ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Harvest maturity and quality of new apple cultivars.

Jobling, J.; McGlasson, W. B.; Miller, P.; Hourigan, J.;

Acta Horticulturae Year: 1993 Issue: No. 343 Pages: 53-55 Ref: 1 ref.

1993

บทคัดย่อ

Harvest maturity indices (internal ethylene, CO2, ethylene climacteric (EC), ACC levels, ACC oxidase activity, flesh firmness, starch patterns, % soluble solids and titratable acidity) were measured in apple fruits (cultivars Gala, Fuji and Lady Williams). Fruits were stored at 0 deg C in a controlled atmosphere (1.5% O2, <0.5% CO2 and the remainder N2). Fruits were removed from cold storage after 3, 5, 7 and 9 months and assessed for storage life and sensory acceptability on return to air at 20 deg after 0, 4, 11, 18 and 25 days. The 3 cultivars had different patterns of ethylene production which influenced the storage life of the fruits. The EC procedure was found to be a good index of ideal harvest maturity for Gala; this was confirmed by sensory evaluation. This procedure was not applicable to Fuji and Lady Williams fruits. Harvest maturity was not critical for Fuji apples, which maintained a good level of consumer acceptability for up to 9 months in storage and 25 days at 20 deg in air. Lady Williams is a late-maturing cultivar and the level of acidity (which decreased with time) is an important quality parameter for fruits of this cultivar.