บทคัดย่องานวิจัย

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Effect of carbon dioxide partial pressure on blueberry fruit respiration and respiratory quotient.

Beaudry, R. M.;

Postharvest Biology and Technology Year: 1993 Vol: 3 Issue: 3 Pages: 249-258 Ref: 25 ref.

1993

บทคัดย่อ

Effect of carbon dioxide partial pressure on blueberry fruit respiration and respiratory quotient.

Vaccinium corymbosum fruits (cultivars Bluecrop and Elliot) were sealed in 0.00254-cm-thick low density polyethylene packages and stored in gas-tight containers at 1 deg C. The chambers were continually purged with gas mixtures containing levels of CO2 sufficient to produce approx. 5, 20, 40 or 60 kPa CO2 in the pouches. Sampling the gas composition of the enclosed package permitted measurement of O2 uptake and CO2 production rates and calculation of the respiratory quotient (RQ) despite the high background CO2 level. O2 uptake was minimally affected by the CO2 treatments. RQ was dependent on both O2 and CO2 levels, increasing as O2 declined and as CO2 increased. As O2 declined, the O2 level at which RQ began to increase (RQ breakpoint) increased with CO2 partial pressure. The lower O2 limit was estimated to be 6, 7, 11 and 23 kPa O2 for the 5, 20, 40 and 60 kPa CO2 treatments, respectively.