空气凤梨Tillandsia bergeri花芽分化时期叶片内源激素含量的变化  

Changes of Endogenous Hormone Content in Leaves of Tillandsia bergeri During the Flower Bud Differentiation Period

作　　者：王姗[1] 张荣良 郝霞 鲍华鹏[1] 

机构地区：[1]江苏农林职业技术学院,江苏句容212400 [2]江苏绿苑园林建设有限公司,江苏句容212400 [3]南京红山森林动物园,南京210000

出　　处：《中国农学通报》2013年第22期142-146,共5页Chinese Agricultural Science Bulletin

基　　金：江苏省科技计划项目(BM2012608)

摘　　要：以Tillandsia bergeri为试材,研究T.bergeri在花芽分化过程中体内激素及其平衡的动态变化过程。用植物生长调节剂乙烯利进行整株喷洒处理,以喷施清水为对照。测定叶片内ZRs、GAs、IAA和ABA的含量。结果表明:外源乙烯利对植株有明显的催花作用,且乙烯利处理后出花整齐,外源乙烯利处理初期使IAA和GAs含量下降,在花器官发育时,GAs含量上升。在花芽诱导时期,ABA和ZRs含量升高;在花器官发育时期,ABA和ZRs激素含量恢复到正常水平。低水平的IAA及GAs含量促进T.bergeri花芽的诱导,而相对高的IAA及GAs含量有利于花形态的形成。较高水平的IAA/GAs、ABA/GAs、ZRs/GAs和低水平IAA/ZRs有利于T.bergeri的花芽诱导和萌动;激素平衡在T.bergeri花芽诱导期起到了关键作用。Tillandsia bergeri was chosen as subjects, changes of endogenous hormone content in leaves of T. bergeri during the flower bud differentiation period were studied. The concentration of endogenous hormones, ZRs, GAs, IAA and ABA in the leaves were detected. Experiment results showed that exogenous ethephon had significant effect on flowering of T.bergeri, and increased its tidiness substantially. External ethephon treatment reduced the concentration of IAA and GAs, and increased the content of GAs in the development of floral organs. In the flower bud induction period, the content of ABA and ZRs increased. In floral organ development period, the content of ABA and ZRs hormone levels recovered to normal level. The process of flower buds induction could be promoted by low concentration of IAA and GAs, while high concentration of IAA and GAs was conducive to the formation of flower morphology. High concentration of IAA/GAs, ABA/GAs, ZRs/GAs and low concentration of IAA/ZRs was conducive to the flower bud induction and germination of T.bergeri. Hormone balance played a key role in the flower bud induction period of T. bergeri.

关 键 词：铁兰属 空气凤梨 花芽分化 激素 乙烯利 

分 类 号：Q945.64[生物学—植物学]