บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Involvement of oxidative stress in chilling injury in cold-stored mandarin fruits

Jose M. Sala

Postharvest Biology and Technology Vol: 13 Issue: 3 Pages: 255-261

1998

บทคัดย่อ

Involvement of oxidative stress in chilling injury in cold-stored mandarin fruits

The involvement of oxidative stress in chilling injury (CI) of cold-stored mandarin fruits was studied. Changes in activated oxygen scavenging enzymes, superoxide dismutase (EC 1.15.1.1.), catalase (EC 1.11.1.6), ascorbate peroxidase (EC 1.11.1.11) and glutathione reductase (EC 1.6.4.2) during low-temperature storage were examined. No symptoms of CI occurred in cold-stored fruits of `Clemenules' and `Clementine' cultivars. In `Nova' and `Fortune' cultivars, CI increased sharply after 4 weeks at 2.5°C and the peel surface was severely damaged. Superoxide dismutase activity increased during cold storage in both chilling-sensitive and -tolerant cultivars. However, catalase, ascorbate peroxidase and glutathione reductase activities were higher in tolerant cultivars (`Clemenules' and `Clementine') at low temperature. These results indicate that oxidative stress may be involved in cold-induced peel damage of harvested citrus fruit. Chilling-tolerant mandarin cultivars may have a more efficient antioxidant enzyme system.