中亚苦蒿组培快繁方法

作者:罗丽; 刘志浩; 刘天睿; 赵玉洋; 周骏辉; 李晓琳; 袁媛
来源:分子植物育种, 2023, 1-10.

摘要

为建立蒿属外来药源中亚苦蒿的离体快繁体系,以中亚苦蒿带芽茎段为外植体,考察消毒方法、不同激素组合及浓度对中亚苦蒿丛生芽增殖、试管苗生根等影响。结果表明:中亚苦蒿带芽茎段的最佳消毒方法为75%乙醇消毒30 s后,再用0.1% HgCl2+0.08% Tween-80消毒10 min。以MS+0.5 mg/L NAA为培养基,建立了一步成苗快繁体系,可在28 d诱导成苗;建立的芽增殖-生根快繁体系,可在77 d诱导成苗,最佳芽诱导培养基是MS+4.5 mg/L 6-BA+0.30 mg/L NAA,芽诱导增殖系数20.72;最佳生根培养基是MS+0.3 mg/L IBA+0.06 mg/L NAA,生根率达94.44%;火烧土∶蛭石(3:1)和火烧土∶蛭石∶珍珠岩(3:1:1) 2种基质均适用于中亚苦蒿,经炼苗成活率高达100%。建立的2种中亚苦蒿的组培快繁体系,可显著缩短繁殖时间,降低繁殖成本,为中亚苦蒿的引种驯化、规模化繁育、种质资源保存及人工选育提供参考。

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