Antifouling activity of sponge-derived polybrominated diphenyl ethers and synthetic analogues.

Sofia Ortlepp, Suwigarn Pedpradap, Sergey Dobretsov, Peter Proksch

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24 Citations (Scopus)

Abstract

The antifouling (AF) activity of 2-hydroxy-4-(3-hydroxy-5-methylphenoxy)- 6-methylbenozoic acid methyl ester (1), 3,5-dibromo-2-(2',4'-dibromophenoxy)phenol (2); 3,4,5-tribromo-2-(2',4'-dibromophenoxy)phenol (3), 3,4,5-tribromo-2-(2'-bromophenoxy)phenol (4), 3,5-dibromo-2(2',4'-dibromophenoxy)phenol (5), 3,4,5,6-tetrabromo-2-(2'-bromophenoxy)phenol (6); 4-phenoxyphenol (7), 4-phenoxyaniline (9), 1-chloro-4-phenoxybenzene (10); 1-bromo-4-phenoxybenzene (13) was investigated against marine bacteria, a diatom, barnacle larvae and mussel juveniles. The naturally occurring compound 2 showed the strongest AF activity in all bioassays but lacked toxicity. It inhibited the growth of all tested bacterial strains (MIC = 0.02 - 1.52 microM) and its 50% effective concentrations (EC(50)) were 0.24 microM (diatom test), 0.66 microM (mussel test) and 1.26 microM (barnacle test). Among the commercially available derivates, compound 7 was the most active in bacterial and diatom bioassays but its activity was lower than that of compound 2. Overall, the naturally occurring compounds showed stronger activity than the commercially available analogues and could be possible future non-toxic AF candidates.

Original languageEnglish
Pages (from-to)201-208
Number of pages8
JournalBiofouling
Volume24
Issue number3
Publication statusPublished - 2008

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ASJC Scopus subject areas

  • Aquatic Science
  • Biotechnology

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