Antioxidative system in maize roots as affected by osmotic stress and different nitrogen sources

摘要: The activities of antioxidative enzymes and contents proline total phenolics were assayed in roots two maize (Zea mays L.) genotypes grown a medium containing nitrate (NO3−) or both nitrogen forms, ammonium (NH4+/NO3−). An increase the class III peroxidases (POD), superoxide dismutase (SOD), ascorbate peroxidase (APX), oxidase (AO) content, decrease phenolic content observed NH4+/NO3− comparison with NO3− plants. When polyethylene glycol (PEG) was added to treatments, increased, especially treatment. PEG treatment decreased enzyme plants, but plants POD SOD opposite APX AO. Isoelectric focusing demonstrated increased acidic isoforms treated lower both, basic NH4+/NO3−grown