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Antifouling activity of commercial biocides vs. natural and natural-derived products assessed by marine bacteria adhesion bioassay

Abstract : Biofilm formation is a key step during marine biofouling, the natural colonization of immersed substrata, leading to major economic and ecological consequences. Consequently, bacteria have been used for the screening of new non-toxic antifoulants: the adhesion of five strains isolated on three French locations was monitored using a fluorescence-based assay and toxicity was also evaluated. Nine biocides including commercial, natural and natural-derived products were tested. The commercial antifoulants, TBTO and Sea Nine showed low EC(50) but high toxicity. The non-commercial products TFA-Z showed significant anti-adhesion activities and appeared to be non-toxic, suggesting a specific anti-adhesion mechanism. In addition, the strains could be classified depending on their sensitivity to the molecules used even if strain sensitivity also depended on the molecules tested. In conclusion, TFA-Z would be a promising candidate as non-toxic antifoulant and our results strengthen the need to perform antifouling bioassays with a panel of strains showing different response profiles.
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https://hal.archives-ouvertes.fr/hal-03184243
Contributor : Mercedes Jardin Camps <>
Submitted on : Monday, March 29, 2021 - 12:17:32 PM
Last modification on : Tuesday, March 30, 2021 - 11:18:02 AM

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Mercedes Camps, Jean-François Briand, Linda Guentas-Dombrowsky, Gérald Culioli, Alexis Bazire, et al.. Antifouling activity of commercial biocides vs. natural and natural-derived products assessed by marine bacteria adhesion bioassay. Marine Pollution Bulletin, Elsevier, 2011, 62 (5), pp.1032-1040. ⟨10.1016/j.marpolbul.2011.02.031⟩. ⟨hal-03184243⟩

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