四种添加物对铁皮石斛原球茎生长及多糖含量的影响

Effect of Four Additives on Growth and Polysaccharide Content of Dendrobium officinale Protocorm-like Bodies

摘要:

为探讨铁皮石斛（Dendrobium officinale）培养基中添加物的作用，在1/2MS 培养基中加入椰肉、甘蔗渣、香蕉皮和麦麸等4种添加物，研究不同浓度添加物和培养时间对原球茎生长和多糖含量的影响。结果表明，4 种添加物对铁皮石斛原球茎的增殖、分化和多糖含量均有一定影响，其中添加15.0 g L^-1 甘蔗渣，培养60 d 能明显促进铁皮石斛原球茎的增殖与分化（146.1%）；而添加20.0 g L^-1 甘蔗渣，培养40 d 能显著提高铁皮石斛原球茎多糖含量（50.4%）。这说明甘蔗渣是培养铁皮石斛原球茎的适宜添加物，既能促进铁皮石斛原球茎的生长发育，还能降低生产成本。

Abstract:

In order to understand the function of additive in medium of Dendrobium officinale, four additives, including coconut meat, sugarcane bagasse, banana peel and wheat bran, were supplied in 1/2MS medium, respectively. The effects of additives with different concentrates and culture time on growth and polysaccharide content of D. officinale PLBs were studied. The results showed that the PLBs proliferation, differentiation and the polysaccharide content were influenced by four additives. The proliferation rate of PBLs reached up to 146.1% supplemented with 15.0 g L^-1 sugarcane bagasse and cultured for 60 d. The polysaccharide content of PLBs was increased for 50.4% supplemented with 20.0 g L^-1 sugarcane bagasse and cultured for 40 days. So it was suggested that sugarcane bagasse was suitable additive for in vitro D. officinale PLBs owing to promote the growth of D. officinale PLBs and reduce cost of production.