ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Molecular species profile of membrane lipids of tomato pericarp during chilling.

L'Heureux, G. P.; Bergevin, M.; Thompson, J. E.; Willemot, C.;

Acta Horticulturae Year: 1993 Issue: No. 343 Pages: 286-287

1993

บทคัดย่อ

Cold storage of mature-green tomato (cv. Caruso) fruits at 1 deg C for 22 days resulted in chilling injury symptoms which developed only after rewarming. Electrolyte leakage, as an indirect measure of membrane damage, was determined during storage of fruits at 20 or 1 deg and after transfer of fruits to 20 deg for 4 days following 14 or 18 days at 1 deg . Electrolyte leakage was shown to increase during cold storage. Changes in molecular species composition of phospholipids during cold storage and after rewarming were also determined. The main molecular species of phosphatidylcholine was not affected during cold storage or after rewarming. However, during cold storage the minor molecular species shifted significantly towards increased unsaturation. This trend was only partly reversed during rewarming. The presence of these polyunsaturated species and their breakdown products may have induced membrane destabilization and dysfunction upon returning the fruits to ambient temperature.