Technology Research of Plantlets Rooting and Transplanting on Tissue Culture of Ilex centrochinensis

Plantlets of Ilex centrochinensis were used in its tissue culture to study the effect of auxin and gibberellin in vitro rooting, and the effect of various matrix in transplanting rooted plantlets and in rooting outside the tube. The highest fre- quency of rooting was obtained when growth regulator combination was IBA 0.2 mg/L ＋ GA3 0.4 mg/L in vitro rooting, and when the ratio of sand and humus soil was 5 to 5 in rooting outside the tube. When the ratio of perlite and peat soil was 3 to 7, the highest survival of rooted plantlets in transplanting was obtained. This study may provide the basis for improving the factory system of tissue culture of llex centrochinensis.

不同消毒方式对华中枸骨组织培养的影响

[目的]考察不同消毒方式对华中枸骨组织培养的影响。[方法]以华中枸骨的带芽新梢茎段为外植体,分顶芽和侧芽,研究乙醇、升汞的作用时间以及吐温的用量对外植体消毒的影响。[结果]华中枸骨新梢顶芽的最佳消毒方式为:浓度75%乙醇作用50 s,浓度0.1%升汞作用6 min,Tween-80 1滴;侧芽的最佳消毒方式为:浓度75%乙醇作用50 s,浓度0.1%升汞作用7 min。[结论]该方法优化了华中枸骨组织培养的消毒方法,为华中枸骨的进一步开发利用提供依据。

不同外植体及冷藏处理对华中枸骨组织培养的影响

[目的]研究不同外植体及冷藏处理对华中枸骨组织培养的影响。[方法]以华中枸骨带芽新梢茎段为外植体,考察外植体的取材时间、部位以及4℃冷藏处理对其初代培养的影响。[结果]华中枸骨以带芽的新梢茎段作为外植体进行组织培养时,以春季采取植株中上部枝条为宜,其中春季萌条的芽增殖倍数可达到4,中上部萌条的芽萌动率可达到45%。适当的冷藏处理对外植体的消毒以及芽的萌动有利,4℃冷藏处理14 h后的消毒成功率最高,可达到92%;冷藏处理22 h的芽萌动率最高,可达到18%。[结论]华中枸骨组织培养中外植体最好于春季选取植株中上部萌发的新梢顶芽;华中枸骨芽的萌动率随冷藏时间的增加呈线性增长,可能与低温打破休眠有关。