大豆埃氏慢生根瘤菌Y63-1菌株培养基的筛选与优化
- Title:
- Screening and Optimization of Culture Medium for Bradyrhizobium elkanii Y63-1
- 关键词:
- 大豆根瘤菌; 埃氏慢生根瘤菌Y631; 培养基筛选; 培养基优化; 正交试验
- 摘要:
- 为了促进广谱高效大豆埃氏慢生根瘤菌Y631菌株的高效生产与推广应用,本研究对其培养基进行了筛选与优化。首先比较了Y63-1在YMA、TY、SM、PA和BSE 5种根瘤菌基本培养基中的生长速度,结果表明Y63-1在TY基本培养基中生长最快。以TY为基本培养基进行单因素碳源及无机盐利用试验,结果表明葡萄糖是Y63-1生长的最佳碳源,CaCl2为必要的培养基成分,Rh微量元素对菌株的生长有很大的促进作用。进一步对蛋白胨、葡萄糖、酵母粉及Rh微量元素4种组分进行正交优化,获得了适宜Y63-1生长的最佳培养基,配方(1 L)为:8 g蛋白胨、10 g葡萄糖、3 g酵母粉、0.1 g CaCl2·6H2O、3 mL Rh微量元素,pH7.0。此培养基也能显著提升USDA110的生长速率,可以广泛应用于慢生根瘤菌菌剂的大规模生产。
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备注/Memo
湖北省重点研发计划(2022BBA0036);国家自然科学基金面上项目(32071964)。