Study on the Content Change Laws of Polysaccharide Accumulation with Fruit Growth in Zizyphus jujuba Mill cv.lingwuchangzao

Using spectrophotometer,3 years old Jujuba fruits,annual stems and leaves as materials,the Zizyphus jujuba Mill cv.lingwuchangzao fruit polysaccharide accumulation in different period of fruit growth were studied.The results showed that the polysaccharide content of the leaves at different developmental stages showed significant differences,but the content of the stem was not significant differences.The content of 'Lingwu changzao' polysaccharide was at lower in the earlier stage,and with the development of the fruit,it increased slowly.Near the mature stage,it increased sharply to the highest.The content was 12.33%.With the development of the fruit,the polysaccharide content in the exocarp and mesocarp was increased always.And it showed significant differences.The trends of the polysaccharide content in the endocarp both increased firstly and then decreased.It showed that the polysaccharide of 'Lingwuchangzao' was increased when fruit grew and expanded quickly,the content was highest when fruit was mature.The mesocarp were chieft issues which store and accumulate polysaccharide.The leaves and stem was important in the process of accumulating polysaccharide.