Assessing of tolerance to metallic and saline stresses in the halophyte Suaeda fruticosa: The indicator role of antioxidative enzymes

摘要: Abstract Many areas are simultaneously affected by high concentrations of salts and trace metal elements (TME), the latter constituting a serious threat to human health. In present study, we determined combined effect salinity toxic levels on physiological behavior halophytic species Suaeda fruticosa. Plants were cultivated for three months with an irrigation solution supplemented separately different Pb2+ Zn2+ (0, 200, 400 600 μM) without 200 mM NaCl. Growth, total chlorophyll, water status ion nutrition quantified antioxidant enzyme activities [ascorbate peroxidase (APX), guaiacol (GPX), catalase (CAT)] studied. Our results revealed that S. fruticosa has strong ability tolerate lead zinc. This halophyte accumulated higher TME in their roots. Growth parameters not significantly TME. An enhancement Ca2+ concentration accompanied decrease Mg2+ content was observed under or treatments whereas K+ Of enzymes, activity CAT APX increased stress. However, GPX diminished increasing concentrations. It concluded NaCl had positive impact response toxicity, acting through Zn absorption.