Abiotic Stresses, Biostimulant and Plant Activity—Series II

Biotic and abiotic stresses, intensified by climate change, pose significant challenges to cropping systems by reducing both productivity and product quality. With the global population steadily increasing, agriculture must adopt sustainable practices and strategies to meet the rising demand for food while mitigating the impacts of these stresses. Salt, drought, and heat stress have the most severe impacts on agricultural systems, making it essential to implement sustainable measures to enhance crop resilience and ensure stable or improved production. Biostimulants have garnered growing attention for their ability to boost plant stress tolerance, productivity, and product quality in an economically and environmentally sustainable manner. These materials primarily enhance plant performance, nutrient acquisition and use efficiency, and end-product quality traits. Within this frame, this Special Issue collates research on the role of biostimulants and other innovative materials and techniques for promoting plant growth, yield, and product quality under abiotic stress conditions. This Special Issue also investigates the mechanisms of action of biostimulants, highlighting their economic and environmental benefits. Additionally, it examines novel substances with biostimulant properties, broadening the scope of sustainable solutions for modern agriculture.