【摘要】 对低温贮藏前的芒果进行外源腐胺处理的结果表明 ,2℃低温诱导了芒果内源多胺含量和乙烯释放量的增加 ,急剧地降低了果皮 SOD活性 ,导致 MDA含量和细胞膜透性持续升高。外源腐胺处理则增加了芒果内源多胺含量 ,减少了乙烯生成 ,使果皮 SOD活性维持在较高水平 ,MDA含量和细胞膜透性增加缓慢 ,从而延缓了冷害的发生。在 10℃下贮藏后期也出现一个乙烯高峰 ,果皮 MDA含量和细胞膜透性逐渐增大 ,这是芒果后熟过程中的正常生理变化更多还原

【Abstract】 The effects of exogenous putrescine (PUT)treatment on chilling injury of mango ( Mangifera indica L.)fruits in cold storage were studied in detail. The results indicated that the low temperature(2℃)induced the increase of the endogenous polyamines level and the ethylene production of mango fruits,significantly decreased SOD in pericarp,increased continuously the MDA content and the membrane permeability. The exogenous PUT increased the endogenous polyamines level,inhibited the ethylene production and maintained the SOD activity of pericarp at higher level,retarded the increase of the MDA content and the membrane permeability, and postponed the occurance of the chilling injury of mango fruits. The mango fruits in 10℃ storage also showed an ethylene peak,the MDA content and the membrane permeability of pericarp were gradually increased during storage, this is a normal physiological response of ripening.更多还原