Журнал управления прибрежной зоной

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Antifouling Activity of Bacteria associated with Soft Coral Sarcophyton Sp. against Marine Biofilmforming Bacteria

Agus Sabdono and Ocky Karna Radjasa

Marine bacteria associated with soft coral Sarcophyton sp collected from vicinity of Peucang
island, Ujung Kulon, West Java, were successfully screened for antifouling activity against marine
biofilm-forming bacteria isolated from the surrounding colonies of Sarcophyton sp. Six bacterial
isolates were found to inhibit the growth of at least one of 7 biofilm-forming isolates. The most active
strain USP3.37 was identified as Pelagiobacter variabilis by using 16S rDNA gene sequence analysis.
Similarly, the active strains USP3.3, USP8.43, USP3.12, USP3.16 and USP8.6 were identified as
Arthrobacter nicotianae, Shewanella alga, Pseudomonas synxantha, Pseudomonas falgida,
Pseudovibrio denitrificans and Bacillus aquamaris, respectively. USP3.37 strain was found to amplify
gene fragments of non-ribosomal peptide synthetase (NRPS). This raises the possibility the use of
softcoral bacteria as the source of antibacterial compounds for controlling the antifouling in the sea.
Therefore, this bacterium would be better to select eco-friendly antifouling compounds than the other
antibacterial activities.