ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Postharvest response of apple fruits after storage in extreme gas concentrations. II. The occurrence of anaerobic metabolites.

Golias, J. and Bottcher, H.

Gartenbauwissenschaft. Volume 67, Issue 2, 2002. Pages 72–77.

2002

บทคัดย่อ

The effects of oxygen and carbon dioxide (CD) on the ethanol and acetaldehyde contents of apple fruits after controlled atmosphere storage (CAS) were studied. Fruits of Golden Delicious and Idared, harvested at preclimacteric and optimum maturity and at the ripening stage, were subjected to a CD:oxygen combination of 0.00:1.00, 0.03:21.00, or 8.00:1.00% within 18 h after harvest. Jonagold and Golden Delicious fruits harvested at optimum maturity from 10-year-old trees on rootstock M9 were stored, after cooling to 3 deg C, under a CO:oxygen of 0.1:0.2, 0.3:0.9, or 0.03:21.00% for 20 days, after which the fruits were exposed again to 3 deg C. Melrose and Idared fruits harvested at optimum maturity were subjected to the same condition for 25 days. Acetaldehyde and ethanol were measured starting at the end of the storage period after 7.5 months. In general, the acetaldehyde content decreased from the preclimacteric period until the mild ripening stage. The acetaldehyde content was between 0.11 and 0.35 mg/litre in Golden Delicious and from 0.20 to 0.74 mg/litre in Idared. The acetaldehyde content of Jonagold was similar to that of Golden Delicious. Ethanol content was higher in fruits harvested at later dates. Under normal air atmosphere, fruits of Idared had higher acetaldehyde content than those of Jonagold and Golden Delicious. The acetaldehyde content of fruits did not significantly vary with atmosphere storage. Ethanol concentration was higher under extreme (8% CO + 1% oxygen) than regular (0.03% CO + 21% oxygen) and low atmosphere conditions (1% CO + 1% oxygen). Jonagold consistently recorded lower ethanol level than Golden Delicious and Idared.