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作 者 ：孔垂华,徐效华,陈建军,胡飞,谭中文

期 刊 ：生态学报 2002年 22卷 8期 页码：1189~1195

关键词：胜红蓟挥发油；胜红蓟素；转化；二聚体；土壤；

Keywords:volatile oil of A. conyzoides, ageratochromene, transformation, dimer, soil,

摘 要 ：在田间条件下 ,胜红蓟挥发油能抑制花生的出苗和生长发育。进一步用高效液相色谱 (HPLC)研究证实 :胜红蓟挥发油中的主要化感物质胜红蓟素在土壤中的转化与土壤的有机质和营养元素水平显著相关。在高有机质和营养元素水平的土壤中 ,胜红蓟素先聚合形成二聚体 ,2 6d后又解聚成胜红蓟素 ,然后逐步降解成苯甲酸类 ,2 -甲基丙酸和乙酸等小分子。而在低有机质和营养元素水平的土壤中 ,胜红蓟素不经过二聚化过程 ,而是直接降解成小分子。经液质 (LC/MS)和核磁共振 (NMR)等技术分离鉴定了胜红蓟素二聚体的结构。生物测定表明 :胜红蓟素二聚体对花生和黑牧草的生长没有抑制活性。

Abstract:Under treatment condition of volatile oil from Ageratum conyzoides , the germination rate, fatty and protein enzymes, soluble protein of seed, root length, shoot height, chlorophyll content, the number of nodule of seedling and the number of branch, peg and pod as well as flowering period of peanut were tested and determined. All items and indexes demonstrated that the germination, growth and development of peanut were inhibited by volatile oil from A. conyzoides in the field. Obviously, allelopathic...

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