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试验以１１～１２年生元帅系苹果（Ｍａｌｕｓｐｕｍｉｌａ）五龙红为材料，研究了果形剂处理对苹果幼果早期生长特性及内源细胞分裂素水平等方面的影响，结果表明：果形剂处理显著提高了果实的座果率；促进了幼果的早期生长；尤其显著地促进了果实萼端发育，使五棱突起明显。幼果早期生长发育过程中，果形指数逐渐下降，但处理果的果形指数始终比对照果的高。对果实萼端与胴部内源细胞分裂素的测定结果表明，盛花后前３周内，对照果与处理果的ＺＲｓ及ｉＰＡ含量均很低，至第４周，处理果萼端的ＺＲｓ含量急剧增加达含量高峰，为对照果的２０倍之多；萼端ｉＰＡ含量也表现出类似的趋势。胴部的ＺＲｓ和ｉＰＡ含量变化不如萼端明显，后期以处理果中含量较高。对果实萼端组织显微结构的观察发现，果形剂处理后细胞数量和细胞体积均比对照果的大，但细胞数量比细胞体积增加的多。可见，果实萼端的增大主要是通过细胞数量的增本研究为中国博士后科学基金资助项目稿件修回日期：１９９８－０６－３０加实现的。这与萼端具有高含量的细胞分裂素有关。
The experiment was conducted to investigate the effect of fruiting agents on early growth characteristics and endogenous cytokinin levels of young apple trees from 11 to 12 years old Malus Pumila Wulong Hong. The results showed that: Significantly increased the rate of fruit set fruit; Promote the early growth of young fruit; In particular, significantly promote the development of calyx fruit, Pentagon prominence. During the early growth and development of young fruit, the fruit shape index gradually decreased, but the fruit shape index of treated fruit was always higher than that of the control fruit. The results of endogenous cytokinin analysis of calyx and body showed that the content of ZRs and iPA in control fruits and treated fruits were very low in the first 3 weeks after flowering. By the 4th week, the content of ZRs in calyx side increased sharply Peak content reached 20 times as much as the control fruit; calyx side iPA content also showed a similar trend. The changes of ZRs and iPA contents in body part were not as good as those in calyx end, but higher in the latter part. Observations on the microstructure of the calyx side of the fruit revealed that the amount of cells and the cell volume of fruit calluses were larger than that of the control fruits after treatment, but the number of cells increased more than the volume of the cells. Can be seen that the fruit calyx side of the increase is mainly through the increase of the number of cells The research for the China Postdoctoral Science Foundation funded project manuscript Date of repair: 1998-06-30 plus achieve. This is related to the calyx end with a high content of cytokinin.