D N TiwariDr. Devendra Nath Tiwari PhD, has served as Professor of Botany, Head of Department of Botany and Coordinator for the Center of Advanced Studies in Botany at Banaras Hindu University. He has 38 years of teaching and 41 years of research experience an published several research papers in reputed international scientific journals. His subject interest was focused on physiology and genetics of cyanobacteria especially N2 fixing systems. He also worked as Visiting Professor in Durham University, England (1985-1986), Michigan State University, USA (1991) and Mu'tah University, Jordan (1993) as well as Professor of Botany and Biotechnology and Dean at Mizoram Central University, School of Life Sciences (2006-2009). Read More Read Less