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应用生态学报 ›› 1997, Vol. 8 ›› Issue (3): 304-308.

• 研究论文 • 上一篇    下一篇

胜红蓟化感作用研究Ⅰ.水溶物的化感作用及其化感物质分离鉴定

胡飞, 孔垂华   

  1. 华南农业大学热带亚热带生态研究所, 广州 510642
  • 收稿日期:1997-02-17 修回日期:1997-04-30 出版日期:1997-05-25 发布日期:1997-05-25
  • 基金资助:

    国家自然科学基金(39670141);广东省自然科学青年基金(960427)

Allelopathy of Ageratum conyzoides Ⅰ.Allelopathy of Ageratum conyzoides aqueous extract and isolation and identification of its allelochemicals

Hu Fei, Kong Chuihua   

  1. Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou 510642
  • Received:1997-02-17 Revised:1997-04-30 Online:1997-05-25 Published:1997-05-25

摘要: 研究了胜红蓟水溶物对植物的化感作用.结果表明,胜红蓟水溶物溶液浓度在0.25gFW·ml-1时对所有供试植物的萌发和幼苗生长均有显著的抑制作用,浓度降至0.10gFW·ml-1时其抑制作用基本消失;胜红蓟不同器官、不同生育期水溶物的化感作用是有差异的,特别是不同生境条件下生长的胜红蓟水溶物化感作用有显著差异,表明在恶劣生境下胜红蓟的化感作用更为强烈.对胜红蓟水溶物中的化感活性物质进行分离和分子结构鉴定,得到早熟素Ⅰ、早熟素Ⅱ和5,22-二烯3-β豆甾醇3个化感化合物.

关键词: 胜红蓟, 化感作用, 化感化合物, 分离鉴定, 生境, 土壤呼吸, 采样策略, 碳通量, 区域剖分

Abstract: Studies on the allelopathy of Ageratum conyzoides aqueous extract showed that the aqueous extract significantly inhibited seed germination and seedling growth of all tested plants at 0.25 g FW·ml-1 ,but the inhibition disappeared at 0.10 g FW·ml-1 . The allelopathic potential of aqueous extract from different organs of A.conyzoides and from its different development stages, especially from different habitats, was different. Ageratum conyzoides growing in adverse habitat showed a stronger allelopathic potential.Three allelochemicals from aqueous extract,e.g. precocene Ⅰ,precocene Ⅱ and stigmast 5,22-diene-3βol,were isolated and identified.

Key words: Ageratum conyzoides, Allelopathy, Allelochemical, Isolation and identification, Habitat, soil respiration, carbon flux estimation, sampling strategy, region division