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Isolation and characterization of a moderately halophilic Marinobacter phage-host system from the Arabian Sea by Sreekumar Aparna; Ammini Parvathi; Arya Kaniyassery is a Environmental Science article available to read on EtoBox.

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Marinobacter is an ecologically important genus of Gammaproteobacteria found in diverse marine habitats, many species of which are capable of degrading hydrocarbons. In this study, we isolated a Marinobacter phage-host system from the surface waters of the Arabian Sea using enrichment culture methods, studied their growth characteristics and investigated the effect of salinity and nitrate concentrations on phage-host interactions. The bacterial isolate had maximum identity to Marinobacter salsuginis based on 16S rRNA similarities and was termed as Marinobacter sp., strain D1S9. It could tolerate up to 14% of NaCl with maximum growth at 11% NaCl. The host grew optimally between 35 and 40 °C and at pH 8. It had a generation time of 3.7 h with a mean growth rate of 0.27 h. The phage infected the host forming clear, round plaques of 1-2 mm diameter. It had a narrow host range restricted to the strain Marinobacter D1S9. The latent period and burst size of the phage were estimated to be 30 min and 106 phages per infected cell, respectively. The phage had an adsorption rate of 3.4 × 10 ml min and retained 40.4% of its adsorption efficiency at 16% NaCl with a maximum at 4% NaCl (76.1%). In

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Author

Sreekumar Aparna; Ammini Parvathi; Arya Kaniyassery

Publisher

Springer; Springer-Verlag; Kluwer Academic Publishers; Springer Science and Business Media LLC; Publons; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0167-6369)

Published

2020

Language

EN

Field

Environmental Science (Physical Sciences)