桃果实采后贮藏过程中细胞壁多糖的变化(英文)

被引:14
作者
金昌海
索标
阚娟
王红梅
汪志君
机构
[1] 扬州大学食品科学与工程学院
关键词
细胞壁多糖; 单糖组成; 桃; 采后贮藏; 果实软化;
D O I
暂无
中图分类号
S662.1 [桃];
学科分类号
摘要
以‘雨花三号’水蜜桃果实为试材,分别在5°C(低温)和20°C(常温)贮藏一段时间后,研究桃果实采后细胞壁多糖降解、硬度以及乙烯释放速率的变化特征。结果表明,乙烯释放高峰明显滞后于果实采后硬度的快速下降期。不同温度下贮藏过程中果实细胞壁多糖变化的对比表明,低温抑制了细胞壁果胶和细胞壁其余组分的变化,从而抑制了果实的软化。富含半乳糖醛酸的果胶主链断裂。果胶和细胞壁其余组分也发生了半乳糖和阿拉伯糖等中性糖的损失,说明果胶和细胞壁其余组分的增溶及其侧链中性糖的降解也是桃果实采后软化的重要因素,这可能是由多种相关多糖降解酶的作用所导致的。但半纤维素多糖中中性糖的降解对桃果实采后软化的进程并没有影响。
引用
收藏
页码:657 / 664
页数:8
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