บทคัดย่องานวิจัย

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Limitation to the use of electrolyte leakage for the measurement of chilling injury in tomato fruit.

Cote, F.; Thompson, J. E.; Willemot, C.;

Postharvest Biology and Technology Year: 1993 Vol: 3 Issue: 2 Pages: 103-110 Ref: 19 ref.

1993

บทคัดย่อ

Limitation to the use of electrolyte leakage for the measurement of chilling injury in tomato fruit.

Fruits of 5 tomato cultivars were tested for tolerance to chilling. After exposure for varying times to chilling at 3 deg C, the fruits were returned to ambient temperature (20 deg ) for development of chilling injury symptoms (uneven ripening and pitting). Chilling injury during exposure to 3 deg and at 20 deg was determined as electrolyte leakage by measuring electrical conductivity of the leachate from pericarp discs, an indirect measure of membrane damage. During chilling, electrolyte leakage significantly increased in the 3 sensitive cultivars (H722, UC82 and H9023), but not in the tolerant cultivars (Trend and Vedette), correlating with the development of chilling injury symptoms after transfer to ambient temperature. However, this correlation broke down after transfer to ambient temperature. While electrolyte leakage significantly increased at 20 deg in slightly injured fruits, it was greatly reduced in extensively injured fruits. It is concluded that electrical conductivity of tissue lea

chate, which is widely used for assessment of chilling injury, is not always a reliable measure of chilling injury or of electrolyte leakage and membrane damage.