บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Physiological and biochemical studies during fruit ripening in litchi (Litchi chinensis Sonn.).

Nagar, P. K.;

Postharvest Biology and Technology Year: 1994 Vol: 4 Issue: 3 Pages: 225-234 Ref: 30 ref.

1994

บทคัดย่อ

Physiological and biochemical studies during fruit ripening in litchi (Litchi chinensis Sonn.).

ABSTRACT :

 

Mature red-coloured litchi (cv. Calcuttia) fruits were dipped in Alar [daminozide] (50, 100 or 200 mg/litre) or cobaltous chloride (25, 50 or 100 mg/litre) containing 0.2% Tween-20 for 2 min within 2 h of harvesting. Control fruits were dipped in water with 0.2% Tween-20. Treated and control fruits were air dried and stored for 2, 4, 6 or 8 days under ambient conditions (25-25 deg C, 80% RH). Alar and cobaltous chloride treatments (particularly Alar at 100 mg/litre and cobaltous chloride at 50 mg/litre) significantly reduced physiological weight loss during storage and delayed the decrease in ascorbic acid content which occurred during storage. Total soluble solids and sugar content increased in treated and control fruits up to the 4th day of storage and decreased thereafter. Pectinmethylesterase [pectinesterase] activity was higher in control fruits than in treated fruits and was higher in fully ripe fruits than in overripe fruits. Treated fruits had lower levels of peroxidase, cellulase and re

spiratory activity than control fruits. The results suggest that Alar and cobaltous chloride extend the shelf life of litchi fruits by reducing the rate of oxidative metabolism and pectin hydrolysis.