玉竹初代培养最适条件的筛选
2017-06-10霍妍赵春莉
霍妍++赵春莉



摘要:以玉竹[Polygonatum odoratum (Mill.) Druce]的叶片、茎段以及根茎作为外殖体,采用不同灭菌方式进行灭菌,在不同基本培养基上进行培养,添加不同种类生长调节剂,分析其最适的初代培养条件。结果表明,最适灭菌方法为75%乙醇处理10 s配合0.1%升汞处理7 min,其污染率为13.3%。根茎作为外殖体有较高的诱导率,达到90.0%;在培养中,最适宜初代培养的基本培养基为MS,其诱导率为86.7%;最适宜根茎分化的生长调节剂为MS+1.0 mg/L 6-BA+0.5 mg/L NAA,其次为MS+1.0 mg/L 6-BA+0.5 mg/L IAA,其分化率分别为80%和62%。
关键词:玉竹[Polygonatum odoratum (Mill.) Druce];初代培养;根茎;组织培养
中图分类号:R282;Q813.1 文献标识码:A 文章编号:0439-8114(2017)09-1763-04
DOI:10.14088/j.cnki.issn0439-8114.2017.09.041
Screening of Optimum Conditions of Polygonayum odorayum (Mill.) Druce Primary Culture
HUO Yan,ZHAO Chun-li
(College of Horticulture,Jilin Agriculture University,Changchun 130118, China)
Abstract:Using Polygonatum odoratum(Mill.) Druce leaves,stem and rhizome as explants, and the explants were sterilized with different sterilization,incubated with different basic medium,in different types of additional hormone to investigate the optimum primary culture conditions. The results showed that the optimum method of sterilizing time and 0.1% corrosive sublimate 7 min with 75% alcohol 10 s,the pollution rate was 13.3%. Rhizome as explants had high induction rate,the induction rate was 90.0%. In culture,the most appropriate primary culture of basal medium was MS, the induction rate was 86.7%. Optimum hormone rhizome differentiation of 1.0 mg/L 6-BA+0.5 mg/L NAA,followed by 1.0 mg/L 6-BA+0.5 mg/L IAA,differentiation rate of 80% and 62%.
Key words: Polygonatum odoratum (Mill.) Druce; primary culture; rhizome; tissue culture
玉竹[Polygonatum odoratum (Mill.) Druce]為百合科多年生草本植物,别名尾参、玉参、铃铛菜、甜根草[1]。玉竹性微寒、味甘,具有润燥养阴、生津止渴的功效,治疗口渴咽干、肺胃阴伤、内热消渴的疗效[2]。玉竹的药用价值十分丰富,其提纯物能增强身体的免疫力,煎剂服用具有扩张血管、抗衰老、抗心肌缺血、抗肿瘤等作用。玉竹可以药食两用,园林中宜植于林下、林缘及建筑物遮阴处作为观赏地被植物,也可盆栽观赏[3-8]。因此,寻找玉竹快速的繁殖途径非常重要。
宁慧等[9]在玉竹组织培养与快速繁殖的研究中发现,其根状茎可作为愈伤组织诱导的外殖体,尤其具有潜伏芽的根状茎有利于玉竹愈伤组织的诱导。宋艳梅[10]等用花蕾和根茎作为外殖体研究发现,在玉竹愈伤组织的诱导中,6-BA、NAA、2,4-D均有利于愈伤组织的诱导和不定芽的分化。本研究以玉竹叶片、茎段及根茎作为外殖体,采用不同灭菌方式进行灭菌,不同的基本培养基进行培养,添加不同种类的生长调节剂,以探讨其最适的初代培养条件,为玉竹的组织培养提供参考。……
