Effect of ethylene levels at harvest on 1-methylcyclopropene (1-MCP) efficiency and chilling injury sensitivity of plum
Mohamed Ben Amor
Abstracts Book, 6th International Postharvest symposium, 8-12 April 2009, Antalya, Turkey. 256 pages.
2009
บทคัดย่อ
Six cultivars of plum were harvested at commercial maturity stage. These varieties were chosen according to their levels of ethylene production during ripening. Fruits were treated with 1-MCP at 650 nL.L-l for 24 hours at 5°C. After treatment, all fruit was stored at 1°C. Fruit were removed from cold storage at 15 days intervals, and transferred to 20°C for 7 days shelf life.The. degree of response of the fruit to 1-MCP treatments was evaluated by the degree of delaying the loss of firmness and color changes during holding at 20°C. Here we reported that the effects of 1-MCP on plum depend mainly on the levels of ethylene produced by fruit before application. In cultivars that exhibited low ethylene level higher values of firmness were observed in 1-MCP-treated plums compared with control. However, cultivars displayed high levels of ethylene at harvest, showed lower response to 1-MCP treatment and are more affected by chilling injury (CI), a major physiological storage disorder in plums. This variation in chilling injury sensitivity in relation to ethylene production may be useful in breeding cultivars with improved storage life at low temperatures.