高级检索+

湖北花楸种胚离体培养与快繁技术研究

Embryos Culture and Rapid Proliferation of Sorbus hupehensisc. K. Schneid.

  • 摘要: 为建立湖北花楸组培快速繁育技术体系,以湖北花楸种胚为外植体,研究不同植物生长调节剂对种胚萌发、茎段增殖和芽苗生根的影响。结果表明,湖北花楸种胚在MS+0.5 mg/L 6-BA+0.05 mg/L IBA+30 g/L蔗糖+7 g/L卡拉胶中萌发并正常生长,平均萌发率可达95%,远高于未添加激素培养基组合的平均诱导率(5%),诱导培养基中的胚正常生长,30 d时可萌发出多片真叶和腋芽;带芽茎段转入MS+0.25 mg/L 6-BA+0.04 mg/L IBA+30 g/L蔗糖+7 g/L卡拉胶中增殖培养30 d,平均每茎段诱导出2.08个芽苗,增殖率490.5%;若带芽茎段转入MS+0.5 mg/L 6-BA+0.04 mg/L IBA+30 g/L蔗糖+7 g/L卡拉胶中增殖培养30 d,平均每茎段诱导出4.1个芽,增殖率291%;芽苗在MS+0.5 mg/L NAA+30 g/L蔗糖+7 g/L卡拉胶中培养30 d,生根率可达84%,芽苗基部通过愈伤再生方式诱导产生不定根,平均每芽苗诱导出4.41条根。

     

    Abstract: The effects of different plant growth regulators on seed embryo germination, stem segment proliferation and seedling rooting were studied in order to establish tissue culture rapid breeding technology system of Sorbus hupehensisc. K. Schneid.. The results showed that the seed embryos of Sorbus hupehensisc. K. Schneid. were in MS+0.5 mg/L 6-BA+0.05 mg/L IBA+30 g/L sucrose+7 g/L carrageenan germination and normal growth, of which the average germination rate was 95%, much higher than the average induction rate of 5% without hormone medium combination, induced normal growth of embryos in the medium, 30 days after the germination of multiple true leaves and axillary buds. Stem segments with buds were transferred to MS+0.25 mg/L 6-BA+0.04 mg/L IBA+30 g/L sucrose+7 g/L carrageenan for 30 days, and 2.08 buds were induced per stem segment, with a proliferation rate of 490.5%. If stem segments with buds were transferred to MS+0.5 mg/L 6-BA+0.04 mg/L IBA+30 g/L sucrose+7 g/L carrageenan for 30 days, 4.1 buds were induced per stem segment on average, and the proliferation rate was 291%. The seedlings were cultured in MS+0.5 mg/L NAA+30 g/L sucrose+7 g/L carrageenan for 30 days, and the rooting rate reached 84%. Adventitic roots were induced at the base of the sprouts by callus regeneration, and an average of 4.41 roots were induced per sprout.

     

/

返回文章
返回