机械损伤对猕猴桃果实生理与膜脂过氧化的影响  

Influnce of Damages on Kiwifruits of Physiological Index and Membrane Lipid Peroxidation

作　　者：唐燕[1] 张继澍[1] 

机构地区：[1]西北农林科技大学生命学院,陕西杨凌712100

出　　处：《中国食品学报》2012年第4期140-145,共6页Journal of Chinese Institute Of Food Science and Technology

基　　金：国家自然科学基金项目(30471001)

摘　　要：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。In this study, The Kiwi of ＇Hayward＇ kiwifruit falling from a height of 50 cm and 80 cm onto a smoothly marble floor was treated as the material to investigate the effects of injury on the change of physiological index. The results showed that： with the condition of storage at room temperature, the injury treatment was increasing respiration intensity and ethylene production rate; moreover, the speed of respiration production and ethylene production were more quickly with the higher level of injury treatment; damage treatment can quickly stimulate the increasing of active oxygen substances of 0^2·. and H202 of kiwi, then protective enzyme activity were increasing with the increasing of 0^-2· and H2O2; damage treatment can increase the activity of enzyme of LOX, then accelerate the process of membrane lipid peroxidation; the process of aging was faster due to the increase of LOX and accumulation of MDA.

关 键 词：猕猴桃 机械损伤 果实生理 膜脂过氧化 

分 类 号：S663.4[农业科学—果树学]