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Initial low oxygen stress offers no scald control benefits to 'Starkrimson Delicious' apples in 0.7 kPa O2 storage.

Lau, O. L.;

HortScience Year: 1997 Vol: 32 Issue: 7 Pages: 1239-1241 Ref: 14 ref.

1997

บทคัดย่อ

Initial low oxygen stress offers no scald control benefits to 'Starkrimson Delicious' apples in 0.7 kPa O2 storage.

In a 2-year study, the benefits and risks of an initial low O2 stress treatment (ILOS, 0.04 kPa O2 for 10 days), as a supplement to 1.5 or 0.7 kPa O2 storage at 0 deg C, for controlling scald in apples (cv. Starkrimson Delicious), were evaluated. The fruits were picked from 15 orchards in British Columbia and harvested over 5 successive weeks to generate a wide range in maturity. Storage in 0.7 kPa O2 did not adequately control scald in fruits picked at starch index between 1.0 and 2.1 (10-35% scald), but reduced watercore-induced breakdown in fruits picked at starch index more than or equal to 2.4 (0-9 scale). The ILOS treatment gave a statistically significant but commercially nonsignificant scald control benefit for fruits stored in 1.5 kPa O2 in 1 year, but not to fruits stored in 0.7 kPa O2. ILOS did not increase alcoholic taste, but increased skin purpling in 0.7 kPa O2-stored fruits from the final harvest in 1 year. ILOS decreased flesh firmness in fruits picked at starch index more than

or equal to 1.7, and increased watercore-induced breakdown in fruits picked at starch index more than or equal to 2.1 in both years.