不同温度处理对石斛兰花芽分化和发育的影响

[目的]准确了解石斛兰花芽分化规律,研究不同的温度处理对春石斛兰花芽分化和发育的影响,为石斛兰的花期调控提供技术支持。[方法]采用石蜡切片法观察了石斛兰(Dendrobium Spring Snow)花芽的形态发生和结构发育过程,研究了26/21℃、22/17℃、18/13℃处理条件下花芽分化和发育的差异性。[结果]研究表明:石斛兰花芽分化过程可分为7个时期:休眠期、萌动期、花序原基分化期、花蕾原基分化期、萼片原基分化期、花瓣原基分化期、合蕊柱分化期。在高温26/21℃处理条件下,石斛兰不能进行花芽分化,22/17℃处理条件下,需要56d才能完成花芽分化,在18/13℃条件下,35d能够完成花...

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Published in林业科学研究 Vol. 30; no. 3; pp. 460 - 464
Main Author 郑宝强 邓茜玫 李奎 缪崑 王雁
Format Journal Article
LanguageChinese
Published 国家林业局林木培育重点实验室,中国林业科学研究院林业研究所,北京 100091%中国花卉协会,北京,100714 2017
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ISSN1001-1498
DOI10.13275/j.cnki.lykxyj.2017.03.014

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Summary:[目的]准确了解石斛兰花芽分化规律,研究不同的温度处理对春石斛兰花芽分化和发育的影响,为石斛兰的花期调控提供技术支持。[方法]采用石蜡切片法观察了石斛兰(Dendrobium Spring Snow)花芽的形态发生和结构发育过程,研究了26/21℃、22/17℃、18/13℃处理条件下花芽分化和发育的差异性。[结果]研究表明:石斛兰花芽分化过程可分为7个时期:休眠期、萌动期、花序原基分化期、花蕾原基分化期、萼片原基分化期、花瓣原基分化期、合蕊柱分化期。在高温26/21℃处理条件下,石斛兰不能进行花芽分化,22/17℃处理条件下,需要56d才能完成花芽分化,在18/13℃条件下,35d能够完成花芽分化。[结论]持续足够时间的低温是花芽分化的关键,萌动期是一个对温度高度敏感的时期,此时至少经历2周的低温,能够形成花芽,经历高温,则形成高芽。花芽形成后温度高有利于花芽的发育。
Bibliography:Dendrobium ; temperature ; flower bud ; morphological differentiation
ZHENG Bao-qiang1, DENG Xi-mei2 , LI Kui1 , MIAO Kun1, WANG Yah1 (1. Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China; 2. China Flower Association, Beijing, 100091, China)
11-1221/S
[ Objective] To understand the rule of Dendrobium flower bud differentiation and study the effects of tem- perature treatment on flower bud differentiation and development, so as to provide technical support for the regula- tion of Dendrobium flowering. [ Method] The process of flower bud differentiation and development was observed by the method of paraffin cut and the difference was studied under the conditions of 26/21℃ , 22/17℃and 18/13℃ [ Result] The results showed that the flower bud differentiation process could be divided into 7 phases: dormant phase, germination phase, inflorescence primordium differentiation phase, flower differentiation phase
ISSN:1001-1498
DOI:10.13275/j.cnki.lykxyj.2017.03.014