The present book updates the subject content on Bacterial Genetics, Cloning Vectors in Molecular Biology, molecular tool to detect plant pathogen, Molecular Stress Response in Context with Abiotic and Biotic Factor, Plant Cells, Biochemistry of Methane Oxidation, Isolation of Secondary Metabolites, Silage, Polyamine and plant stress response, Photosynthesis, Transpiration, and Plant Hormones, Senescence and Abscission in Crops.