Biologia Plantarum

, 52:314 | Cite as

Glutathione and phytochelatin contents in tomato plants exposed to cadmium

  • W. Ben Ammar
  • C. Mediouni
  • B. Tray
  • M. H. Ghorbel
  • F. Jemal
Original Papers

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.

Additional key words

buthionine sulfoximine complex Cd-PC Lycopersicon esculentum 

Abbreviations

BSO

buthionine sulfoximine

GSH

glutathione

NPT

nonprotein thiol

PCs

phytochelatins

TBARS

thiobarbituric acid reactive substances

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Copyright information

© Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Praha 2008

Authors and Affiliations

  • W. Ben Ammar
    • 1
  • C. Mediouni
    • 1
  • B. Tray
    • 1
  • M. H. Ghorbel
    • 1
  • F. Jemal
    • 1
  1. 1.Faculté des Sciences de TunisCampus UniversitaireTunisTunisia

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