雷公藤不定根培养体系的建立及中试放大研究

以MS为基本培养基,进行雷公藤不定根的诱导研究时发现,不论是以雷公藤幼叶还是以幼叶诱导的愈伤组织为外植体,在添加1.0 mg·L^-1 IBA的培养基上均可以诱导出不定根并建立良好的不定根培养体系;以雷公藤愈伤组织建立的悬浮细胞在添加2.0~4.0 mg·L^-1 NAA时,也可以形成不定根并建立稳定的不定根培养体系,雷公藤不定根的3个培养体系中雷公藤甲素含量均超过自然生长的根皮中的含量,其中AR3不定根中雷公藤甲素含量最高,为根皮的5.3倍。在使用5 L发酵罐进行中试放大培养时,与250 mL摇瓶培养相比,每升培养基不定根增长量、次生代谢产物含量差异不大,这为通过组织培养生产雷公藤次生代谢产物奠定了基础。

Establishment of adventitious root culture system and scale-up fermentation of Tripterygium wilfordii

Using MS as basic medium, supplemented with 1.0 mg·L^-1 IBA, the adventitious roots of Tripterygium wilfordii were induced, and the good adventitious root culture system was established by leaves or callus induced by leaves as explants. The adventitious roots were also induced with 2.0-4.0 mg·L^-1 NAA and the good adventitious root culture system established by using suspension cells from callus as materials to induce adventitious root. The content of triptolide of three adventitious roots culture system were exceeded in the natural root bark. The content of triptolide of AR3 adventitious roots was the highest about 5.3 times as that in the natural root bark. By using 5 L stirred fermentor during pilot enlarge cultivation, compared with 250 mL flask cultivation, the adventitious roots increment and secondary metabolites content per liter medium showed no significant difference. The accomplishment of this analysis laid a foundation by tissue culture production of the secondary metabolites of T. wilfordii.