兴安百里香茎芽增殖途径的植株再生
2019-06-07魏晓雪姜明月张文天吕跃东张妍妍
魏晓雪 姜明月 张文天 吕跃东 张妍妍



摘 要:为探索野生兴安百里香组织培养最佳培养条件获得完整再生植株,以五大连池野生兴安百里香为研究对象,研究外植体类型、消毒时间和培养基种类对兴安百里香茎芽增殖与微枝生根的影响。结果表明:带腋芽茎段为兴安百里香组培的最佳外植体,采用质量浓度0.1%升汞浸泡4 min的方法消毒效果最佳;最适愈伤组织诱导培养基为MS+6-BA1.0 mg/L+2,4-D0.5 mg/L+蔗糖30 g/L+瓊脂粉6 g/L;最适茎芽增殖培养基为MS+6-BA1.0 mg/L+2,4-D0.5 mg/L;最适微枝生根培养基为MS+6-BA 1.0 mg/L+2,4-D 0.8 mg/L。此研究结果为通过工厂化育苗技术培育野生兴安百里香优质观赏苗木奠定了基础。
关键词:兴安百里香;带芽茎段;组织培养;再生体系
中图分类号:S573.9 文献标识码:A 文章编号:1006-8023(2019)04-0022-06
Plant Regeneration of the Stem Bud Proliferation Pathway of Thymus dahuricus
WEI Xiaoxue1, JIANG Mingyue1, ZHANG Wentian1, LV Yuedong2, ZHANG Yanyan2*
(1. Institute of Volcanoes and Mineral Springs, Heilongjiang Academy of Science, Wudalianchi 164155; 2.Forestry Research Institute of Heilongjiang Province, Harbin 150040)
Abstract:In order to explore the optimal culture conditions for wild Thymus dahuricus tissue culture to obtain a complete regenerated plant, we studied the effects of explant type, disinfection time and medium variety on stem bud proliferation and microbranched rooting of Thymus dahuricus with Wudalianchi wild Thymus dahuricus. The results showed that: the best explants for tissue culture of Thymus dahuricus were axillary bud stem segment. The best disinfection effect was achieved by soaking for 4 min with a mass concentration of 0.1% mercury. The best medium for callus induction was: MS+6-BA1.0 mg/L+2,4-D0.5 mg/L+ saccharose 30 g/L+ powdered agar 6 g/L. The most suitable medium for stem-bud multiplication was: MS+6-BA1.0 mg/L+2,4-D0.5 mg/L. The best medium for rooting of microtwigs was: MS+6-BA 1.0 mg/L+2,4-D 0.8 mg/L. The results laid a foundation for the cultivation of high quality ornamental seedlings of wild Thymus dahuricus by means of industrial seedling raising technology.
Keywords:Thymus dahuricus; stem with axillary bud; tissue culture; regeneration system
0 引言
百里香属(Thymus)植株具有强烈的芳香气味,其花茎叶可提取芳香油,是重要的芳香和药用植物,也可作为观赏、环保以及蜜源植物[1-3]。百里香芳香油是重要的天然香料,具有一定的商业价值,广泛应用于化妆品、医疗、保健和食品等方面,具有广阔的开发前景[4-8]。
一般百里香主要来自野生资源,人们对百里香精油的需求量与日俱增,野生资源不能满足需要,而且很快会导致野生资源的枯竭,故需要开展人工栽培。目前,百里香的人工栽培主要依靠种子育苗,但种子育苗易受病毒浸染,导致种性退化,产量和品质下降,不能适应规模化和标准化生产的需要,因此前人进行了大量百里香属的组织培养技术研究[9-10]。
以往有关百里香属组织培养试验中,主要研究了不同品种、不同外植体、培养基及生长调节剂对丛生芽的诱导和生根的影响[10-16]。……
