Abstract: Antirrhinum majus seedlings hypocotyls, 20 mm in length, cut into three segments, which were cultured on MS medium and MS medium added with BA and NAA. The results indicated that adventi-tious buds and roots formation were higher in the basal hypocotyl segments than in the two upper hypocotyl segments. When the basal hypocotyl segments were cultured on the medium with different concentration of BA and NAA, the result was that the morphogenetic response was much better with BA and NAA supple-mented. The most optimum concentration was BA 1.Omg/L + NAA 0.15mg/L.

Key words: Antirrhinum majus

摘要： 金鱼草(Antirrhinum majus L.)下胚轴不同部位段的形态发生能力有很大差异。在外源添加BA，NAA的情况下，金鱼草下胚轴近基部切段培养物的芽、根发生明显高于其上各部位切段，以近基部切段为外植体培养时，其形态发生能力以BA和NAA配合为好，最适剂量为BA 1.0 mg/L+NAA0.15mg/L.

关键词: 金鱼草, 胚轴切段, 不定芽, 根的发生