鼓槌石斛种子萌发培养与小苗组培快繁技术研究（英文）

目的]利用鼓槌石斛蒴果,通过无菌播种萌发发育成苗及小苗快繁技术试验研究,从而获得大量种苗。方法]用鼓槌石斛种子通过无菌播种获得大量原球茎,分别转接到4组不同的诱导芽培养基上,筛选出鼓槌石斛最适合小苗分化和成长的培养基,以其设置以N6为基本培养基,添加浓度均为1.0、1.5、2.0mg/L的NAA和IAA,筛选最适合鼓槌石斛小苗生根壮苗培养基。结果]将鼓槌石斛种子在MS＋6-BA1mg/L＋10%香蕉汁＋20g/L蔗糖＋6g/L琼脂＋1g/LAC培养基上进行培养种子,种子萌发率达90%以上;最利于原球茎分化的培养基为N6＋NAA2mg/L＋BA0.5mg/L＋10%香蕉汁＋20g/L蔗糖＋0.5g/L牛肉蛋白胨＋5.8g/L琼脂＋0.5g/LAC,培养出的苗整齐度高,均匀;最佳生根壮苗培养基为N6＋NAA1.5mg/L＋10%香蕉汁＋20g/L蔗糖＋5.8g/L琼脂＋1g/LAC,苗生根数多、粗壮、整齐,叶浓绿。结论]该研究结果为鼓槌石斛快速繁育技术提供了参考。

Sterile Germination of Dendrobium chrysotoxum Seeds and Rapid Propagation of Its Plantlets

Objective] This study was to produce plant seeds on a large scale via sterile germination of the capsules of Dendrobium chrysotoxum and rapid propagation technique.Method] A large amount of protocorm-like bodies produced from the sterile germination of D.chrysotoxum capsules,were transferred to four different kinds of bud induction media to obtain the optimal media suitable for plantlet differentiation and growth;and then with N6 as basic medium,1.0,1.5 and 2.0 mg/L of NAA and IAA were tested to obtain the optimal media suitable for rooting.Results] On the medium of MS appended with 1 mg/L 6-BA ＋10% banana puree ＋ 20 g/L sucrose ＋6 g/L agar＋1 g/L AC,seed germination rate was up to 90%.The optimal medium for differentiation of D.chrysotoxum protocorm-like bodies was N6＋ 2 mg/L NAA ＋ 0.5 mg/L 6-BA ＋10% banana puree ＋ 20 g/L sucrose ＋ 0.5 g/L peptone ＋ 5.8 g/L agar ＋0.5 g/L AC,grown from which the plantlets were even and orderly in height;and the optimal medium for rooting was N6＋1.5 mg/L NAA ＋10% banana puree ＋ 20 g/L sucrose ＋ 5.8 g/L agar ＋1 g/L AC,grown from which the plantlets developed more,robust and orderly roots,and their leaves were in dark green color.Conclusion] Our results provided reference for the rapid propagation of D.chrysotoxum.