Crop plants growing under field conditions are constantly exposed to various abiotic and biotic stress factors leading to decreased yield and quality of produce. In order to achieve sustainable development in agriculture and to increase agricultural production for feeding an increasing global population, it is necessary to use ecologically compatible and environmentally friendly strategies to decrease the adverse effects of stresses on the plant. Selenium is one of the critical elements from the biological contexts because it is essential for human health; however, it becomes toxic at high concentrations. It has been widely reported that selenium can promote plant growth and alleviate various stresses as well as increase the quantity and quality of the yield of many plant species. Nonetheless, at high concentrations, selenium causes phytotoxicity. In the last decade, nanotechnology has emerged as a prominent tool for enhancing agricultural productivity. The production and applications of nanoparticles (NPs) have greatly increased in many industries, such as energy production, healthcare, agriculture, and environmental protection. The application of NPs has attracted interest for their potential to alleviate abiotic and biotic stresses in a more rapid, cost-effective, and more sustainable way than conventional treatment technologies. Recently, research related to selenium-NPs-mediated abiotic stresses and nutritional improvements in plants has received considerable interest by the scientific community. While significant progress was made in selenium biochemistry in relation to stress tolerance, an in-depth understanding of the molecular mechanisms associated with the selenium- and nano-selenium-mediated stress tolerance and bio-fortification in plants is still lacking. Gaining a better knowledge of the regulatory and molecular mechanisms that control selenium uptake, assimilation, and tolerance in plants is therefore vital and necessary to develop modern crop varieties that are more resilient to environmental stress. This book provides a comprehensive overview of the latest understanding of the physiological, biochemical, and molecular basis of selenium- and nano-selenium-mediated environmental stress tolerance and crop quality improvements in plants. It helps researchers to develop strategies to enhance crop productivity under stressful conditions and to better utilize natural resources to ensure future food security and to reduce environmental contamination. Finally, this book is a valuable resource for promoting future research into plant stress tolerance, and a reference book for researchers working on developing plants tolerant to abiotic and biotic stressors as well as bio-fortification and phytoremediation.

"This book is what a review should be...a complete book on a hugely relevant topic...It is a preview of a new era in agricultural development that brings excitement and vast potential to tackle the challenge of feeding a growing population sustainably." Review in Bio Based Press "In addition to being well written and structured, this book is edited by some of the most prominent authors in the field of biostimulants...It meets the need for a reliable and comprehensive review on current legislation, challenges and peer-reviewed scientific results... a comprehensive guide to the potential roles of the different biostimulant categories in sustainable agriculture." Chronica Horticulturae With increasing concerns about the environmental impact of fertilizers, there is a growing need for the sector to develop more sustainable, 'climate-smart' methods of crop production. Biostimulants have attracted growing attention since they offer the potential to enhance yields through stimulating natural processes in crops. Biostimulants for sustainable crop production provides a comprehensive review of the key advances in understanding and using biostimulants. This collection covers the major groups of biostimulants, from humic substances and seaweed extracts to protein hydrolysates and plant growth-promoting rhizobacteria (PGPR), as well as the practical application of biostimulants in areas such as enhancing nutrient use efficiency (NUE). With its distinguished editors and international range of expert authors, Biostimulants for sustainable crop production will be a standard reference for those researching crop nutrition, government and other bodies supporting more sustainable agriculture as well as agronomists and farmers.

This collection features five peer-reviewed reviews on biostimulant applications in agriculture. The first chapter provides a comprehensive overview of the optimal design and formulation of microbial and non-microbial biostimulants. The chapter presents two case studies to demonstrate the successful commercialisation of microbial and non-microbial biostimulant products. The second chapter considers the utilisation of humic substances (HS) as plant biostimulants in agriculture and their impact on the physical and chemical properties of soil. The chapter also discusses the production of HS. The third chapter reviews the wealth of research on the mechanism of action, applications and efficacy of key biostimulants such as Bacillus species, Pseudomonas species, Trichoderma species and arbuscular mycorrhizal fungi. The fourth chapter assesses recent advances in the use of plant growth-promoting rhizobacteria (PGPR) as a means of enhancing crop root function and nutrient use. The chapter also considers the challenge of practical adoption and use of PGPR in commercial agricultural settings. The final chapter reviews the utilisation of biostimulants as an integrated pest management tool in horticulture. The chapter considers their role in promoting plant growth, building soil structure, as well as pest and disease suppression.