草酸处理减轻杧果采后果实冷害的机理研究

被引:25
作者
薛锡佳
李佩艳
宋夏钦
沈玫
郑小林
机构
[1] 浙江工商大学食品与生物工程学院
关键词
杧果; 果实; 草酸; 低温胁迫; 冷害;
D O I
10.16420/j.issn.0513-353x.2012.11.020
中图分类号
S667.7 [芒果];
学科分类号
摘要
杧果(Mangifera indicaL.)‘Zill’果实采后经5mmol·L-1草酸溶液浸泡10min后,在低温(10±0.5)℃下贮藏27d,再移至常温25℃贮藏4d,冷害系数和质膜相对透性显著低于对照;草酸处理降低了果实在贮藏后期的呼吸速率和乙烯释放速率,抑制了多酚氧化酶(PPO)和过氧化物酶(POD)活性,维持了较高果肉亮度值(L*),可溶性固形物(SSC)、游离脯氨酸和柠檬酸含量。说明草酸处理可提高质膜稳定性,抑制褐变相关酶活性以及维持一些渗透调节物质含量来增加采后果实的抗冷性,缓解果实冷害症状。
引用
收藏
页码:2251 / 2257
页数:7
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