Plant growth occurs in a plant throughout its lifespan. Its growth involves the stages of embryogenesis, organogenesis and cell elongation. Plant growth and development are facilitated by certain plant growth regulators and hormones. The directional growth of plants arises as a result of a plant's response to certain stimuli such as gravity, light, water and physical contact. Plant age, dormancy, temperature, drought and other environmental conditions influence the hormone levels of a plant. Such aspects of plant development and variation are studied under the science of plant biotechnology. It focuses on modifying plants to exhibit desirable characteristics. Such breeding is necessary for ensuring disease resistance, higher yields, drought tolerance or increased adaptability in plants. This book discusses the fundamentals as well as modern understanding of plant development. It unfolds the innovative aspects of plant biotechnology, which will be crucial for the progress of this field in the future. This book is a vital tool for all researching or studying these fields as it gives incredible insights into emerging trends and concepts.