Detection of luxAGene on Plasmid DNA of Luminous Bacteria Vibrio campbelliiSTF1

Bacterial bioluminescence is emitted due to regulation by luxgenes present on the chromosomal DNA. Earlier studies have attempted to find possible occurrence of luxgenes on plasmid DNA (pDNA) but did not find such incident. Evidently, the present study reveals the rare incidence of luxAgene on pDNA analysed using polymerase chain reaction. We detected the 755 bp of luxAgene on plasmid DNA of luminous bacteria Vibrio campbelliistrain STF1. We postulate that this rare evidence on the occurrence of luxAgene on pDNA might be due to horizontal gene transfer/gene integration and its role on pDNA is yet to be ascertained.