摘要
目的:为美花石斛种苗的规模化生产提供理论依据。方法:以将继代培养的美花石斛长至0.2~0.6 cm左右的丛生芽分割外植体,分别转入不同的培养基中。研究MS培养基浓度,激素(NAA)浓度对美花石斛组培苗生根的影响。结果:MS培养基的浓度对美花石斛组培苗生根影响较大,组培苗在1/2 MS培养基中有明显的促进作用。在培养基中添加激素(NAA)对美花石斛组培苗生根有很大的促进作用,随着激素(NAA)浓度的增加,组培苗生根率越高,当NAA增加到0.7 mg/L时达到86%,再增高会出现生长缓慢,叶变枯黄。结论:当培养基配方为1/2MS + 0.7 mg/L时,美花石斛组培苗生根及生长效果最佳。
Objective: The effect of different culture medium formulas on Dendrobium loddigesii root culture was studied to provide theoretical basis for the standardization production. Method: We investi-gated the effect of media components on the induction of shoot regeneration for different types of explants to research the effect on taking root for Dendrobium loddigesii. Results: The media com-ponents have a great influence on taking root. And 1/2 MS medium can obviously promote rooting. And with the increasing of NAA, the rooting rate rises. But when the NAA increased to 0.7 mg/L, and the rooting rate reached 86% and then increased again, there will be a slow growth with the leaves turning yellow. Conclusion: The best culture medium formula is 1/2 ms + 0.7 mg/L NAA for Dendrobium loddigesii to take root and grow.
出处
《微生物前沿》
2015年第1期6-10,共5页
Advances in Microbiology
基金
贵州省科技厅项目(黔科合J字[2013]2246号)
贵州师范学院博士启动基金项目(12BS028)。
