Agricultural science is increasingly focusing on the utilization of biostimulants as a means to enhance plant stress tolerance, which is crucial for crop resilience in the face of climatic challenges. Biostimulants encompass a variety of substances and microorganisms that promote plant growth and enhance stress response through different biochemical and physiological pathways. Despite promising results in boosting plant performance under stress, the mechanisms by which biostimulants exert their effects are not fully detailed. There is a critical need for detailed studies that elucidate how these agents affect plant responses at the molecular, biochemical, and physiological levels, particularly under stress conditions like drought, salinity, and extreme temperatures.

This Research Topic aims to deepen our understanding of the regulatory roles of biostimulants in plant stress tolerance. The primary goals are to identify the key components and pathways influenced by biostimulants, investigate the interaction between biostimulants and plant stress-related hormones, and evaluate the potential of biostimulants to mitigate adverse effects of environmental stresses. By achieving these objectives, research can guide the optimized use of biostimulants in agricultural practices, enhancing crop productivity and sustainability.

To advance knowledge in this critically important area, this Research Topic will focus on innovative studies exploring biostimulant impact and mechanism of action. We welcome submissions dealing with, but not limited to, the following themes:

- Characterization and efficacy testing of biostimulant compounds in enhancing plant resilience to abiotic stresses
- Molecular and physiological mechanisms by which biostimulants confer stress tolerance
- Interaction between biostimulants and plant hormonal pathways during stress conditions
- Field trials evaluating the effectiveness of biostimulant applications under real-world agricultural settings
- The role of biostimulants in promoting overall plant health and yield under stress scenarios

Contributions in the form of original research, reviews, and case studies are encouraged to explore these and related areas, offering insights into the potential of biostimulants in modern agriculture.

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Regulation of Stress Tolerance in Plants by Biostimulants