title: [Inhibition effects of Houttuynia cordata Thunb. on Microcystis aeruginosa].
abstract: OBJECTIVE
  To research the inhibitory effect of Houttuynia cordata Thunb. on Microcystis aeruginosa.
  
  
  METHODS
  M. aeruginosat were treated respectively by H. cordata leaching solution or H. cordata extracts. H. cordata leaching solution extracted by water and the H. cordata extracts extracted by organic solvent (acetone, ethyl acetate, petroleum ether and ethanol, respectively). The inhibition ratios were calculated according to the M. aeruginosa densities, and the allelochemicals of the extract that had the best inhibitiory effect on M. aeruginosa were identified by GC-MS analysis.
  
  
  RESULTS
  It was proved that leaching solution of H. cordata and four crude extracts had good inhibitory effect on M. aeruginosa. The inhibitory effects of the four crude extracts were the fraction extracted by ethyl acetate, the fraction extracted by ethanol, the fraction extracted by acetone and the fraction extracted by petroleum ether form strong to weak in turn. Then, the allelochemicals of the fraction extracted by ethyl acetate were indentified, mainly including acetonyldimethylcarbinol, 2,2-dimethyl-3-hexanone, 6-chlorohexanoic and 4-cyanophenyl ester.
  
  
  CONCLUSIONS
  H. cordata has strong inhibitory effect on water-blooming cyanobacteria and the potential to develop into an ecological M. aeruginosa inhibiting agent.
authors: Lu
authors: L
authors: Liu
authors: Cheng
authors: C
authors: Li
authors: Wentong
authors: W
authors: Xia
authors: Xiaohui
authors: X
authors: Yang
authors: Tingting
authors: T
authors: Zhang
mesh_terms: D004365:Drugs, Chinese Herbal; D000431:Ethanol; D057097:Harmful Algal Bloom; D052859:Houttuynia; D046931:Microcystis; D010675:Pheromones; D010936:Plant Extracts / Q000494:pharmacology*; D014867:Water
chemical_list: D004365:Drugs, Chinese Herbal; D010675:Pheromones; D010936:Plant Extracts; D014867:Water; D000431:Ethanol