用含有矮生和不含矮生基因的8个小麦品种盆栽,定量浇以不同浓度的BR和GA_3,观察小麦初期生长反应。GA_3对供试品种芽鞘和叶的生长促进与矮生基因有关,即高杆种比矮杆种更敏感。BR对芽鞘的生长有促进作用,对叶的生长无明显影响,且均与矮生基因无关。GA_3既不促进各供试品种根的生长也不促进根的分化。BR在高浓度下对根的生长有明显抑制,但对某些品种初生根的发生具有促进作用。 Eight wheat cultivars, including dwarf and non-dwarf, were potted with different concentrations of BR and GA_3, and the initial growth response of wheat was observed. The growth of shoot sheath and leaf of GA_3 was related to the dwarf gene, that is, the high rod was more sensitive than the short rod. BR promoted the growth of buds and had no significant effect on the growth of the leaves, all of which had nothing to do with the dwarfing genes. GA_3 did not promote the root growth of all tested cultivars nor did it promote root differentiation. BR significantly inhibited the growth of roots at high concentrations, but promoted the occurrence of primary roots of some varieties.