Inhibition of marine biofouling by aquatic Actinobacteria and coral-associated marine bacteria

Abstract

Aims:Biofouling is a common biology phenomenon occuring on ship surface. This phenomenon has become serious threat in marine industries because of great economic loss. Tributyltin has been used to prevent biofouling, but it turned to cause the environmental problem. Therefore, the discovery of alternative environment-friendly compound is necessarily needed. Methodology and results: Five Actinobacteria isolates and fourteen marine bacteria isolates were tested against the biofilm formation of eight biofouling bacteria isolates that isolated from boat surface and the attachment of three biofouling diatoms (Amphora, Navicula, Nitzschia). Actinobacteria CW17 supernatant showed the broad spectrum activity against all fouling bacteria, whereas BC 11-5 supernatant was the only marine bacteria that capable to inhibit biofilm formation of V. neocaledonicus. Moreover, three representative diatoms attachment could be inhibited by the bioactive compounds produced by Actinobacteria and marine bacteria. CW01 supernatant showed broad spectrum and high activity against all three representative diatoms which is very promising. Molecular identification based on 16S rDNA gene sequence showed eight fouling bacteria isolates were biofilm-forming bacteria. Conclusions, significance and impact of study: This research showed aquatic Actinobacteria and coral-associated marine bacteria have the potential to prevent biofouling formation. Further studies are needed to purify and characterize these antibiofouling compounds for environmental application.

Marine Actinomycetes, New Sources of Biotechnological Products

“…Another study found Streptomyces sp. and Arthrobacter mysorens extracts had broad spectrum activity against biofouling bacteria [ 33 ]. The extracts are practicable alternatives to banned toxic copper oxide and tributyltin oxide anti-fouling coatings [ 151 ].…”

“…Marine actinomycetes associate with a variety of aquatic organisms, including invertebrates such as sponges [ 27 , 31 ], corals [ 32 , 33 ], and echinoderms [ 7 ], as well as vertebrates such as pufferfish [ 34 ]. These interactions may encourage unique chemical ecologies that might influence the evolution of secondary metabolic pathways.…”

Hydrophobic DES Based on Menthol and Natural Organic Acids for Use in Antifouling Marine Coatings

“…This biofilm stimulates macrofouling larva or spore adherence and the attachment of invertebrates and algae to submerged marine surfaces, evolving into a complex biological community . For that reason, inhibiting bacterial biofilm formation is of utmost importance to prevent biofouling formation. − …”

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“…can get vibriosis, which causes huge economic losses in the aquaculture . This species reportedly also forms biofilms on the surface of ship hulls and marine infrastructure (Waturangi et al, 2017). Antifouling technology is used in controlling biofouling, for example, biofouling paint.…”