以叶下珠Phyllanthus urinaria带节茎段为外植体,研究生长调节剂浓度、培养基对茎段诱导芽的影响,再以叶下珠无菌芽为材料,开展丛生芽增殖培养、生根培养和炼苗移栽技术研究。结果表明,适合叶下珠茎段诱导芽的培养基为1/2MS + 6-BA 2.0 mg·L-1 + IBA 0.2 mg·L-1 + 琼脂7.5 g·L-1 + 蔗糖30 g·L-1 + 活性炭0.5 g·L-1 (pH 5.8~6.0),诱导率达100%;适合叶下珠芽增殖的培养基为1/2MS + 6-BA 1.0 mg·L-1 + IBA 0.2 mg·L-1 + 琼脂7.5 g·L-1 + 蔗糖30 g·L-1 (pH 5.8~6.0),平均增殖倍数为3.8;生根适宜培养基为1/2MS + IBA 0.5 mg·L-1 + 琼脂7.5 g·L-1 +蔗糖20 g·L-1 (pH 5.8~6.0),生根率达100%;最佳炼苗时间为闭盖2 d后开盖3 d,移栽成活率86.6%。
Using stem-segment with node of Phyllanthus urinaria as explants, effects of different culture medium and hormones on induction of P. urinaria were analyzed. Using germ-free shoots as material, proliferation, rooting, acclimatization and transplant of P. urinaria were studied. The results showed that the combination of 1/2MS + 6-BA 2.0 mg·L-1 + IBA 0.2 mg·L-1 + agar 7.5 g·L-1 + sucrose 30 g·L-1 + activated carbon 0.5 g·L-1 (pH 5.8—6.0) was the optimal medium for buds induction with induction rate of 100%; the optimum for multiple shoots was the combination of 1/2MS + 6-BA 1.0 mg·L-1 + IBA 0.2 mg·L-1 + agar 7.5 g·L-1 + sucrose 30 g·L-1 (pH 5.8—6.0) and the average multiplication coefficient was 3.8; It was best to rooting under the condition of 1/2MS + IBA 0.5 mg·L-1 + agar 7.5 g·L-1 + sucrose 20 g·L-1 (pH 5.8—6.0) and the rooting rate was 100%. After closing cap 2 d and then opened cap 3 d to practice seedlings and transplant, surviving of tube plantlet rates could reach 86.6%.
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