用 2 ,4_D与萘乙酸两种生长素的各 4种浓度诱导大豆未成熟子叶胚胎发生。结果表明 ,两种生长素均可诱导胚胎发生 ,并且胚胎发生率和平均胚数在两种生长素间无显著差异 ;品种在平均胚数上存在差异。高浓度的 2 ,4_D诱导胚胎发生效果好于低浓度 ,诱导率达 4 1 2 3%。同时 ,观察到诱导大豆未成熟子叶胚胎发生时 ,开始第一周高浓度的 2 ,4_D对胚胎发生有更重要的作用 Induction of immature cotyledon embryogenesis with 4, 4, and 4 naphthoacetic acid concentrations of both auxins. The results showed that both auxins could induce embryogenesis, and there was no significant difference in embryo frequency and average embryo number between the two auxins. There was a difference in the average number of embryos between cultivars. High concentrations of 2,4 D induced embryo effect is better than low concentration, the induction rate of 4 1 2 3%. In the meantime, it was observed that induction of soybean immature cotyledonary embryos at the beginning of the first week of high concentrations of 2,4 D on embryogenesis has a more important role