Abstract
2-weeks-old wheat plants were exposed to metronidazole by transferring to Hoagland solutions containing between 10 and 100 mg antibiotic per liter. Plants evaluation after 7 days of treatment revealed a moderate inhibition of their growth at high concentrations of metronidazole, whose probability of appearing in natural environments is low. Biochemical parameters, such as the activity of soluble peroxidases, and the concentration of soluble proteins and glucose in the roots of the plants, didn’t show wide variations in the metronidazole exposed plants compared to the non-exposed ones. Also, leaf chlorophylls and carotenoids concentrations didn’t differ markedly in the exposed plants compared to the unexposed ones, although a redistribution of the pigments in the leaf was noticed. Thus, we concluded that wheat plants didn’t experience a major stress, probably due to the limited absorption and activation of metronidazole.
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