The purpose of this book is to thoroughly understand the interaction of the most widely produced and commercial nanoparticles (NPs) with stressed plants and to study the physiological, biochemical, and molecular mechanisms by which NPs mitigate stressful conditions. This book explores recent advancements in NPs and their contribution to promoting plant growth, as well as improving plant tolerance to both abiotic and biotic stresses, along with the mechanisms behind these effects. To our knowledge, this is the first book focused on the impact of the most widely produced and commercial (15 types of NPs) on plants under abiotic and biotic stressors. The book is intended for researchers, academics, and postgraduate students in plant sciences, nanobiotechnology, agronomy, plant physiology, plant pathology, soil science, and environmental science. It will also be highly relevant to professionals working on abiotic and biotic stress management, nano-enabled agricultural inputs, sustainable crop production, and climate-resilient agriculture, as well as policymakers and industry specialists interested in nanoparticle-based strategies for sustainable plant solutions.