Molecular characterization and bioactivity profile of the tropical sponge-associated bacterium Shewanella algae VCDB
2014
Rachanamol, R. S. | Lipton, A. P. | Thankamani, V. | Sarika, A. R. | Selvin, J.
The pigmented, rod-shaped, Gram-negative, motile bacteria isolated from marine sponge Callyspongia diffusa exhibiting bioactivity was characterized as Shewanella algae (GenBank: KC623651). The 16S rRNA gene sequence-based phylogenetic analysis showed its similarity with the member of Shewanella and placed in a separate cluster with the recognized bacteria S. algae (PSB-05 FJ86678) with which it showed 99.0 % sequence similarity. Growth of the strain was optimum at temperature 30 °C, pH 8.0 in the presence of 2.0–4.0 % of NaCl. High antibiotic activity against microbes such as Escherichia coli (MTCC 40), S. typhii (MTCC 98), P. vulgaris (MTCC 426), V. fluvialis, V. anguillarum, E. cloacae, and L. lactis was recorded. The growth of fungal pathogens such as Aspergillus niger, Aspergillus fumigatus, Saccharomyces cerevisiae, and Colletotrichum gloeosporioides was effectively controlled.
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