1. 1Department of Microbiology, School of Life Sciences, Sikkim University, 6th Mile, Samdur, Tadong, Gangtok – 737102, Sikkim, India
2. 2Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India
3. 3Department of Biosciences and Bioengineering, Indian Institute ofTechnology Guwahati, Guwahati-781039, Assam, India