The Role of Salicylic Acid in Activating Plant Stress Responses—Results of the Past Decade and Future Perspectives

Salicylic acid (SA) is one of the most commonly used natural plant protection compounds, considered one of the most effective in mitigating the damage caused by abiotic and biotic stressors. The current review article summarizes the most significant achievements in stress management over the past ten years. We also provide insights into new perspectives on the use of salicylic acid. The article summarizes the role of SA in signaling, its effects on biotic, abiotic and oxidative stress, evaluates the possibilities of its use in combination with other active compounds, and presents the promising application opportunities offered by new techniques that may become available in the coming decades.