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

Lookup NU author(s): Professor Christine Foyer

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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.

Publication metadata

Author(s): Foyer CH; Mittova V; Kiddle G; Theodoulou FL; Gomez L; Volokita M; Tal M; Guy M

Publication type: Article

Publication status: Published

Journal: FEBS Letters

Year: 2003

Volume: 554

Issue: 3

Pages: 417-421

ISSN (print): 0014-5793

ISSN (electronic): 1873-3468

Publisher: Elsevier BV

URL: http://dx.doi.org/10.1016/S0014-5793(03)01214-6

DOI: 10.1016/S0014-5793(03)01214-6

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