长春花毛状根培养及抗癌生物碱产生的研究

目的:建立长春花毛状根转化体系,从毛状根中获得生物碱。方法:用发根农杆菌A₄和R₁₀₀₀菌株分别感染长春花的不同外植体获得毛状根,并对毛状根的培养条件进行优化。结果:采用A₄感染叶片,分别预、共培养2d及添加100mg·L^-1的乙酰丁香酮(A_s)可得到最佳转化效果,毛状根的诱导率达86.25%。以蔗糖为碳源及以水解乳蛋白为氮源的1/2MS培养基为毛状根的最佳生长条件。检测结果表明,毛状根中的总生物碱含量高于长春花的原植株和愈伤组织。结论:可通过毛状根的培养来获得抗癌生物碱长春碱和长春新碱等。

A study on the hairy root culture and antitumor alkaloids production of Catharanthus roseus

OBJECTIVE: To establish transformation system and obtain alkaloids from the hairy root of Catharanthus roseus. METHOD: Hairy roots were obtained by infecting the different explants of C. roseus. Culture conditions of hairy root were optimized. RESULT: The best transformation condition was leaf infected by two-day's pre-culture and two-day's co-culture and additional A(S) (hydroxyacetosyringone) 100 mg x L(-1). The inducing rate of hairy root was up to 86.25%. The best condition of hairy root culture was MS medium with sucrose as carbon material and lactalbumin as nitron material. The analysis result showed that the contents of total alkaloids in hairy roots were higher than explants and calli. CONCLUSION: Hairy root of C. roseus will be useful for the production of active components in C. roseus.