摘要
通过对石蒜(Lycoris radiata)鳞茎芽的解剖观察,研究了石蒜在花芽分化过程中内源激素含量的动态变化,分析了内源激素与核酸变化的相关性。结果表明:花芽形态建成期中,IAA、ABA在孕育期,GA在雄蕊形成期,ZR在雌蕊形成期依次出现峰值从而引起核酸峰值的出现,表明4种内源激素调控了核酸的代谢,且IAA,ABA在花芽分化进程中起主要作用。研究发现高水平的ABA/GA有利于花芽孕育和花芽形态的分化;高水平的IAA/ZR及ABA/ZR有利于花芽形态分化,但不利于雌雄蕊的形成。由此说明在花芽分化过程中4种内源激素的含量此起彼伏发生着激烈的变化,最终达到平衡状态,花芽分化完成。
The dynamic changes of endogenous hormone content during flower bud differentiation were studied in Lycoris radiata while the bulb was anatomized. The relationship between the endogenous hormones and nucleic acid＇ s content was analysed. The results showed that the peak of endogenous hormones content was IAA,ABA in former differentiation stage, GA in forming for stamen and ZR in forming for pistil in flower bud morphogensis. The nucleic acid content peak followed. It presented endogenous hormones regulated nucleic acid metabolism progress. IAA and ABA were the most important facts in flower bud differentiation progress. The high ratio of ABA to GA accelerated both forming differentiation and development of flower bud formation. High ratio of IAA to ZR and ABA to ZR accelerated flower bud formation,but it went against stamen and pistil formation. All these showed that the content of the four endogenous hormones varied remarkably and achieved a balance at the end. The flower bud differentiation was finished at the end.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第4期67-70,共4页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
国家林业局"948"引进项目(98-4-07)
关键词
石蒜
花芽分化
内源激素
核酸
Lycoris radiata
Flower bud differentiation
Endogenous hormone
Nucleic acid
