This book is an inclusive collection of topics on research on UVB for its impact on plants with a focus on its use as an emerging technology for crop growth and protection. This book covers role of UV-B on biological systems, and its transformation from generic stressor to specific regulator.  It also explores the past research in UVB studies and the changing mind-sets regarding UV-B in recent time with respect to the plant growth. It also explores the discovery of specific UV-B photoreceptor, UVR8  and UVR8 mediated plants responses.   This book is of interest to teachers, researchers, agriculture scientists and plant physiologists. Also the book serves as additional reading material for undergraduate and graduate students of agriculture, forestry, ecology, soil science, and environmental sciences