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《South China Fruits》 2017-01
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Effect of Bud-notching and Branching Element Treatments on Endogenous Hormones in the Buds of Zaosu Pear

YAN Shuai;XU Kai;YUAN Jicun;CHENG Cungang;ZHANG Chenguang;ZHANG Shaoyu;HOU Guixue;ZHAO Deying;Research Institute of Pomology,Chinese Academy of Agricultural Sciences;  
Engraved buds and branching hormone treatments are important technical means in pear tree shaping.To explore the response mechanism of endogenous hormone during engraving bud and exogenous hormones treatment,effects of different bud engraving ways and branching element treatments on the changes of endogenous hormone contents in lateral bud of biennial Zaosu pear were studied.The results showed that branching element treatments can improve the contents of IAA,GA and ZR and inhibit the increase of abscisic acid(ABA).The contents of growth hormone in lateral buds of bud-notching and branching element treatment were higher than those of bud-notching treatment only,with greater ratio of(IAA+GA+ZR)/ABA.The content of GA in single full-notched bud was significantly higher than that of other treatments during early stage and higher(IAA+GA+ZR)/ABA ratio in late stage.In summary,engraving buds and branching hormone treatment broke the balance of endogenous hormones,increased the content of growth hormones and reduced the efficiency of growth inhibitory hormone.
【Fund】: 中国农业科学院科技创新工程;; 辽宁省果树产业技术体系栽培技术研究岗位(LNGSCYTX-15-5)资助
【CateGory Index】: S661.2
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