Coordinate induction of glutathione biosynthesis and glutathione- metabolizing enzymes is correlated with salt tolerance in tomato

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Abstract

The acclimation of reduced glutathione (GSH) biosynthesis and GSH-utilizing enzymes to salt stress was studied in two tomato species that differ in stress tolerance. Salt increased GSH content and GSH:GSSG (oxidized glutathione) ratio in oxidative stress-tolerant Lycopersicon pennellii (Lpa) but not in Lycopersicon esculentum (Lem). These changes were associated with salt-induced upregulation of γ-glutamylcysteine synthetase protein, an effect which was prevented by preincubation with buthionine sulfoximine. Salt treatment induced glutathione peroxidase and glutathione-S-transferase but not glutathione reductase activities in Lpa. These results suggest a mechanism of coordinate upregulation of synthesis and metabolism of GSH in Lpa, that is absent from Lem. © 2003 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.

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Mittova, V., Theodoulou, F. L., Kiddle, G., Gómez, L., Volokita, M., Tal, M., … Guy, M. (2003). Coordinate induction of glutathione biosynthesis and glutathione- metabolizing enzymes is correlated with salt tolerance in tomato. FEBS Letters, 554(3), 417–421. https://doi.org/10.1016/S0014-5793(03)01214-6

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