Plant science is a diverse science dealing with the innumerous species of plants existing on the face of the planet. This book consists of contributions from researchers across the globe. It elucidates the relationship between environment and plants, specifically highlighting species-environment relationship and response of plants to distinct environmental stress conditions. It also presents both negative as well as positive impacts of microbes on plants. Furthermore, the book highlights present biotechnological research for development of novel technology in order to produce biological and enhance plant immunity in the current environmental conditions. This book will appeal to a broad spectrum of readers including scientists, researchers, professionals, students interested in studying in-depth about plant science and its various aspects.