บทคัดย่องานวิจัย

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Responses of colour change and softening to O2 and CO2 in 'Braeburn' apples.

Banks, N. H.; Jeffery, P. B.; MacKay, B. R.;

Postharvest Horticulture Series - Department of Pomology, University of California Year: 1997 Issue: No. 16 Pages: 36-41 Ref: 7 ref.

1997

บทคัดย่อ

Responses of colour change and softening to O2 and CO2 in 'Braeburn' apples.

Data on colour change and softening were collected in trials with Braeburn apples stored for 17 weeks at 0 deg C in 34 combinations of O2 and CO2 partial pressures. Both processes were markedly inhibited by reduced O2 level and enhanced by elevated CO2 partial pressure. Variation in rates of colour change was consistent with Michaelis-Menten kinetics with respect to O2, with an apparent Km for O2 of 1.9 kPa. Effects of CO2 on colour change appeared to be consistent with a competitive model, with an apparent Ki of 1.3 kPa. Responses of firmness to the 2 gases were adequately described by a simple linear and additive model. It is suggested that this approach, coupled with an analogous analysis of the responses of disorders to atmospheric composition, would allow atmospheres to be optimized with much greater precision and confidence than has hitherto been feasible. The optimum modified atmosphere for the batch of fruits used in this study appeared to be about 2 kPa O2 and 1 kPa CO2.