Seed Physiology will give an insight into fundamentals of seed science. The first evergreen revolution bloomed as a result of development of high yielding varieties and timely availability of good quality seeds. Modern agriculture is unsustainable, as it cannot continue to produce enough food for the ever-growing population. In order to increase the production potential under stressful environment with limited resources the use of high quality seeds is inevitable. A good quality seed should be genetically pure, physiologically sound with good health and vigour. Among the above qualities, physiologically sound seed will have more germination percentage with high vigour, which is essential under stressful environment. Hence, understanding basic physiological process and metabolism in seed during germination, emergence, growth and development is indispensable for scientists in plant sciences. Respected authorities discuss in detail the full spectrum of issues on seed physiology making it an essential resource for educators, agriculturalists, researchers, environments, seed technologists, physiologists and students.