ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Chilling injury in plants and fruits: some possible causes with means of amelioration by manipulation of postharvest storage conditions.

Graham, D.;

Proceedings of the international congress of plant physiology, New Delhi, India, 15-20 February 1988. Volume 2. Year: 1990 Pages: 1373-1384 Ref: 39 ref.

1990

บทคัดย่อ

Chilling sensitivity in plants of tropical and subtropical origin is defined and the major symptoms of chilling injury are briefly described. An outline is given of 2 likely causes of chilling sensitivity which lead to chilling injury. The first involves physical changes in certain membrane lipids, particularly phosphatidylglycerols, which result in changes in membrane properties and eventual disorganization of cellular compartmentation. The second cause is due to the impairment of the catalytic function of certain key enzymes of metabolism, of which phosphoenol pyruvate carboxylase is an example. Some effects of low non-freezing temperatures on kinetic properties of this enzyme are described. Some ways to avoid or minimize chilling injury during storage of fruits are described. In particular, conditions for long term (6-8 weeks) storage of bananas at ambient temperatures under controlled atmospheres with ethylene absorption are described which avoid chilling injury. Banana is unique in its ability to store under such conditions. Manipulation of storage conditions of mango fruits at temperatures as low as 1 deg C, including the use of polyethylene bags to create a modified atmosphere, stepwise reduction of storage temperature or intermittent warming during storage, enabled extension of postharvest life for up to 5 weeks with minimal losses. The interaction of temperature, ripening and postharvest pathology in extending postharvest life is briefly discussed.