ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Physiological and biochemical basis for the Braeburn browning disorder (BBD).

Burmeister, D. M.; Roughan, S.;

Postharvest Horticulture Series - Department of Pomology, University of California Year: 1997 Issue: No. 16 Pages: 126-131 Ref: 12 ref.

1997

บทคัดย่อ

Experiments were conducted over 2 seasons with Braeburn apple fruits harvested in New Zealand to determine the physiological and biochemical basis for Braeburn browning disorder (BBD). Susceptibility to BBD was varied by harvesting early (not susceptible) or late (susceptible) or by delaying application of controlled atmosphere (CA) storage by 14 days. Ethanol and acetaldehyde accumulation and ascorbate content were measured in fruits at intervals between 0 and 21 days after CA application. There was no clear association between acetaldehyde or ethanol accumulation and BBD development. Ascorbate contents were almost always lower in CA-stored fruits than in control fruits stored in air. Ascorbate contents increased during storage for both harvests except for the late-harvested fruits placed in CA immediately where ascorbate levels declined and remained low. When CA application was delayed by 14 days, ascorbate contents were close to those in control fruits stored in air. In experiments where frui

ts were pretreated with C2H4 (approx. 200 micro l/litre for 12 h at 20 deg C), the ethylene inhibitor diazocyclopentadiene (DACP, 10 ml of pre-irradiated DACP for 12 h at 20 deg ) or diphenylamine (DPA) prior to storage in 1.5 kPa O2:5.0 kPa CO2 for 4 weeks, C2H4 pretreatment reduced BBD development from 52.9% in controls (no pretreatment) to 22.3% and DPA reduced BBD incidence to 2.5%, but DACP had no effect on BBD incidence. The mechanisms of acclimatization and the relationship of BBD to fruit respiratory behaviour and oxidative metabolism are discussed.