biologia plantarum

International journal on Plant Life established by Bohumil Nìmec in 1959

Biologia plantarum 56:172-176, 2012 | DOI: 10.1007/s10535-012-0037-y

Partial oxidative protection by enzymatic and non-enzymatic components in cashew leaves under high salinity

S. L. Ferreira-Silva1, E. L. Voigt2, E. N. Silva1, J. M. Maia2, T. C. R. Aragão1, J. A. G. Silveira1,*
1 Departamento de Bioquímica e Biologia Molecular, Instituto Nacional de Ciência e Tecnologia em Salinidade, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
2 Departamento de Biologia Celular e Genética, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, RN, Brasil

The work evaluated the role of enzymatic and non-enzymatic antioxidants in cashew (Anacardium occidentale) leaves under 0, 50, 100, 150 and 200 mM NaCl. Salt stress increased protein oxidation and decreased the lipid peroxidation, indicating that lipids are less susceptible to oxidative damage. The superoxide dismutase (SOD) activity was not changed, ascorbate peroxidase (APX) activity steadily decreased while the catalase (CAT) activity strongly increased with the increasing NaCl concentration. High salinity also induced alterations in the ascorbate (AsA) and glutathione (GSH) redox state. The salt resistance in cashew may be associated with maintaining of SOD activity and upregulation of CAT activity in concert with the AsA and GSH antioxidants.

Keywords: Anacardium occidentale; antioxidative enzymes; ascorbate peroxidase; catalase; NaCl; oxidative stress; superoxide dismutase
Subjects: ascorbate peroxidase; catalase; NaCl; oxidative stress; superoxide dismutase; water content; lipid hydroperoxides; hydrogen peroxide; protein; potassium; ascorbate; glutathione

Received: October 7, 2010; Accepted: February 15, 2011; Published: March 1, 2012  Show citation

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Ferreira-Silva, S.L., Voigt, E.L., Silva, E.N., Maia, J.M., Aragão, T.C.R., & Silveira, J.A.G. (2012). Partial oxidative protection by enzymatic and non-enzymatic components in cashew leaves under high salinity. Biologia plantarum, 56(1), 172-176. doi: 10.1007/s10535-012-0037-y
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