Glutathione and phytochelatin contents in tomato plants exposed to cadmium |
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Authors: | W Ben Ammar C Mediouni B Tray M H Ghorbel F Jemal |
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Institution: | (1) Faculté des Sciences de Tunis, Campus Universitaire, 1060 Tunis, Tunisia |
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Abstract: | The effect of cadmium on growth and contents of glutathione (GSH) and phytochelatins (PCs) were investigated in roots and
leaves of tomato plants (Lycopersicon esculentum Mill. cv. 63/5 F1). The accumulation of Cd increased with external Cd concentrations and was considerably higher in roots
than in leaves. Dry mass production decreased under Cd treatment especially in leaves. In both roots and leaves, exposure
to Cd caused an appreciable decline in GSH contents and increase in PCs synthesis proportional to Cd concentrations in the
growth medium. At the same Cd concentration, PCs production was higher in roots than in leaves. The implication of glutathione
in PC synthesis was strongly suggested by the use of buthionine sulfoximine (BSO). The major fraction of Cd accumulated by
tomato roots was in the form of a Cd-PCs complex. |
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Keywords: | Additional" target="_blank">Additional buthionine sulfoximine complex Cd-PC Lycopersicon esculentum |
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