Selective control of cyanobacteria by surfactin-containing culture broth of Bacillus subtilis C1

• Published in: Biotechnology letters Vol. 25; no. 14; pp. 1137 - 1142
• Main Authors: AHN, Chi-Yong, JOUNG, Seung-Hyun, JEON, Jong-Woon, KIM, Hee-Sik, YOON, Byung-Dae, OH, Hee-Mock
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer 01.07.2003; Springer Nature B.V
• Subjects: Anabaena - drug effects; Anabaena - growth & development; Anabaena affinis; Bacillariophyceae; Bacillus subtilis; Bacillus subtilis - isolation & purification; Bacillus subtilis - physiology; Bacteria; Biological and medical sciences; Candida - growth & development; Candida - isolation & purification; Chlorella - drug effects; Chlorella - growth & development; Chlorella vulgaris; Chlorophyta - drug effects; Chlorophyta - growth & development; Culture Media, Conditioned - pharmacology; Cyanobacteria; Cyanobacteria - drug effects; Cyanobacteria - growth & development; Cyanophyta; Diatoms - drug effects; Diatoms - growth & development; Eutrophication - drug effects; Eutrophication - physiology; Fresh Water - microbiology; Freshwater; Fundamental and applied biological sciences. Psychology; In Vitro Techniques; Lipopeptides; Microcystis aeruginosa; Navicula; Peptides, Cyclic - pharmacology; Scenedesmus; Surface-Active Agents - pharmacology; Surfactin; Water Microbiology
• ISSN: 0141-5492; 1573-6776
• DOI: 10.1023/A:1024508927361

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.