Melatonin Confers NaCl Tolerance in L. by Maintaining Na/K Homeostasis, Strengthening the Antioxidant Defense System and Modulating Withanolides Synthesis-Related Genes.

Unlabelled: As a multifunctional signaling molecule, melatonin (ML) is widely considered to induce the defense mechanism and increase the accumulation of secondary metabolites under abiotic stresses. Here, the effects of different concentrations of ML (100 and 200 µM) on the biochemical and molecular responses of L. in hydroponic conditions under 200 mM NaCl treatment were evaluated.