(±)-Jasmonic Acid

(±)-Jasmonic Acid (CAS No.: 77026-92-7) is an endogenous lipid-derived plant growth regulator belonging to the jasmonate family, biosynthetically derived from α-linolenic acid and widely studied for its central role in plant stress physiology and signaling networks. It functions as a key mediator of defense responses to mechanical wounding, herbivory, and pathogen challenge, acting within a complex hormonal crosstalk system that integrates pathways such as salicylic acid and ethylene signaling rather than operating as an isolated regulator. In vitro and physiological studies demonstrate that (±)-jasmonic acid modulates plant development and metabolism in a concentration-dependent manner, including reduction of chlorophyll content in green and etiolated tissues at low micromolar concentrations and inhibition of seedling elongation across a micromolar range, while higher micromolar levels can enhance germination of certain parasitic plant species. Mechanistically, its activity is associated with transcriptional reprogramming through jasmonate-responsive gene expression and downstream activation of defense-related proteins and secondary metabolite pathways. In research settings, (±)-jasmonic acid is widely applied as a tool compound to dissect stress-response signaling, evaluate plant–environment interactions, and model hormone-driven regulatory networks, with experimental concentrations or treatment regimens adjusted according to specific cell-based assays, whole-plant studies, or agricultural biotechnology objectives.