Coral Diseases in Panjang Island, Java Sea: Diversity of Anti–Pathogenic Bacterial Coral Symbionts

Corals are experiencing severe decline due to coral diseases. The main aim of this paper was to screen anti-pathogenic property of coral symbionts. Research works were started with sampling, bacterialisolation, anti-bacterial screening and polyphasic identification. Results showed that 48 of 130 isolates were able to inhibit the growth of diseased isolates. Two isolates of GSB18 and SMPSB4 showed a wide range of antibacterial activity. The molecular identification by partial 16S rRNA gene sequencing revealed that they were closely related to the general Pseudoalteromonas and Pseudomonas. The sequence results of anti-bacterial isolates indicated that there were two major groups of Actinobacteria and Gammaproteobacteria division.