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Effects of Uniconazole on Stem and Leaf Growth and Endogenous Hormone Contents of Dahlia ( Dahlia pinnata Cav.)

查看全文 作　　者：Fangying [1]XU;Yanhua [1]MIAO;Chi [1]CHEN;Xianfeng [1]YUAN;Jianzhong [1]TAN 高影响力作者 机构地区：[1]Department of Landscape Architecture,Architecture College,Soochow University,Suzhou 215123,China高影响力机构 出　　处：《Agricultural Biotechnology》索引2022年第11卷第2期,共4页高影响力期刊 基　　金：Supported by Suzhou Agricultural Science and Technology Project(SNG2018093). 摘　　要：[Objectives]This study was conducted to investigate the physiological mechanism of the response of Dahlia pinnata to exogenous uniconazole during vegetative growth.[Methods]The effects of different concentrations(20,30,60 and 80 mg/L)of foliar fertilization on stem and leaf growth,chlorophyll and endogenous hormone contents were investigated using dahlia seedlings(cultivar‘Shiwucaiqiu’)cultivated in the open field.[Results]Different concentrations of uniconazole could make dahlia plants dwarf,shorten internodes,increase stem diameter,and deepen leaf color,and the higher the application concentration,the more significant the effects.Compared with the control group,the relative contents of chlorophyll(SPAD value)in various treatment groups increased,the contents of endogenous GA_(3) and IAA decreased,and the contents of ABA increased.Among them,the contents of IAA and ABA also showed a trend of increasing first and then decreasing.[Conclusions]The results indicated that uniconazole could affect the growth of stems and leaves and plant type by regulating photosynthetic pigments and the levels of endogenous hormones in dahlia,and good dwarfing effect and ornamental value could be obtained under the condition of foliar application concentration of 30 mg/L.This study provides a new experimental basis for the cultivation and application of dahlia. 关 键 词：DAHLIA UNICONAZOLE Vegetative growth Plant type Endogenous hormones
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