根癌农杆菌介导sHSP基因对半夏的遗传转化

目的:建立高效的半夏遗传转化体系.方法:以半夏试管苗的叶柄为外植体,采用根癌农杆菌介导法,探索了酚类物质、农杆菌菌液浓度、侵染时间、预培养时间及共培养时间等对半夏遗传转化效率的影响.结果与结论:不经过预培养阶段,用含AS 40 mg·L-1的根癌农杆菌菌液侵染15 min后共培养3d时可有效提高遗传转化效率.将转化后的叶柄接到含有100 mg·L-1 Kan和350 mg·L-1Carb的分化培养基上进行筛选培养,30 d左右在叶柄的两端分化出抗性的试管小块茎.对抗性转化植株进行Gus染色和PCR检测,结果表明外源基因sHSP已经整合到半夏基因组中.

Genetic transformation of Pinellia ternata with Agrobacterium tumefaciens-mediated sHSP genes

Objective: To establish an efficient genetic transformation system of Pinellia ternata. Method: With petioles from test-tube seedlings of P.ternata as explants, Agrobacterium tumefaciens mediation method was adopted to explore the effect of phenolic substances, A. tumefaciens's concentration, infection time, pre-incubation time and co-cultivation time on genetic transformation efficiency of P. ternata. Result and Conclusion: The genetic transformation efficiency could be effectively enhanced by infecting in A. tumefaciens culture containing AS 40 mg·L^-1 for 15 min for three days. The petioles were put into the differentiation medium containing 150 mg·L^-1 Kan and 350 mg·L^-1 Carb to screening and cultivation. After around 30 days, microtubers could be observed at both sides of the petioles. Gus staining and PCR verification on the regenerated plants showed that the exogenous gene sHSP had been integrated into genome of P. ternata.