间歇升温对芒果冷害及生理生化反应的影响

Effects of Intermittent Warming on Chilling Injury and Physiological and Biocchemical Responses of Mango Fruits

对低温贮藏中的芒果进行间歇升温处理，结果表明：间歇升温处理延迟了２℃贮藏果冷害引起的乙烯释放及呼吸强度的上升，延迟了果皮多胺水平的上升，使果皮的ＳＯＤ活性维持在较高水平，细胞膜透性增加缓慢，从而显著提高了芒果的抗冷害能力。但间歇升温处理使１０℃贮藏果乙烯释放高峰及呼吸高峰提前且峰高增加，果皮ＳＯＤ活性降低，果皮细胞膜透性增大，从而促进了芒果的成熟衰老。

The effects of intermittent warming during cold storage of mango fruits on chilling injury and physiological and biocchemical responses were studied. The results indicated that intermittent warming delayed the chilling induced increase of both ethylene production and respiration rate of mango fruits stored at 2℃, delayed the increase of polyamines level of pericarp,maintained these polyamines at high level in later stage,maintained SOD activity of pericarp at higher level, retarded the increase of membrane permeability and increased the ability of mango fruits to withstand chilling injury. But intermittent warming promoted the ethylene production and respiration rate of mango fruits stored at 10℃ and the peak of ethylene production and respiration rate occurred earlier and higher,so it resulted in lower SOD activity of pericarp and accelerated the ripening and senescence of mango fruits.