Abstract
China remains by far the largest aquaculture producer in the world. However, biofilms formed by pathogenic Vibrio strains pose serious problems to marine aquaculture. To provide a strategy for biofilm prevention, control, and eradication, extracts from 88 marine actinomycetes were screened. Thirty-five inhibited the biofilm formation of Vibrio harveyi, Vibrio vulnificus, and Vibrio anguillarum at a concentration of 2.5% (v/v). Thirty-three of the actinomycete extracts dispersed the mature biofilm. Six extracts inhibited the quorum-sensing system of V. harveyi by attenuating the signal molecules N-acylated homoserine lactones’ activity. Strain A66, which was identified as Steptomyces albus, both attenuated the biofilms and inhibited their quorum-sensing system. It is suggested that strain A66 is a promising candidate to be used in future marine aquaculture.
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Acknowledgment
We thank Arnold Demain for his critical reading of the manuscript and helpful discussions. This work was supported by grants from the National High Technology Research and Development Plan of China 2003AA620401, 863 project 2006AA09Z402, Chinese Academy of Sciences Innovation Projects O62A131BB4, 973 project 2007CB707802, and pilot grants from the South China Sea Institute of Oceanology, Chinese Academy of Sciences.
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You, J., Xue, X., Cao, L. et al. Inhibition of Vibrio biofilm formation by a marine actinomycete strain A66. Appl Microbiol Biotechnol 76, 1137–1144 (2007). https://doi.org/10.1007/s00253-007-1074-x
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DOI: https://doi.org/10.1007/s00253-007-1074-x