燕子掌不同发育时期内源激素含量变化研究  

Research on the Changes of Endogenous Phytohormones in Crassula agenten Thumb.from Flower Bud Differentiation to Germination Phases

作　　者：芦站根[1] 周文杰[1] 

机构地区：[1]衡水学院生命科学系,河北衡水053000

出　　处：《北方园艺》2008年第12期116-119,共4页Northern Horticulture

基　　金：河北省科技攻关资助项目(05220209)

摘　　要：为了分析和探讨内源激素对燕子掌(Crassulaagenten Thumb.)花芽分化和萌发中的作用,对花芽分化期至萌发期内源激素ZRs(玉米素核苷)、IAA(吲哚乙酸)、iPA(异戊烯基腺苷)、ABA(脱落酸)的含量变化进行了研究。结果表明:燕子掌花芽分化时期叶内的激素含量降低,芽内激素含量升高,其中相对高的ZRs和ZRs/ABA及iPA和iPA/ABA有利于分化,相对低的IAA和IAA/ABA也利于分化,其中ZRs和ZRs/ABA作用最大。燕子掌花芽萌发期也有较高的CTK、CTK/ABA比值和相对低的IAA、IAA/ABA比值,高而稳定的ABA含量可能是燕子掌生长缓慢而抗性强的内在因素之一。In this paper the Crassula agenten Thumb. was used as material for studying the changes of the contents of ZRs, IAA, iPA and ABA at the stages of flower bud differentiation and flowering, and the action of endohormone was analyzed and discussed. The results showed that there were decline of endohormone level in leaves and rise of endohormone level in flower bud in flower bud differentiation period. Relatively high levels of ZRs ,iPA content and ZRs/ABA ,iPA/ABA ratios benefited for its differentiation, and low level of IAA and IAA/ABA ratio also did same. Meanwhile the level of ZRs and ZRs/ABA ratio played great role in it. At germination phase, relatively high level of CTK and the ratio of CTK to ABA were needed, and low level of IAA and the ratio of IAA to ABA were needed so. The high and steady level of ABA possibly leads to its slow growth and high resistance.

关 键 词：燕子掌 花芽分化期 花芽萌发期 内源激素 

分 类 号：S793.9[农业科学—林木遗传育种]