Different types of explants including leaves,stems,petioles obtained from sweet potato Simon 1 were respectively infected by Agrobacterium rhizogenes strain A4.

• 用发根农杆菌A4分别感染药用甘薯西蒙1号的叶片、茎切段、叶柄等外植体,诱导出毛状根,并对毛状根进行了离体培养。