1. Thapar University, Department of Biotechnology, Bhadson Road, Patiala 147 004, India
2. Department of Biological Sciences, University of Alabama in Huntsville, Huntsville, AL 35899, USA
3. Microbial Ecology, CNRS UMR 5557, USC INRA 1364, Université Lyon1, Université de Lyon F-69622 Villeurbanne, France