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作者用‘金星’(Tompkin＇s King)苹果为材料,于六月落果前后及六月落果期间,定期采样,分别从果肉和种子内提取酸性乙醚溶解物质,并用小麦胚芽鞘切段垂直生长法测定其活性。结果表明,在苹果六月落果期间,除种子内生长促进物质活性明显降低外,果肉中生长抑制物质的累积,与果实生理脱落表现出明显的平行关系。全部实验结果认为:苹果果实脱落是由于一定发育阶段上的种子产生生长促进物质的能力处于低峰期时,向果肉内输入的生长促进物质减少,在量上不足以拮抗由果旁叶在一定季节内向果肉中输入的与脱落相关的生长抑制物质所致。
The authors used ’Tompkin’s King’ apples as materials to collect samples of acidic ether dissolved from pulp and seeds, before and after the fall of June and during the fall of June, respectively. The plants were cut vertically with wheat germ sheath The activity was measured. The results showed that during the fall of apple in June, the accumulation of growth inhibitory substances in fruit flesh obviously showed a parallel relationship with the fruit physiological exfoliation, except that the activity of growth promoting substances in seeds was obviously decreased. All the experimental results show that the loss of apple fruit is due to the ability of the seed to produce growth-promoting substance at a certain developmental stage at a low peak, and the reduction of growth-promoting substances input into the pulp is insufficient in quantity to antagonize the effect of the by- Due to the exfoliation-related growth inhibitory substances entered into the flesh during the season.