Since their very first appearance on this planet, the microorganisms have benefitted our society in many ways. They are supposed to be the simplest but most versatile and talented products of evolution. They thrive in habitats extremely hostile to human life and are infinitely more skilled than any human chemist in their synthetic activities. Their rich diversity and their functional aspects make them indispensable components of our ecosystems. This book has been published on the eve of 75th Birth Day of Prof. Sudhir Chandra, Former Head and Emeritus Professor, Department of Botany,...