Plant Physiologists have to certainly sort out the insufluciency of consequential researches, genuinely required for getting higher productivity, opulence and sustainability of agriculture through outstandingly promising technologies to help improvement in metabolic boundaries necessitates mainly for abiotic stress factors. The aspiration is to make stronger the vital outcome of conscientious research coupled principally with thorough perceptions of underlying mechanisms of plant tolerance under changing environments. Nevertheless, appropriate strategies by relevant ideas of paramount importance could ensure food production under extremes of stressful conditions geographically varying from one place to another. The book entitled Plant Abiotic Stresses: Physiological Mechanisms, Tools and Regulation has substance for extending simple and applied researches for their rapid applications in agriculture besides broadening knowledge of the abiotic stress science far and beyond. On the other hand, with loo ming third decade, stress physiology research has almost surpassed the fundamentals globally and has been entirely intriguing to scrutinize the physiological and molecular bases of plant stress tolerance. At this decisive point in time, hopefully, this book, in part, could be a step forward in providing enough insight on stress causing multiple environmental components and to obtain favourable directions in several ways. All possible research initiatives have been sensibly included in exceptionally well written chapters by genuinely dedicated eminent contributors with a view to organize the burning theme of the present scenario being acknowledged resolutely by the world scientists.