اثر متيل جاسمونات و متيل ساليسيلات در كاهش سرمازدگي و پوسيدگي ميوه هاي گريپ فروت مارش و پرتقال تامسون توليد شده در شمال و جنوب ايران

Effect of Methyl Jasmonate and Methyl Salicylate in Reducing Chilling Injury and Decay in Marsh Grapefruit and Thompson Navel Orange Produced in North and South of Iran

Many citrus fruits of different cultivars become injured when exposed to low, but higher then freezing temperatures. In this study, the role of methyl jasmonate and methyl salicylate on reducing chilling injury and decay incidence in grapefruit and Thompson navel orange harvested from North and South parts of Iran (with different climates) was investigated. The results indicated that the grapefruit and Thompson navel orange produced from southern part of Iran (with higher daily temperatures) is more susceptible to chilling injury and decay when stored in low temperatures. The study also demonstrated that there is a considerable difference between north and south produced citrus fruits as for internal quality. Response of treated fruits to low temperature storage, demonstrated that there is a significant differences between qualities of treated, and untreated control fruits. Grapefruit and navel orange fruits treated with 24 nL.L"1 of methyl jasmonate and methyl salicylate had the minimum chilling injury and decay incidence after 6 and 8 weeks of storage in 2ʹC.