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以室温贮藏条件的“海沃德”猕猴桃为试验材料,研究将果实置于50cm和80cm高度,然后自由跌落至水泥地面后果实生理特性的变化。研究结果表明,损伤处理加快了果实的呼吸代谢水平,刺激乙烯大量生成。损伤越严重,对呼吸代谢和乙烯释放的促进效果越明显。损伤处理能激发猕猴桃果实活性氧物质O2-.和H2O2快速增加,进而诱导保护酶活性提高。损伤处理提高了果实的LOX酶活性,加速了细胞膜脂降解而致细胞结构的损坏,进一步加快膜脂过氧化进程,MDA大量积累,衰老进程加快。
The “Hayward” kiwifruit stored at room temperature was used as experimental material to study the changes of physiological characteristics of fruits after they were dropped to the height of 50cm and 80cm and then dropped freely to the concrete floor. The results showed that injury treatment accelerated the metabolism of fruit and stimulated the production of ethylene. The more severe the injury, the more obvious the promotion effect on respiratory metabolism and ethylene release. Damage treatment can stimulate kiwifruit fruit reactive oxygen species O2- and H2O2 rapid increase, thereby inducing protective enzyme activity increased. Damage treatment increased the LOX activity of fruits, accelerated the degradation of cell membrane lipids, damaged the cell structure, accelerated the process of membrane lipid peroxidation, accumulated a large amount of MDA and accelerated the aging process.