Fungicides are recognized as non-toxic compounds, or have a weak ecotoxicological risks. The use of these products is responsible for an important part of the increase of the cereals output. However, the exhibition of the consumers to residues in food remained especially preoccupying with regard to some metabolites that put more problems in relation with the human health. In our work we investigate the effects of the propiconazole (Tilt 250 EC) at three concentrations 35, 70, 140 and 280 µM, on some parameters of the growth and on the respiratory metabolism of roots isolated from two varieties of wheat: the Vitron and GTA variety. Our results show that Tilt 250 EC inhibits strongly the number and the length of the roots of GTA variety, but there are no effects on Vitron variety roots. The respiratory metabolism results of isolated roots show that in Vitron variety there is an enhancement of breathing (about 25%), contrarily in GTA variety where we observe a reduction in respiration rate (about 100%).
Key words: Propiconazole, tilt 250EC, wheat; Triticum durum, GTA, vitron.
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