Effects of Sodium α-Naphthylacetate and Soil Covering on Sugar Metabolism of Hazelnut Sprout Tillers
Hazelnut is an important economic tree species.Too many sprout tillers seriously restrict the development of ha-zelnut industry.In this study,by spraying exogenous hormones or covering the soil,the effects of the treatments on the growth of hazelnut sprout tillers and the changes of sugar substances were explored.A flat-European hybrid hazelnut variety Kuixiang was used as the experimental material,and four treatments were set up in the experiment,namely spraying α-naphthylacetate sodium(N),covering soil+spraying clear water(M),covering soil+spraying sodium α-naphthylacetate(M+N),and spraying clear water as control(CK).Under the test period of 35 d,compared with CK treatment,N and M treatments effectively re-duced the height and thickness of sprouting branches,the height decreased by 70.50%and 44.64%,and the thickness de-creased by 48.71%and 2.58%,respectively.At the time of sprouting(10 th day after treatment),the contents of soluble sugar,fructose,and sucrose in sprouting branches treated with M+N decreased significantly,by 22.39%,4.39%and 29.63%respec-tively.The activities of sucrose phosphate synthase,sucrose synthase,and neutral invertase in sprouting branches treated with M+N decreased significantly,by 12.16%,24.26%and 58.24%respectively.The activity of acid invertase treated with M+N increased significantly,by 49.93%.In conclusion,by covering soil+spraying sodium α-naphthylacetate,the activities of su-crose phosphate synthase,sucrose synthase,and neutral invertase were reduced,the contents of soluble sugar,fructose,and sucrose were decreased,the process of sugar metabolism was effectively inhibited,and the growth of hazelnut sprout tillers was significantly inhibited.
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