蔗糖浓度在 0～ 5 0 mg/g的范围内 ,甘薯茎尖分生组织培养均可成苗。随着蔗糖浓度的增加 ,诱导成苗率呈钟形曲线。最适范围为 2 0～ 30 mg/g,在此范围内甘薯茎尖分生组织诱导成苗率达 80 %以上 Sucrose concentration in the range of 0 ~ 50 mg / g, sweet potato shoot tip meristem can be planted. With the increase of sucrose concentration, the rate of seedling emergence was bell-shaped curve. The optimum range was 20 ~ 30 mg / g. Within this range, the shoot emergence rate of sweetpotato shoot apical meristem reached more than 80%