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 and J A G Silveira |
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| Institution: | (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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