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研究了苹果开花过程中花药、幼果（花托和子房）和贮藏花粉内源腐胺（Put）、亚精胺（Spd）、精胺（SPin）的含量变化及外源3种多胺对花粉萌发、雌蕊寿命和坐果的影响。结果表明：在开花过程中，花药中3种多胺的含量逐渐降低，花粉中的含量在贮藏期间和荫芽率同步降低；3种多胺浴液浸泡的花粉，其萌发率和花粉管长度极显著提高和增长；从蕾期到第一次生理落果，幼果多胺含量呈下降趋势，但受精幼果比未受精幼果的下降速度缓慢；第一次生理落果期，幼果内源多胺含量降到最低点；用3种外源多胺喷布花蕾，均延长了雌蕊寿命，增强了受精能力，提高了坐果率。
The changes of the content of Put, Spermine and SPin in anther, young fruit (receptacle and ovary) and stored pollen in apple blossom were studied, and the effect of exogenous three polyamines on pollen Germination, pistil life and fruit setting. The results showed that the content of three polyamines in anther decreased gradually during anthesis, and the contents of pollen in the pollen decreased synchronously with the rate of bud budding. The pollen germination rate and pollen tube length Significantly increased and increased; from the bud to the first physiological drop fruit, polyamine content of young fruit decreased, but the rate of decline of fertilized young fruit than unripe young fruit was slow; the first physiological deciduous period, young fruit endogenous Polyamine content dropped to the lowest point; with three kinds of exogenous polyamines spray buds are extended pistil life, enhanced fertilization, improve the rate of fruit set.