Lead Acetate Action in Embrionic Developmental Pattern of Gallus domesticus
DOI:
https://doi.org/10.5132/jbse.2006.01.018Keywords:
lead, toxicity, embrionic development, Gallus domesticus, morphological alterationsAbstract
The contamination for lead has its origin mainly in the atmospheric emissions, being the air considered one of the main ways of transport and distribution of this heavy metal in the environment. Lead toxicicity in embryos and young individuals is very expressive, and can commitment the structural and functional pattern of species. Studies have demonstrated that only one exposition to lead in chick embryos, depending on the ingested dose, can result in malformations of face and limbs, hidrocefaly and reduction in the eclosion rate. The objective of this work was analized embryos of Gallus domesticus exposed to lead acetate in order to verify the commitment of the embryonic pattern as well as the teratologic actions of the metal. Studies in the Laboratório de Reprodução e Desenvolvimento Animal/UFSC had been carried through, where 143 embryos of Gallus domesticus had been exposed to lead acetate in the doses: 150 μg, 250 μg, 350 μg and 450 μg. The control group (n = 47) has received 0.1 ml saline solution in the same days. The embryos had been treated in 3rd or in 5rd day, monitorated during six days, when the integrity of the embryonic structures was evaluated. Of the total of individuals treated with lead acetate, 27 presented the normal pattern, 34 died and 82 had alterated the developmental pattern (developmental delay (3), malformations (14), hemorrhagic alterations (65)). Our studies show that the lead acetate in the doses utilizated modified the morphogenesis processes, causing characteristic morphological alterations, awareing to the use and the release of this metal in the environment.
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