ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Physiological and biochemical responses of "Hass" avocado fruits to cold-storage in controlled atmospheres.

Corrales-Garcia, J.;

Postharvest Horticulture Series - Department of Pomology, University of California Year: 1997 Issue: No. 17 Pages: 69-74 Ref: 23 ref.

1997

บทคัดย่อ

Late-season avocado fruits (cv. Hass) were stored at 2 deg or 5 deg C for 30 days in air or in controlled atmospheres (CA) containing 5% O2 + 5% CO2 (5+5) or 2% O2 + 15% CO2 (2+15), the balance being N2 in both CA. The fruits were evaluated immediately upon removal from cold storage (unripe), and during ripening in air at 20 deg . Softening, external colour change and respiratory climacteric of the fruits were delayed by cold storage, especially in CA. Fruits showed atypical respiratory rate patterns in general. Fruits stored in air showed notably higher respiratory rates than those stored in both CA. The climacteric peak occurred after one day at 20 deg in fruits stored in air or in (5+5); fruits stored in (2+15) peaked after 2 days. In general, acetaldehyde contents were significantly higher in unripe fruits than in ripe fruits, whereas ethanol contents were significantly higher in ripe fruits than in unripe fruits (acetaldehyde probably became ethanol during ripening). Cold storage in air res

ulted in significantly higher contents of ethanol than cold storage in CA. Fruits stored in (2+15) had significantly lower levels of acetaldehyde and ethanol than fruits stored in air or in (5+5), indicating that the most extreme CA reduced this adverse effect caused by cold storage (chilling injury).