ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Effects of temperature on gas exchange of 'Braeburn' apples.

Cheng QingMin; Banks, N. H.; Nicholson, S. E.; Kingsley, A. M.; Mackay, B. R.;

New Zealand Journal of Crop and Horticultural Science Year: 1998 Vol: 26 Issue: 4 Pages: 299-306 Ref: 21 ref.

1998

บทคัดย่อ

Variations in respiration rates, internal partial pressures of O2 and CO2, and skin permeance to O2 and CO2 associated with storage at 0, 5, 10, 15, 20, 25 or 30 deg C were characterised in Braeburn apple fruits (grown in New Zealand). There was an 11-fold difference in respiration rate between fruits kept at 0 and 30 deg C, although permeance to each of the 2 respiratory gases differed only by a factor of 2. The effect of temperature on these 2 variables was responsible for the depression of internal O2 and elevation of internal CO2 concentrations associated with increasing temperature from 0 to 30 deg C. The magnitude of decline in internal O2 was slightly greater than the increase in internal CO2 over the temperature range in the experiment. For fruits that were respiring aerobically, and with a respiratory quotient of unity, this would indicate that the fruit skin had a somewhat higher permeance to CO2 than to O2. Permeance values for the 2 respiratory gases were strongly related but permean

ce to CO2 exceeded that to O2 for fruits with a low permeance to O2. This was attributed to the greater ease of diffusion of CO2 through the cuticle, an effect which became more pronounced as transcuticular diffusion was facilitated at high temperatures.