摘要
为进一步了解修剪反应的生理基础,以‘富士’苹果(Malus×domestica Borkh.)3年生幼树为试材,在萌芽期研究不同修剪方式(短截、拉枝、刻芽、环刻)对1年生枝条不同部位芽中内源激素含量的影响。结果表明,未处理对照幼苗下部芽中生长素(IAA)和脱落酸(ABA)含量显著高于上部芽,玉米素核苷(ZR)和赤霉素(GA3)含量明显低于上部芽。与对照相比,短截处理降低了枝条中部和下部芽中IAA和ABA的含量,相反,拉枝处理显著增加了枝条中部和下部芽中IAA和ABA的含量。另外,短截处理虽然提高了枝条中部和下部芽中GA3和ZR含量,但未能改变枝条中部和下部芽中自身存在的含量分布梯度,而拉枝完全改变了枝条不同部位芽中自身存在的含量分布梯度。刻芽和环刻后芽体组织中GA3、ZR、IAA等生长促进激素含量明显提高,而生长抑制激素ABA含量下降,刻芽打破了芽体中原有激素之间的平衡。
To understand the physiology of pruning responses,we studied the effects of various pruning methods（cutting back,branch-bending,bud-notching and girdling）on the endogenous hormones of young Fuji apple（Malus × domestica Borkh.）buds. Results showed that endogenous hormones in buds at the different positions of the branches were significantly different. Buds at the basal parts of the branch contained higher IAA and ABA content,and cytokinins and gibberellin content in the buds at the distal parts of the branch was significantly higher than basal parts. Compared with control group,cutting back treatment decreased IAA and ABA content in the buds at the middle and proximal parts of the branch. Contrary to cutting back,branch-bending increased IAA and ABA content. In addition,cutting back treatment increased GA 3 ,ZR contents in the buds at the middle and basal parts of the branch,but fail to change the intrinsic distribution gradient of hormone in the different parts of the branch. Branch-bending,on the other hand,totally changed the intrinsic distribution gradient of hormone in the different parts of the branch. Bud-cutting treatment broke the original balance between endogenous hormones in the buds, growth promoting hormones such as IAA,GA 3 ,ZR increased significantly,and the growth inhibiting hormone ABA levels decreased.
出处
《园艺学报》
CAS
CSCD
北大核心
2013年第8期1437-1444,共8页
Acta Horticulturae Sinica
基金
国家自然科学基金项目(31200543)
关键词
苹果
短截
拉枝
刻芽
内源激素
修剪
apple
cutting back
branch-bending
bud-notching
endogenous hormones
pruning
