摘要
为了探讨美洲商陆根部浸提液对不同作物种子萌发及幼苗生长的化感作用,以萝卜、小麦和棉花3种常见的作物为材料,采用培养皿发芽试验等方法,研究不同浓度美洲商陆根部浸提液对3种作物种子萌发、幼苗生长以及保护酶活性、渗透调节物质和丙二醛含量的影响。结果表明,美洲商陆根部浸提液对3种作物种子发芽率、发芽势、发芽指数,幼苗苗高、根长和鲜重均产生不同程度的抑制作用,浸提液浓度越高,抑制作用越强;随着浸提液浓度升高,萝卜和小麦的SOD、POD活性和棉花的SOD活性呈现先升高后下降趋势,而棉花的POD活性始终呈现升高趋势,小麦和棉花的可溶性糖、可溶性蛋白、Pro和MDA含量均呈现逐渐升高趋势,而萝卜的可溶性蛋白含量呈现先升高后下降趋势,综合比较,浸提液对萝卜种子萌发和幼苗生长抑制作用较强,对棉花种子抑制作用较弱。
In order to explore the Allelopathic effects of Phytolacca americana root extract on seed germination andseedling growth of different crops,taking radish,wheat and cotton as materials,the effects of different concentra-tions of Phytolacca americana root extract on seed germination,seedling growth,protective enzyme activity,osmot-ic adjustment substance and malondialdehyde content of three crops were studied by means of culture dish germina-tion test.The results showed that the extracts of Phytolacca americana root had different degrees of inhibition onseed germination rate,germination potential,germination index,seedling height,root length and fresh weight ofthree crops.The higher the concentration of extract,the stronger the inhibition.With the increase of extract concen-tration,the activities of SOD and POD in radish and wheat and SOD activityin cotton firstincreased and then de-creased,while the activity of POD in cotton always showed aincreasing trend.The contents of soluble sugar,solu-ble protein,Pro and MDA in wheat and cotton increased gradually,while that radish increased first and then de-creased.The results showed that the extracts had stronger inhibition on radish seed germination and seedling growththan on cotton seed.
作者
温四民
张桂玲
袁蕾
WEN Simin;ZHANG Guiling;YUAN Lei(Asset Management Office,Linyi University,Linyi 276000;College of Agriculture and.Forestry Science,Linyi University,Linyi 276000;Linyi City Management Comprehensive Service Center,Linyi 276000,China)
出处
《东北农业科学》
北大核心
2020年第3期76-80,共5页
Journal of Northeast Agricultural Sciences
基金
国家自然科学基金(31500371)
国家星火计划项目(2015GA740077)
临沂市研究课题(2018LX225)。
关键词
美洲商陆
浸提液
化感效应
作物种子
种子萌发
幼苗生长
Phytolacca americana
Extract
Allelopathic effect
Crop seeds
Seed germination
Seedling growth
