%0 Journal Article
%T Cadmium toxicity causes oxidative stress and induces response of the antioxidant system in cucumber seedlings
%A Gon£¿alves
%A Jamile F.
%A Becker
%A Alexssandro G.
%A Cargnelutti
%A Denise
%A Tabaldi
%A Luciane A.
%A Pereira
%A Luciane B.
%A Battisti
%A Vanessa
%A Spanevello
%A Ros¨¦lia M.
%A Morsch
%A Vera M.
%A Nicoloso
%A Fernando T.
%A Schetinger
%A Maria R.C.
%J Brazilian Journal of Plant Physiology
%D 2007
%I Scientific Electronic Library Online
%R 10.1590/S1677-04202007000300006
%X in this study, the effects of cadmium (cd) on lipid peroxidation, electrolyte leakage, protein oxidation, ascorbate peroxidase (apx; e.c. 1.11.1.11), catalase (cat; e.c. 1.11.1.6) and superoxide dismutase (sod; e.c. 1.15.1.1) activities, and ascorbic acid, non-protein thiol groups and total soluble protein contents in cucumber seedlings (cucumis sativus l.) were investigated. seedlings were grown in vitro in an agar-solidified substrate containing four cd levels as cdcl2 (0, 100, 400, and 1000 ¦̀mol l-1) for 10 d. the lowest cd level decreased the malondialdehyde concentration. electrolyte leakage increased only at 1000 ¦̀mol cd l-1, whereas protein oxidation and total soluble protein content were enhanced at 400 and 1000 ¦̀mol cd l-1. activity of apx was inhibited while the activities of cat and sod were increased at all cd concentrations. ascorbic acid was enhanced at 400 and 1000 ¦̀mol cd l-1 whereas non-protein thiol groups were increased at all cd supplies. the results evidence the importance of the enzymatic and non-enzymatic antioxidant system in response to cadmium toxicity in cucumber seedlings.
%K antioxidant enzymes
%K ascorbic acid
%K cucumis sativus
%K heavy metal
%K lipid peroxidation
%K protein oxidation.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1677-04202007000300006&lng=en&nrm=iso&tlng=en