean EC dates for the Feb. sample were 145 plus or minus 3 days after each of the 5 bloom dates. The chronologically oldest fruits, those that developed from early blooming flowers, were the most advanced in maturity at harvest, had the highest incidence of low temperature breakdown (LTB) and the lowest incidence of storage scald. The chronologically youngest fruits, those that developed from late bloom flowers, were the least advanced in maturity at harvest, had the lowest incidence of LTB and the highest incidence of scald.