دراسة التأثيرات السمية الوراثية و الخلوية للمبيد الحشري dichlorvos في جذور نبات البصل allium cepa L.

الملخص EN

The study was carried out to investigate the effect of different concentrations of the insecticide Dichlorovos (C4H7CL2O4P) in the root tips meristematic cells of Allium cepa using different concentrations 0.1,0.2,0.3 and 0.4 ml/l.

The chromosomal aberrations types and the mitotic index studied.

The increased concentrations of Dichlorovos caused significant decrease of the number of dividing cells and phases in comparison with the control group and that leads to drastic effect on the mitotic cells.

The insecticide induced different types of chromosomal aberrations (chromosomal bridges, late chromosomes and broken bridges) significantly (p˂0.5) using the concentrations 0.1, 0.2 ml/l and the positive control, on the other hand the concentrations 0.3,0.4 ml/l showed the least aberrations, whereas the positive control induced chromosomal fragments, lagging chromosomes and granular prophase in comparison with the other insecticide concentrations.