Linking the interaction of Salicylates and Jasmonates for stress resilience in plants

Abstract

Plants are continuously exposed to environmental abiotic and biotic stressors that can significantly impact their growth, development, productivity, and lifespan. However, plants have developed exceptionally complex signaling pathways that enable their ability to sense, transduce, and respond to these diverse stress stimuli. Salicylates (SA) and jasmonates (JA) are two key phytohormones that significantly influence plant adaptation to environmental and biotic stressors, pivotal in enhancing stress resilience. The interaction and crosstalk between SA and JA signaling cascades are essential for orchestrating appropriate physiological and biochemical responses to biotic (e.g., pathogen attack, herbivory) and abiotic (e.g., oxidative stress, drought, temperature extremes, UV radiation, salinity, heavy metal toxicity) stresses. Salicylates are primarily recognized for being involved in systemic acquired resistance (SAR) against biotic stressors like pathogens. Conversely, jasmonates are well-documented in their function in defenses aimed at herbivorous insects and in mitigating the outcomes of abiotic conditions such as salinity and drought. However, the crosstalk between SAs and JAs is complex, involving both synergistic and antagonistic interactions that finely tune the natural defensive mechanism of the plant toward both biotic and abiotic stresses. This comprehensive review summarizes the most recent research on how SA and JA biosynthesis, signaling, and interactions govern diverse stress adaptive mechanisms in plants. It covers emerging evidence on the importance of SA-JA crosstalk in regulating physiological, biochemical, and molecular adaptations to combined biotic and abiotic stresses.

Keywords

Salicylate (SA) / Jasmonate (JA) / SA-JA crosstalk / Stress resilience / Biotic and abiotic stress / Molecular pathways

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