PPROTOPLASMA4/2/2026

Osmotic stress and melatonin in Pfaffia glomerata: biochemical responses and 20-hydroxyecdysone modulation

Osmotic stress, driven by factors such as soil drying and salinization, poses a significant challenge to plant growth and metabolism. Melatonin has shown promising results in alleviating abiotic stress by inducing antioxidant defenses in several species, which is particularly interesting when considering medicinal plants. Thus, this study investigates the physiological and biochemical responses of Brazilian-ginseng (Pfaffia glomerata) to PEG 4000-induced osmotic stress and the mitigating effects