环剥对枣树叶片中淀粉积累及激素浓度的影响

环剥是目前促进枣树坐果的主要技术措施之一。试验研究了花期环剥和非花期环剥对枣树叶片营养物质及激素的影响。结果表明,枣树环剥对光合产物通过韧皮部向下运输造成的阻碍作用并不能显著提高叶片中可溶性糖含量,但是能够起到积累光合产物的作用,其积累形式主要是淀粉;这些积累的光合产物在花期会被花、幼果等库器官消耗;枣树花期环剥影响叶片内源激素的水平,可显著提高叶片内赤霉素浓度,对生长素及脱落酸影响不明显。

Influence of Girdling Induced Starch Accumulation and Auxin Concentration in Jujube Leaves

Girdling is currently one of the main technical measures on promotion of fruit development in Chinese jujube. The results of the study on effects of girdling at flowering stage to leaf nutrients and auxin were as follows： Girdling on jujube, one of the main techni- cal measures impeding photosynthetic products transported down through the phloem impediment did not result in significant improve- ment in leaf soluble sugar content levels, but it could play a major role in the accumulation of photosynthetic products, which were accu- mulated mainly in the form of starch; And these accumulated photosynthetic products would be consumed by flowers, young fruit and oth- er sink organ. Girdling at jujube full bloom induced significantly increasing concentrations of the GA in leaves, but influence on IAA and ABA was not so remarkable in this experiment. Girdling is currently one of the main technical measures on promotion of fruit development in Chinese jujube. The results of the study on effects of girdling at flowering stage to leaf nutrients and auxin were as follows： Girdling on jujube, one of the main techni- cal measures impeding photosynthetic products transported down through the phloem impediment did not result in significant improve- ment in leaf soluble sugar content levels, but it could play a major role in the accumulation of photosynthetic products, which were accu- mulated mainly in the form of starch; And these accumulated photosynthetic products would be consumed by flowers, young fruit and oth- er sink organ. Girdling at jujube full bloom induced significantly increasing concentrations of the GA in leaves, but influence on IAA and ABA was not so remarkable in this experiment.