【摘要】 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。更多还原

【Abstract】 Chemical Characters of tissure micrography and observation of scanning election micro scope showed the distribution and dynamics of sugar fat and lipids were aloes related to cold resistance.During the dormancy period most of the starch wire disappeared on cmabium layer.The starch of hard species disappeared completely,content of sugar were high fat and lipids were concentrated cambium layer.After the dormancy in spring,the sugar,fat disappeared quickly,starch accumulated gain.The droped degree of sugar and fat of the hardy species was lower than that of the no-resistance species.更多还原