This book focuses on the latest developments in endophytic and arbuscular mycorrhizal fungi and their role in sustainable agriculture. The authors of this book explore how these fungi can aid other plants in a variety of ways. These microorganisms can be used to stimulate the growth and production of agricultural crops, improve the quality of ornamental plants, boost plants' ability to combat biotic and abiotic challenges, and much more. Overall, this book aims to show the useful nature of these fungi in our everchanging world and environment.