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Publication Type J
Authors Houmani, H., M. Rodriguez-Ruiz, J. M. Palma, C. Abdelly and F. J. Corpas
Title Modulation of superoxide dismutase (SOD) isozymes by organ development and high long-term salinity in the halophyte Cakile maritima
Source Protoplasma
Author Keywords Cakile maritima Fe-SOD Halophyte SOD isozymes Salt stress induced oxidative stress citrullus-vulgaris schrad amino-acid-sequences salt stress physiological-responses differential response watermelon cotyledons antioxidative enzymes cytosol isozymes nacl stress
Abstract Superoxide dismutase (SOD) activity catalyzes the disproportionation of superoxide radicals into hydrogen peroxide and oxygen. This enzyme is considered to be a first line of defense for controlling the production of reactive oxygen species (ROS). In this study, the number and type of SOD isozymes were identified in the principal organs (roots, stems, leaves, flowers, and seeds) of Cakile maritima. We also analyzed the way in which the activity of these SOD isozymes is modulated during development and under high long-term salinity (400 mM NaCl) stress conditions. The data indicate that this plant contains a total of ten SOD isozymes: two Mn-SODs, one Fe-SOD, and seven CuZn-SODs, with the Fe-SOD being the most prominent isozyme in the different organs analyzed. Moreover, the modulation of SOD isozymes, particularly CuZn-SODs, was only detected during development and under severe salinity stress conditions. These data suggest that, in C. maritima, the occurrence of these CuZn-SODs in roots and leaves plays an adaptive role since this CuZn-SOD isozyme might replace the diminished Fe-SOD activity under salinity stress to overcome this adverse environmental condition.
Author Address [Houmani, Hayet; Rodriguez-Ruiz, Marta; Palma, Jose M.; Corpas, Francisco J.] CSIC, Estn Expt Zaidin, Dept Biochem Cell & Mol Biol Plants, Grp Antioxidants Free Radicals & Nitr Oxide Biote, Apartado 419, E-18080 Granada, Spain. [Houmani, Hayet; Abdelly, Chedly] Ctr Biotechnol Borj Cedria, Lab Extremophile Plants, POB 901, Hammam Lif 2050, Tunisia. Corpas, FJ (reprint author), CSIC, Estn Expt Zaidin, Dept Biochem Cell & Mol Biol Plants, Grp Antioxidants Free Radicals & Nitr Oxide Biote, Apartado 419, E-18080 Granada, Spain. javier.corpas@eez.csic.es
ISSN 0033-183X
ISBN 0033-183X
29-Character Source Abbreviation Protoplasma
Publication Date May
Year Published 2016
Volume 253
Issue 3
Beginning Page 885-894
Digital Object Identifier (DOI) 10.1007/s00709-015-0850-1
Unique Article Identifier WOS:000373578500023
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