大葱花芽分化过程中内源激素的变化

园艺学报 ›› 2007, Vol. 34 ›› Issue (3): 671-676.

大葱花芽分化过程中内源激素的变化

苏　华¹ ;徐　坤^1*;刘　伟^1,2

(¹ 作物生物学国家重点实验室, 山东农业大学, 山东泰安271018;² 新疆农业大学园艺学院, 乌鲁木齐830052)

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-06-25 发布日期:2007-06-25

Changes of Endogenous Hormones During the Process of Flower Bud Differentiation of Welsh Onion

SU Hua¹;XU Kun^1*
;LIU Wei^1,2

(¹State Key Laboratory of Crop Biology, Shandong Agricultural University, Taipan, Shandong 271018, China; ²Department ofHorticulture, Xinjiang Agricultural University, Urumqi 830052,China)

Received:1900-01-01 Revised:1900-01-01 Online:2007-06-25 Published:2007-06-25

摘要/Abstract

摘要： 为探讨激素与大葱花芽分化的关系, 研究了不同大葱品种花芽分化过程中植株根、假茎及叶
片内源激素的变化动态。结果表明, 大葱植株根、假茎及叶片ABA、GA₃、ZR的含量均在花芽分化基本完
成时达到高峰, 而IAA则至低谷, 且内源激素出现高峰或低谷的时间, 与不同品种花芽分化完成时间一
致, 表明测试激素均与花芽分化有密切关系。但不同器官内源激素含量高低及变化幅度显著不同, 其中叶
片ABA、GA₃及根系ZR含量较高, 且变化显著, 而IAA在根系及叶片中的含量及变化幅度差异较小, 但
显著高于假茎。大葱叶片ABA / IAA、ABA /GA₃均随花芽分化率的增加而显著升高, 花芽分化完成时达峰
值, 之后迅速降低, 说明叶片内源激素间的平衡关系, 在大葱的花芽分化过程中亦起着重要的调控作用。

关键词: 大葱, 花芽分化, 越冬栽培, 内源激素

Abstract: DifferentWelsh onion (A llium f istulosum L. ) varieties were used as materials to discuss the
relation between endogenous hormones and flower bud differentiation. The results showed that during the
p rocess of flower bud differentiation, the contents of abscisic acid (ABA) , gibberellin ( GA₃ ) and zeatin
( ZR) in the roots, cauloids and leaves ofWelsh onion peaked but indolylacetic acid ( IAA) decreased evi
dently when flower buds differentiation was basically comp leted, and the period of peak or valley of endoge
nous hormones appearing coincided with the time of flower bud differentiation comp leted, these indicating flow
er bud differentiation nearly connected with ABA, GA₃ , ZR and IAA. The contents and changing ranges of
endogenous hormones in different organs ofWelsh onion were significantly different, in which the contents and
changing ranges of ABA, GA₃ in leaves and ZR in roots were much more than that of the other organs, but
there was a little difference for that of IAA in roots and leaves. Further, ABA / IAA and ABA /GA₃ inWelsh
onion leaveswere obviously increasing along with the p rocess of flower bud differentiation, and peaked when
flower buds differentiation was basically comp leted, then decreased significantly, this illustrated the balance
between different endogenous hormones also p layed an important role in regulating and controlling flower bud
differentiation ofWelsh onion.

Key words: Welsh onion (Allium fistulosum L. ), Cultivation through winter, Flower bud differentiation, Endogenous hormone

苏　华;徐　坤;刘　伟;. 大葱花芽分化过程中内源激素的变化[J]. 园艺学报, 2007, 34(3): 671-676.

SU Hua;XU Kun;LIU Wei;. Changes of Endogenous Hormones During the Process of Flower Bud Differentiation of Welsh Onion[J]. ACTA HORTICULTURAE SINICA, 2007, 34(3): 671-676.

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