Abstract
Pseudomonas putida (CMMB2) was isolated from open ocean water of Gulf of Mannar. The isolate was identified based on 16S rRNA gene sequencing and phylogenetic analysis. Chrome azurol sulphonate assay confirms siderophore production by the isolate. Nature of siderophore produced by the isolate was found to be of mixed type. Siderophore production was found to be inversely proportional to iron concentration of the medium. Maximum siderophore production was observed with MM9 medium. Siderophore production was found to be influenced by different carbon, nitrogen and amino acid sources. Optimization of MM9 medium nutrient composition by response surface methodology (RSM) enhances siderophore production. Application of RSM is one of the strategic attempts in cost effective siderophore production process. Presence of aromatic ring in the siderophore with (C–O) and (C=C) stretching was ascertained by FTIR spectral analysis. Mass spectral analysis revealed the presence of chromophore in the pyoverdine siderophore. Cell free supernatant and purified siderophore was found to inhibit the growth of bacterial and fungal pathogens.
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University Grants Commission (UGC), Government of India, is gratefully acknowledged for the financial support. Authors thank the Management of Thiagarajar College, Madurai and Odaiyappa College of Engineering and Technology, Theni for their support.
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Murugappan, R.M., Aravinth, A., Rajaroobia, R. et al. Optimization of MM9 Medium Constituents for Enhancement of Siderophoregenesis in Marine Pseudomonas putida Using Response Surface Methodology. Indian J Microbiol 52, 433–441 (2012). https://doi.org/10.1007/s12088-012-0258-y
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DOI: https://doi.org/10.1007/s12088-012-0258-y