Melatonin and Nitrogen Applications Modulate Early Growth and Related Physio-biochemical Attributes in Maize Under Cd Stress

Melatonin is effective in modulating plant metabolism under stress conditions whereas nitrogen (N) essential for growth. To explore the effects of melatonin and N applications on early growth, associated physiological biochemical traits, cadmium (Cd) uptake maize Cd stress, a pot experiment was conducted. Two levels, i.e., 0 200 μM, two 1/4 full dose Kimura nutrient solution, were employed widely cultivated varieties, Yuecainuo 2 Yuebaitiannuo 7, (150 μM). Results showed that application improved biomass seedling especially low treatment which further activated antioxidant defense system terms superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) while variably affected activities antioxidants stress. In addition, enzymes involved as well resulted higher concentration shoot root seedlings both varieties. Overall, short-term marginal decrease growth with accumulation, could accelerate improve absorption seedlings.