Antioxidative enzymatic protection in leaves of two contrasting cowpea cultivars under salinity |
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| Authors: | J. M. Maia C. E. Costa de Macedo E. L. Voigt J. B. S. Freitas J. A. G. Silveira |
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| Affiliation: | (1) Physiologie et Biochimie de la Tol?rance au Sel des Plantes, Facult? des Sciences de Tunis, Campus Universitaire, 2092 Tunis El Manar, Tunisia;(2) Laboratoire d’Adaptation des Plantes aux Stress Abiotiques, Centre de Biotechnologie de Borj-Cedria, Ecopark of Borj-Cedria, BP 901, 2050 Hammam-Lif, Tunisia |
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| Abstract: | ![]()
The aim of this work was to investigate the role of the antioxidant enzymes in salt tolerance comparing the salt-sensitive (Pérola) and a salt-tolerant (Pitiúba) cultivar of cowpea [Vigna unguiculata (L.) Walp.]. Salt stress (100 mM NaCl for 8 d) reduced the leaf growth rate more in the sensitive cultivar. The salt-induced decrease in the relative water content, Na+ accumulation and increase in leaf electrolyte leakage was similar in both cultivars. Salt stress induced a higher increase in the activities of superoxide dismutase (SOD), ascorbate peroxidase (APX) and phenol peroxidase (POX) in the tolerant cultivar than in sensitive one. |
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