ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Additive effects of postharvest calcium and heat treatment on reducing decay and maintaining quality apples.

Conway, W.S., Sams, C. E., Wang, C. Y. and Abbott, J. A.

Journal of the American Society for Horticultural Science. Vol: 119 Issue: 1 Pages: 49-53

1994

บทคัดย่อ

'Golden Delicious' apples (Malus domestica Borkh.) were treated with heat or CaCl2 solutions or a combination thereof to determine the effects of these treatments on decay and quality of fruit in storage. Heat treatment at 38C for 4 days, pressure infiltration with 2% or 4% solutions of CaCl2, or a combination of both. with heat following CaCl2 treatment affected decay and firmness during 6 months of storage at 0C. The heat treatment alone reduced decay caused by Botrytis cinerea (Pers.:Fr.) by approximately 30%, while heat in combination with a 2% CaCl2 solution reduced decay by approximately 60%. Calcium chloride solutions of 2% or 4% alone reduced decay by 40% and 60%, respectively. Heat treatments, either alone or in combination with CaCl2 treatments, maintained firmness (80 N) best, followed by fruit infiltrated with 2% or 4% solutions of CaCl2 alone (70 N) and the nontreated controls (66 N). Instron Magness-Taylor and instron compression test curves show that heat-treated fruit differed qualitatively and quantitatively from nonheated fruit. Heat treatment did not increase the amount of infiltrated Ca bound to the cell wall significantly, and a combination of heat treatment after CaCl2 infiltration increased surface injury over those fruit heated or infiltrated with CaCl2 solutions alone.