Occurrence of fluorescent bacterium Pseudomonas aeruginosa a putative biocontrol agent in Indian pompano Trachinotus mookalee Cuvier, 1832

Abstract

Bacterial diversity studies in healthy marine finfish Trachinotus mookalee Cuvier, 1832 have lead to the isolation of six strains of Pseudomonas spp. The bacteria were isolated from the skin, gills and intestine of live and healthy fish collected from Karwar, Karnataka, India (N13°, 05.722‘; E079°, 48.658‘). Among the strains three were non-fluorescent and others were fluorescent Pseudomonas strains. Fluorescent strains are known to secrete pyoverdine, a yellow-green siderophore which has wide application in agriculture and allied sectors. Fluorescent strains were further characterized by 16S rDNA sequencing and were identified as Pseudomonas aeruginosa strain TRG1 (Genbank Accession No. KC109784).