Stresses faced by plants due to changing external environment are classified into abiotic and biotic stress. Biotic stresses occur due to the infestation of plants by various organisms such as fungi, bacteria, viruses, herbivores and nematodes. These agents acts as parasites and deprive plants of their nutrients. Abiotic stresses include salination of water, drought, floods, desertification and extreme weather conditions. To combat these situations, plants undergo various biological changes such as altered generation, pathogen-associated molecular patterns, etc. Across the world, these stresses are responsible for loss of harvest and decreased crop yield. Increasing scarcity of water and changing weather patterns are predicted to increase stresses in plants. This book brings forth some of the most innovative concepts and elucidates the unexplored aspects of abiotic and biotic stress in plants. From theories to research to practical applications, case studies related to all contemporary topics of relevance to this field have been included in it. This book is a vital tool for all researching or studying abiotic and biotic stresses in plants as it gives incredible insights into emerging trends and concepts.