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Mercury content and distribution as well as its effects on growth and oxidative stress were investigated in 30-day-old tomato seedlings (Lycopersicon esculentum Mill.). The content of Hg increased with external Hg concentrations, and was considerably higher in roots than in shoots. Among the leaves, the mature leaves accumulated more. Excess Hg suppressed biomass production of both roots and shoots...
To investigate the antioxidant defense system, chilling stress-induced changes of antioxidant enzymes were examined in the leaves of cucumber (Cucumis sativus L.). Chilling stress preferentially enhanced the activities of the superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione reductase (GR) and peroxidase specific to guaiacol, whereas it induced the decrease of catalase activity....
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