<p>Methyl jasmonate (MeJA), a signal molecule, plays an essential role in growth, development and defense responses in various plants. However, its role in ryegrass in the response to salt (NaCl) and/or cadmium (Cd) stress remains poorly understood. In this study, the role of exogenous MeJA in alleviating NaCl and Cd-induced toxicity in ryegrass was investigated. According to the results, MeJA application increased the shoot dry weight in NaCl, Cd, Cd + NaCl stressed ryegrass by 5.66%, 7.49% and 12.84%, meanwhile, the root dry weight increased by 12.59%, 4.87% and 13.85%, respectively. Besides, MeJA significantly increased the chlorophyll and carotenoid content in leaves of the stressed ryegrass. It also resulted in lower levels of H₂O₂, O₂⁻ and MDA accumulation via enhancing the antioxidant contents (AsA, GSH, total phenols and flavonoids) and antioxidant enzymes (POD, CAT, APX) activities. Moreover, foliar application of MeJA elevated the soluble protein, soluble sugar content and stimulated mineral nutrient (Mg, K, Ca, Fe, Cu and Zn) uptake while decreased Na⁺ and Cd²⁺ accumulation. Therefore, MeJA could help to alleviate salt and/or Cd induced toxicity in ryegrass and act as a helpful tool for improving plant performance under salt and/or Cd stress.</p>