บทคัดย่องานวิจัย

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Controlled atmosphere effects on chilling requirements for ripening and ethylene synthesis of 'Bosc' and 'Packham's Triumph' pear fruits.

Maage, F.; Richardson, D. G.;

Postharvest Horticulture Series - Department of Pomology, University of California Year: 1997 Issue: No. 16 Pages: 151-155 Ref: 12 ref.

1997

บทคัดย่อ

Controlled atmosphere effects on chilling requirements for ripening and ethylene synthesis of 'Bosc' and 'Packham's Triumph' pear fruits.

Winter pears are harvested at maturity stages which normally require a period of time in low temperature (chilling requirement) in order to ripen to optimum dessert quality. In these trials, Golden Russet Bosc and Packham's Triumph pears were harvested at commercial maturity in Medford, Oregon, USA on 5 and 17 September, respectively, and stored in air or in controlled atmosphere (CA) storage (1.5-2.0% O2 and <0.5% CO2), both at 0 deg C. Compared with air storage, CA storage delayed ripening and ethylene synthesis by about 2 weeks in both cultivars, as evidenced by softening rates and sustainable internal ethylene rates of >1.0 micro l/litre. Peak internal ethylene production was considerably higher in Packham's Triumph fruits (>1000 micro l/litre) than in Golden Russet Bosc fruits (270 micro l/litre). 1-Aminocyclopropane-1-carboxylic acid (ACC) concentrations at various stages are tabulated. A chilling period of 4 weeks was more than enough to start the ripening process in Golden Russet Bosc pe

ars and just enough for Packham's Triumph pears.