1984年对以“新世纪”和“八云”品科授粉的黄花梨果实分别测定内源赤霉素(GAs)和细胞分裂素类(CTK)物质的含量。在授粉后25天,CTK的含量达到高值,而GAs则在授粉后70天左右达到高峰。而且由不同品种授粉的果实在发育进程中的内源激素含量有明显差异,当GAs和CTK含量达到高峰或大值时,新世纪授粉的果实所含之GAs和CTK量比八云授粉的约高一倍,作者认为这种结果可能是引起果实大小差异的内在原因,本文还对果实发育与激素的关系及果实直感进行了讨论。 In 1984, the contents of endogenous gibberellins (GAs) and cytokinins (CTKs) were measured on pear fruits pollinated by “New Century” and “Yakumo”. At 25 days after pollination, CTK levels reached high levels, whereas GAs peaked at around 70 days after pollination. Moreover, the content of endogenous hormones during the development of fruits pollinated by different varieties was significantly different. When GAs and CTK contents reached the peak or the maximum value, the GAs and CTK contents of the pollinated fruits in the new century were higher than that of the Yakumo pollination Doubled, the author believes that this result may be caused by the size of the fruit of the underlying causes, this article also fruit development and hormone relationship and fruit sense of straightness are discussed.