This book was written to help researchers, teachers, and students to properly understand and use the major techniques and methods employed in cellular and molecular biology. Each chapter covers an outline of theoretical concepts and principles of various protocols followed by a detailed practical methodology. Aspects on General Laboratory Principles together with a brief description of various instruments and methods are dealt with in the first chapter followed by the second chapter on qualitative and quantitative estimations in Plant Biochemistry and Physiology. The chapter on Cytology concerns crisp methods for cytological study, followed by  the chapter on Genetics, which includes theory and problems besides statistical analysis. The chapter concerning Plant Molecular Genetics includes a sizeable collection of protocols dealing with various aspects of recombinant DNA technology and gene cloning. The sixth chapter deals with Plant Genetic Engineering, which includes tissue culture methods followed by protocols of gene transfer and molecular analysis of the putative transformants.