彩叶凤梨离体培养中外植体消毒及防止褐化的研究
2015-10-21史华平王彦尊王计平
史华平 王彦尊 王计平

摘要
[目的]研究彩叶凤梨离体培养过程中外植体消毒及褐化的防止措施。 [方法]以彩叶凤梨幼苗茎段作为外植体材料,研究其消毒和褐化防止问题。[结果]减少培养基中无机盐浓度,外植体选用0.1%升汞溶液消毒10 min,并在MS诱导培养基中添加200 mg/L的抗坏血酸,能够有效防止褐化,而且不影响愈伤组织的进一步分化。[结论]研究结果为彩叶凤梨离体培养奠定基础。
关键词 彩叶凤梨;离体培养;外植体;消毒;褐化
中图分类号 S188 文献标识码
A 文章编号 0517-6611(2015)03-047-03
Studies on Disinfection and Antibrowning during the Tissue Culture of Neoregelia carolinae
SHI Huaping1, WANG Yanzun2, WANG Jiping2*
(1. Pomology Institute, Shanxi Academy of Agricultural Sciences, Taigu, Shanxi 030815; 2.College of Agronomy, Shanxi Agricultural University, Taigu, Shanxi 030801)
Abstract [Objective] The aim was to study disinfection and antibrowning during the tissue culture of Neoregelia carolinae.
[Method ] In this experiment, with the seedling stems of Neoregelia carolinae as explants, study on the problems in disinfection and browning of Neoregelia carolinae tissue culture was carried out. [Result]Results showed that the explant browning could be alleviated by reducing the salt concentration of medium and explants treated with 0.1% HgCl2 for 10 min during in vitro culture. Results also showed that the medium supplemented with 200 mg/L Vc could prevent browning effectively, and did not produce bad effects on growth of Neoregelia carolinae explants.[Conclusion] The study provided basis for tissue culture of Neoregelia carolinae.
Key words Neoregelia carolinae; Tissue culture; Explant; Disinfection; Browning
基金项目 山西省科技攻关项目(20130311019-2);國家自然科学基金项目(31201266)。
作者简介 史华平(1974- ),男,山西昔阳人,助理研究员,从事植物组织培养技术研究。*通讯作者,副教授,博士,从事植物生理与分子生物学研究。
收稿日期 20141205
彩叶凤梨(Neoregelia carolinae)又名赪凤梨、五彩凤梨,为凤梨科彩叶凤梨属植物。原产于巴西,无明显休眠期,喜温暖、湿润和阳光充足的环境,不耐寒,怕干燥和强光暴晒[1]。我国彩叶凤梨的栽培时间不长,从20世纪80年代开始进入引种阶段,至今仅有小批量的生产,主要集中在广东、海南、福建和云南昆明等地。
彩叶凤梨通常以分株、播种繁殖为主,时间限制十分明显,而且生长缓慢,繁殖率低,且苗不整齐,通过植物组织培养技术可以大大提高其繁殖率[1-2],短期内获得大量整齐一致的种苗,因此通过组织培养快速繁殖凤梨是一条很理想的途径。然而,在离体培养过程中,首先遇到的是外植体严重褐化而导致培养物死亡的问题,笔者针对该问题,对彩叶凤梨离体培养过程中外植体消毒及褐化的防止措施进行了研究。……
