论文部分内容阅读
组织显微化学特性以及扫描电镜观察显示 ,越冬期间 ,梨枝条组织细胞中淀粉粒、还原糖及脂类物质的分布、数量和转化程度与抗寒性密切相关。主要表现为冬季休眠期淀粉粒大量水解 ,还原糖含量增加 ,脂类物质向形成层密集。其中 ,抗寒种类淀粉粒小且水解彻底 ,还原糖含量高 ,脂类物质在形成层处高度聚集。解除休眠后 ,淀粉重新累积 ,还原糖、脂类物质含量减少 ,且抗寒种类淀粉粒增加的数量少 ,还原糖、脂类物质下降辐度也低于不抗寒种类。
Microstructure and scanning electron microscopy showed that during winter, the distribution, quantity and transformation degree of starch grains, reducing sugars and lipids in pear shoots were closely related to cold resistance. Mainly as a large amount of starch grain during dormancy during winter dormancy, reducing sugar content increased, lipid-based substances to form a dense layer. Among them, the cold type of starch granules is small and hydrolysis is complete, reducing sugar content, lipid accumulation in the formation of highly concentrated. After dormancy was removed, starch accumulation, reducing sugar, lipid content decreased, and the amount of cold-resistant starch granules increased less, reducing sugar, lipids descent degree is also lower than the non-cold type.