Antioxidative enzymatic protection in leaves of two contrasting cowpea cultivars under salinity

作者：Maia J M; Costa de Macedo C E; Voigt E L; Freitas J B S; Silveira J A G^*

来源：Biologia Plantarum, 2010, 54(1): 159-163.

DOI：10.1007/s10535-010-0026-y

• ascorbate peroxidase
• oxidative damage
• peroxidase
• salt stress
• salt tolerance
• superoxide dismutase
• Vigna unguiculata

The aim of this work was to investigate the role of the antioxidant enzymes in salt tolerance comparing the salt-sensitive (Perola) and a salt-tolerant (Pitiuba) 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.

• 出版日期2010-3