3种石斛属植物假鳞茎高位腋芽的萌发初探

Preliminary Study on Three Plants' Pseudobulbs Keikis Sprouting of Dendrobium

对比分析3种具有重要药用价值的石斛属植物高位腋芽萌发情况,为石斛种苗营养繁殖提供参考。方法:采集扁草石斛Dendrobium nobile Lindl.、铁皮石斛Dendrobium officinale Kimura et Migo和齿瓣石斛Dendrobium devonianum Paxt.等3种石斛假鳞茎,观察高位腋芽萌发率和生长情况。结果:扁草石斛、铁皮石斛和齿瓣石斛的茎条高芽萌发率分别为93.7%、74.2%、83.3%;茎节萌发率分别为26.4%、15.8%、16.1%;高芽生长情况齿瓣石斛>扁草石斛>铁皮石斛。结论:3种石斛均具有典型高位腋芽萌发特性,随着当前市场石斛假鳞茎成本降低,利用其高位腋芽繁育种苗具有较好的发展前景。

Objective：To contrastively analyze keikis sprouting conditions of three important medicinal plants of Dendrobium,and provide a reference for the seedlings vegetative propagation of Dendrobium.Methods：collecting pseudobulbs of Dendrobium nobile Lindl.,Dendrobium officinale Kimura et Migo and Dendrobium devonianum Paxt.,observing growth and calculating keikis sprouting rate.Results：the stems’ keikis sprouting rate of Dendrobium nobile Lindl.,Dendrobium officinale Kimura et Migo,Dendrobium devonianum Paxt.was 93.7%,74.2% and 93.7%,respectively;the stem nodes’ keikis sprouting rate of them was 26.4%,15.8% and 26.4%,respectively;growth of keikis showed：Dendrobium devonianum Paxt.〉 Dendrobium nobile Lindl.〉 Dendrobium officinale Kimura et Migo.Conclusion：Three plants all possess typical keikis sprouting features.With the cost reduction of Dendrobium pseudobulbs in current market,it has a broad prospect to breeding seedlings by pseudobulds.