不同激素处理对锦绣杜鹃开花时期的影响  

Effects of Different Hormone Treatments on Flowering Period of Rhododendron pulchrum Sweet

作　　者：陈娟[1] 王晖[1] 万若男 武小霞[1] 宋钰睿 项俊[1] 

机构地区：[1]黄冈师范学院生命科学学院/经济林木种质改良与资源综合利用湖北省重点实验室/大别山特色资源开发湖北省协同创新中心,湖北黄冈438000

出　　处：《湖北农业科学》2015年第15期3683-3685,共3页Hubei Agricultural Sciences

基　　金：经济林木种质改良与资源综合利用湖北省重点实验室开放基金项目(2013000503);黄冈师范学院2011年度产学研合作项目;黄冈师范学院实验教学示范中心大学生创新活动项目(zx1156;zx201334)

摘　　要：采用不同浓度的GA3、6-BA、KT、GA3+6-BA、GA3+KT处理锦绣杜鹃(Rhododendron pulchrum Sweet)花蕾,研究其对锦绣杜鹃花蕾形态指标、开花时期、开花质量的影响。结果表明,上述激素处理均可使花蕾发育进程显著加快,开花时期提前,花朵体积增大,但对花期长短没有影响或影响较小;其中,GA3+KT促进效果最好,1 500 mg/L GA3+15 mg/L KT可使开花提前45 d左右,其次为GA3+6-BA,1 500 mg/L GA3+15 mg/L 6-BA处理可使开花提前33 d左右,而这两种混合液处理效果都显著优于单纯GA3处理;促进效应还与激素的浓度有关,1 500 mg/L GA3促进效应显著优于1 000 mg/L GA3的处理,无论是混合液还是单纯GA3处理,1 500 mg/L GA3促进效应显著优于1 000 mg/L GA3的处理。结构的观察显示,GA3+KT混合液处理显著促进了子房的发育进程,使子房膨大速度加快,提前形成胚珠,并发育至成熟,但对花药的发育进程没有影响或影响不显著,开花后的花药不开裂、不散粉,花粉粒处于四分体时期。Different concentrations of GA3.6-BA.KT were used in the experiment to treat flower bud of Rhododendron pul- chrum Sweet,and then the effects on morphological indicators of flower bud, flowering time, flowering quality and anatomical structure of ovary and anther were studied. Results showed that the mixture of GA3 and KT （GA3＋KT for short） or GA3 and 6-BA （GA3＋6-BA for short） accelerated the development process of flower bud of R. pulchrum Sweet significantly,which re- suiting in a remarkable advancement of flowering period, but had little effect on the length of flowering time; the promoting effect of GA3＋KT was superior to GA3＋6-BA. The promoting effect of hormone was concentration-dependent, 1 500mg/L GA3 was superior to 1 000 mg/L GA3 on accelerating the development process of flower bud and flowering period. The dissection structures of ovary and anther revealed that GA3＋KT promoted the development of the ovary of R. pulchrum Sweet,but the anther and the pollen grain inside were immature when the flower came into bloom.

关 键 词：锦绣杜鹃(Rhododendron pulchrum Sweet) 激素 开花时期 花器官 发育 

分 类 号：S685.21[农业科学—观赏园艺] S482.8[农业科学—园艺学]