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Diversity and activity of methanotrophic related bacteria in subsurface sediments of the Krishna-Godavari Basin, India

DRS at CSIR-National Institute of Oceanography

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Title Diversity and activity of methanotrophic related bacteria in subsurface sediments of the Krishna-Godavari Basin, India
 
Creator Sujith, P.P.
Sheba, M.
Gonsalves, M.J.B.D.
 
Subject MICROBIOLOGY::General
GEOLOGY AND GEOPHYSICS::Sediments and sedimentation
AQUATIC ECOLOGY, PRODUCTIVITY::Ecosystems and energetics
MICROBIOLOGY::Geographic distribution
MICROBIOLOGY::Taxonomy and morphology
MICROBIOLOGY::Genetics and evolution
 
Description The present study assesses the distribution, diversity and activity of aerobic methanotrophic related bacteria (MRB) dwelling in Krishna-Godavari (KG) basin, India. The counts of MRB ranged from non-detectable(ND) to 8.6 ?- 104 CFU gram dry weight of the sediment, with maximum counts at 24.2 m below seafloor. Greater methanotrophic bacterial abundance was at the surface/subsurface sediments of the core at station MD161-8 than at the bottom sediments. Identification of these isolates by 16S rDNA sequence analysis showed their taxonomic affiliation to Alcanivorax, Methylophaga, Marinobacter, Joostella, Methylobacterium, Desulfovibrio species and other uncultured bacterial clones. The isolates grew under optimum pH of 8, temperature of 28degreeC and salinity of 35, and on different carbon sources like yeast extract, D-glucose, ethanol and methanol. The addition of nitrogen sources like amino acids and yeast extract improved methanotrophic activity by the isolates. These results add to our understanding of MRB and their activity in modulating the emission of methane from gas hydrate -rich ecosystems like the KG basin
 
Date 2016-06-14T06:57:09Z
2016-06-14T06:57:09Z
2016
 
Type Journal Article
 
Identifier Current Science, vol.110(9); 2016; 1801-1809
http://drs.nio.org/drs/handle/2264/4978
 
Language en
 
Rights Copyright [2016]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Current Science Association