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Lookup NU author(s): Professor Christine Foyer
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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.
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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