Genotoxic quality of water and soil in the region of Teboulba

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This study is conducted in the region of Teboulba in order to assess the genotoxic quality of water from 5 wells used in irrigation.

This evaluation also concerned the soils irrigated by these waters through their leachates.

The physicochemical analyses revealed basic waters with a strong to excessive salinity (3.60 - 7.2 dS/m) dominated by Na+ and Cl- and an excess of Cd, Cr, Fe, Ni and Pb contents of the NT19-04 standard.

The application of the Vicia-micronucleus Test did not result in a significant change in growth parameters and membrane integrity.

However, a remarkable damage of the cell genome was noted through a significant decrease of the cell division and an appearance of micronucleated cells.

The same effects were also observed in the leachates from well water irrigated soils.

These leachates have a low salinity (0.21-1.82 dS/m).

The different treatments used resulted in several aberrations affecting the structure and number of chromosomes.

Other abnormalities including polyploidy, dividing micronucleated cells and nuclear aberrations were also observed.

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Dalila Souguir, Researcher at the Institut National de Recherches en Génie Rural, Eaux et Forêts-Tunisie and member of the laboratory "Valorisation des Eaux Non-Conventionnelles".

She is interested in the effects of salt water/treated wastewater irrigation on the plant, the soil and the water table.

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