บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Temperature preconditioning affects glutathione content and glutathione reductase activity in chilled zucchini squash.

Wang, C. Y.;

Journal of Plant Physiology Year: 1995 Vol: 145 Issue: 1-2 Pages: 148-152 Ref: 23 ref.

1995

บทคัดย่อ

Temperature preconditioning affects glutathione content and glutathione reductase activity in chilled zucchini squash.

 

Pre-conditioning zucchini squash (Cucurbita pepo, cv. Elite) at 15 deg C for 2 d prior to storage at 5 deg reduced chilling injury and altered glutathione content and glutathione reductase activity. Storage at 5 deg without pre-conditioning resulted in a short-term (2-4 d) increase, followed by a decrease, of total glutathione (TG), the reduced form of glutathione (GSH), total non-protein thiol (NPSH), and glutathione reductase (GR) activity. In pre-conditioned squash, TG, GSH and NPSH contents increased comparatively more and remained higher than in unconditioned squash; GR activity was also higher in the pre-conditioned squash. The oxidized forms of glutathione (GSSG) and non-glutathione thiol contents were generally low in zucchini squash and changed only slightly throughout the storage. Consequently, a higher ratio of GSH:GSSG was found in the pre-conditioned squash than in the control squash. It is suggested that the protection of SH-containing enzymes against oxidation and the detoxificati

on of reactive oxygen species may be partly responsible for the improved storage quality of zucchini after temperature pre-conditioning.