关键词: 纽荷尔脐橙, 留树贮藏, 低温贮藏

Abstract: Newhall navel orange(Citrus sinensis ‘Newhall’) fruits stored on-tree and at low temperature were used to study the storage effects of different storage methods. The flesh firmness, total difference of colors, active oxygen species(AOS), content of prolin(Pro) in one gram FW, relative of electric conductivity, the content of malondialdehyde (MAD), and the activity of lipoxygenase(LOX), superoxide dismutase(SOD), catalase(CAT) were determined in the peel and pulp of fruit. We observed that during the storage the flesh firmness dropped, the total difference of colors and the activity of LOX raised, the activity of SOD, CAT descended, AOS, MDA, Pro accumulated, resulting in the injury of membrane of fruit cell, the flowage of substance in cell and rising of the relative of electric conductivity. It meant that the injury degree of fruit cells was increasing during storage of the two methods. And the injury did not result from just one factor, but the interaction of these factors. The comparison of the two methods showed that, there were no significant difference in the first 47 storage days, but during the storage of 47d to 75d, there was obvious superiority of the fruit from storage on-tree, no matter what the appearance (flesh firmness and total difference of colors) and the integrity of cell membrane. So the storage on-tree had more superiority than storage at low temperature of both economizing of cost and improvement of the fruit.

Key words: Citrus sinensis ‘Newhall’, storage on-tree, storage at low temperature