title: Selective control of cyanobacteria by surfactin-containing culture broth of Bacillus subtilis C1.
abstract: Of several types of chemical surfactants and biosurfactants, only the culture broth of Bacillus subtilis C1 containing surfactin at 10 mg l(-1) completely inhibited the growth of Microcystis aeruginosa, a bloom-forming cyanobacterium in highly eutrophic lakes. The broth with 10 mg surfactin l(-1) also removed 85% of the maximally grown M. aeruginosa (chlorophyll-a concentration, 1000 microg l(-1)) within 2 d, and the removal efficiency was enhanced by Ca2+ over 1 mM. The growth of Anabaena affinis, another bloom-forming cyanobacterium, was also inhibited about 70% with surfactin at 10 mg l(-1) broth. However, the effect of the broth was delayed over 3 d in the green algae, Chlorella vulgaris and Scenedesmus sp., and was negligible in a diatom, Navicula sp., indicating the potential for the selective control of cyanobacterial blooms.
authors.affiliation: Environmental Biotechnology Laboratory, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-333, Korea.
authors.forename: Chi-Yong
authors.initials: CY
authors.lastname: Ahn
authors.forename: Seung-Hyun
authors.initials: SH
authors.lastname: Joung
authors.forename: Jong-Woon
authors.initials: JW
authors.lastname: Jeon
authors.forename: Hee-Sik
authors.initials: HS
authors.lastname: Kim
authors.forename: Byung-Dae
authors.initials: BD
authors.lastname: Yoon
authors.forename: Hee-Mock
authors.initials: HM
authors.lastname: Oh
mesh_terms: D017033:Anabaena / Q000187:drug effects / Q000254:growth & development; D001412:Bacillus subtilis / Q000302:isolation & purification / Q000502:physiology*; D002175:Candida / Q000254:growth & development / Q000302:isolation & purification; D002708:Chlorella / Q000187:drug effects / Q000254:growth & development; D000460:Chlorophyta / Q000187:drug effects / Q000254:growth & development; D017077:Culture Media, Conditioned / Q000494:pharmacology*; D000458:Cyanobacteria / Q000187:drug effects / Q000254:growth & development*; D017377:Diatoms / Q000187:drug effects / Q000254:growth & development; D005068:Eutrophication / Q000187:drug effects* / Q000502:physiology; D005618:Fresh Water / Q000382:microbiology; D066298:In Vitro Techniques; D055666:Lipopeptides; D010456:Peptides, Cyclic / Q000494:pharmacology*; D013501:Surface-Active Agents / Q000494:pharmacology*; D014871:Water Microbiology
chemical_list: D017077:Culture Media, Conditioned; D055666:Lipopeptides; D010456:Peptides, Cyclic; D013501:Surface-Active Agents; C009365:surfactin peptide