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    Molecular diversity of marine pigmented bacteria in the central Arabian Sea with special reference to antioxidant properties

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    Cahiers_de_Biol_Mar_59_409a.pdf (705.2Kb)
    Date
    2018
    Author
    Pawar, R.T.
    Mohandass, C.
    Rajasabapathy, R.
    Meena, R.M.
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    Abstract
    Pigmented bacteria (PIGB) from marine environment a rerecognized to impart protective action a gainst oxidative stress-induced cell damages. Since very little is known about their diversity and antioxidant potential, we attempted to study the molecular diversity of the cultivable PIGB with respect to antioxidant properties. In this study, we isolated 190 pigmented colonies of bacteria (yellow, orange, creamy, pink-red, brown and violet) from central west coast of India (CW CI). The ratio of pigmented and total viable counts of bacteria revealed that the CW CI possess 26.9 to 33.3% of pigmented bacteria (PIGB). Antioxidant evaluation by a DPPH-radica l decolourization assa y was revealed that 44.2 % of pigmented bacteria exhibited antioxidant property. Molecular identification by 16S rRNA gene sequence of the antioxidant potent bacteria showed a wide genetic diversity covering 22 genera affiliated to 4 major phyla , -- Proteobacteria, --Proteobacteria, Actinobacteria, and Firmicutes. Members of genera Pseudomonas, Serratia, Psychrobacter, Bacillus, and Vibrio had the highest proportion of antioxidant activity. Sequencing analysis of the PIGB revealed that some strains had < 97% similarity with their nearest type strains in GenBank data base indicating that they may be novel taxa . This work forms first comprehensive report on the phylogenetic structuring of antioxidative PIGB in CW CI
    URI
    https://doi.org/10.21411/CBM.A.14870D31
    http://drs.nio.org/drs/handle/2264/8027
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