不同激素处理对青钱柳嫩枝扦插生根及内源激素含量的影响

[Objective]Cyclocarya paliurus,a rare tree species,is endemic to China and mainly distributed in Jiangxi,Anhui,Fujian,Guangxi and other provinces.However,Cyclocarya paliurus cuttings are difficult to root.In order to improve the rooting quality and rooting rate of Cyclocarya paliurus,different hormone treatments have been designed to analyze and discuss the rooting and growth of its cuttings.[Method]The experiment set up six kinds of hormones(IR1#、IR2#、IR3#、SR2#、SR3#、ABT-1(CK))to treat the current year sprout shoots of the superior family in Jinzhongshan,Guangxi.The contents of endogenous hormones(IAA,IBA,ABA,TZR,GA1 and GA3)were determined on July 13(0d),August 3(20d)and August 23(40d).Take 6 cuttings with roughly the same growth each time,washed with distilled water and stored in a refrigerator at-70℃.The rooting rate of cuttings was counted on September 13(60d).[Results]By observing the rooting status of cuttings and the dynamic changes of endogenous hormone contents,it was found that the use of exogenous hormones to treat cuttings can significantly improve the rooting qualitys.The series of SR treatments could significantly increase the number of rooting,and SR2 treatments had the highest number of rooting.The rooting rate and root length were promoted by IR treatments.The rooting rate of ABT-1 treatments was only 10%.There were significant differences in endogenous hormone contents in cuttings of Cyclocarya paliurus with different hormone treatments.With the extension of cutting time,the content of IAA decreased generally,while the content of GA1 and ABA increased.The content of IBA and GA3 showed a law of"first increasing and then decreasing",while the content of tZR showed a trend of"first decreasing and then increasing".[Conclusion]In general,the cuttings of Cyclocarya sylvestris treated with IR2,IR3,and SR3 effectively increased the rooting rate of the cuttings and promoted the length of the root system.The hormone content contributed to the formation of adventitious roots and increased the number of roots.Various hormone treatments greatly promoted the rooting rate and transplanting survival rate of Cyclocarya sylvestris and accelerated the industrialization process of its resources.