บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Postharvest membrane permeability of apple.

Meresz, P.; Lovasz, T.; Berezvai, Z.;

Acta Horticulturae Year: 1994 Issue: No. 368 Pages: 285-290 Ref: 5 ref.

1994

บทคัดย่อ

Postharvest membrane permeability of apple.

ABSTRACT

Six apple cultivars (Jonathan M41, Jonnee, Jonagold, Gloster, Golden Delicious and Mutsu [Crispin]) were harvested at 3 maturity dates (optimum harvesting date and 10 days before and after optimum harvesting date) and stored at 2-3 deg C and 92-94% RH. The flux of ion-leakage through the cell-wall membrane complex was investigated at harvest and after 5, 6 and 7 months of storage. There was a significant increase in ion leakage at the last harvesting date but this disappeared during storage. The ion-leakage profile during storage was similar for all cultivars, increasing from harvest to Feb. and then decreasing to Mar. and Apr. There was also a significant decrease in pectin content and firmness from Sep. to Feb. after which these remained constant. The results support the hypothesis that after picking, decay of the middle lamella causes an increase in ion leakage but in later periods of storage the metabolic products of pectin are deposited in the wall thus decreasing permeability.