作　　者： ; ; ;

机构地区： 韩山师范学院生物系

出　　处： 《贵州农业科学》 2012年第12期104-107,共4页

摘　　要： 为了筛选能抑制入侵植物三叶鬼针草生长的植物源除草剂,利用2种人工合成的呋喃酮类化感物质(编号分别为110和710)处理三叶鬼针草幼苗,测定其叶绿素含量、质膜透性、SOD酶和根系活力等生理指标的变化。结果表明:不同浓度的2种物质对三叶鬼针草的代谢活动均有影响,作用强度表现出浓度依赖性。在化感物质浓度为0.4mmol/L时,叶绿素的含量明显下降,2种供体的化感指数分别为-0.471和-0.494;质膜透性明显增大,并出现SOD酶活性升高,根系活力增大等应激反应。2种化感物质相比,化感物质110的抑草活性高于化感物质710。 In order to screen allelochemicals suppressing the growth of invasive weed B. pilosa, two synthetic furanone allelochemicals （No. 110 and No. 710） were employed to treat B. pilosa seedlings,then the changes of chlorophyll contents, plasma membranes permeability, SOD activity and root vigor were evaluated. The results showed that the two different concentrations of allelochemicals both impacted the metabolic activities of 13. pilosa. When the concentration was 0.4 retool/L, the content of chlorophyll in B. pilosa declined significantly, the allelopathy inhibition indexes were respectively --0. 471（No. 110） and --0. 494（No. 710）, plasma memebranes permeability increased obviously, but SOD activity and root vigor presented an upbeat trend. The weed-suppressive effect of allelochemical No. 110 was superior to No. 710.

关 键 词： 化感物质 三叶鬼针草 生理指标 有害杂草 入侵植物

领　　域： [农业科学] [生物学]