ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Modification of internal carbon dioxide and oxygen levels in apple fruit by postharvest calcium application and modified atmospheres.

Hewett, E. W.; Thompson, C. J.;

Postharvest Biology and Technology Year: 1992 Vol: 1 Issue: 3 Pages: 213-219 Ref: 20 ref.

1992

บทคัดย่อ

CO2 levels in the core of Cox's Orange Pippin and Braeburn apples, stored in air at 1 deg C in 1984 and 1985, were higher than in the surrounding air. The CO2 gradient between core and air for both cultivars over the 2 years averaged 1.1% at 1 deg and 3.5% after transfer to ambient temperatures. Vacuum infiltration of fruits with 2.5% CaCl2 increased internal CO2 and decreased O2 levels, and increased gradients between core and outside air, in fruits stored in either air or in modified atmospheres, compared with untreated fruits. Drenching of fruits with 3.0% CaCl2 did not influence internal gas levels or gradients. The highest internal CO2 and lowest O2 levels were generated in vacuum-infiltrated fruits subsequently stored in microperforated polymeric film bags at both 1 deg and after transfer to ambient temperatures, although gradients were less than in air-stored fruits. The results suggest that vacuum infiltration of apple fruits with CaCl2 filled the intercellular spaces of the outer cortical tissue forming a barrier to gas diffusion thus reducing CO2 and O2 exchange between the fruit tissue and the surrounding atmosphere.