草业学报2017，Vol.26Issue(2)：136-145,10.DOI:10.11686/cyxb2016303
香豆素对多花黑麦草种子萌发和幼苗生长化感作用的机理研究
Effect of coumarin on Italian ryegrass seed germination and seedling growth
摘要
Abstract
To study the mechanism of allelopathy,the effects of coumarin on Italian ryegrass seed germination and seedling growth were evaluated in a sand-culture experiment.Compared with the control,coumarin treatment significantly (P＜0.05) reduced the germination rate,root length,root dry weight,stem length,stem dry weight,and leaf dry weight of Italian ryegrass.The seedlings treated with coumarin showed significantly decreased indole acetic acid oxidase activity and lower chlorophyll content,compared with those in the control.The coumarin treatment also significantly (P＜0.05) increased the water soluble carbohydrate content and protein concentration in seeds on days 4 and 6,increased catalase activity and starch content,and decreased peroxidase activity in Italian ryegrass seedlings during the early growth period.The results showed that an aqueous coumarin solution at a concentration of 100μg/mL could control Italian ryegrass seed germination and seedling growth at the early stage,but it did not have a lethal effect.Coumarin inhibited endosperm function,disrupted the nutrient supply for seed germination,and destroyed cell membranes and cell walls in the endosperm,possibly leading to plasmolysis with water loss from cells.关键词
香豆素/多花黑麦草/化感/机理/透射电镜Key words
coumarin/Italian ryegrass (Lolium multiflorum)/allelopathic/mechanism/transmission electron microscope (TEM)引用本文复制引用
姚丹丹,王婧怡,周倩,汤前,赵国琦,邬彩霞..香豆素对多花黑麦草种子萌发和幼苗生长化感作用的机理研究[J].草业学报,2017,26(2):136-145,10.基金项目
国家自然科学基金(31101764)资助. （31101764）
