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International Journal of Morphology

versión On-line ISSN 0717-9502

Resumen

ESPINOZA-NAVARRO, O et al. Alteration of the Reproductive Patterns in Drosophila melanogaster by Effects of High Concentrations of Boron on In Vitro Cultured Medium. Int. J. Morphol. [online]. 2009, vol.27, n.3, pp.765-770. ISSN 0717-9502.  http://dx.doi.org/10.4067/S0717-95022009000300021.

The objective of this study was to evaluate the effects of boron (B) using as a biological model Drosophila malanogaster. Analizing specifically the responses over descendency to doses of 6,0 and 12 mg/L, comparing a control group which culture medium was prepared with water with boron concentrations of 0,6 mg/L, according to World Health Organization. The results show a significative alteration in the number of descendency from F1 to F3 and then a tendency to normalization in F4 and F5. Also a significant change in proportions between the males and females, with an acute effect on F1 and then a possible chronic effect from F2 to F5, increasing the proportion of females over males. This differences between genders are significant only until F4, on F5 these proportions are not significant. In F3 in doses of 12.0 mg/L of boron, it is observed a larger range of changes, altering the phenotypic expression, where the numbers of males which increase their size are significantly higher of those females who increase their size, 10% and 5,2% respectively. There is a tendency to normality in every pattern of study from the descendants of F4 and F5, above all the percentage of survival, possibly due action of steroid hormones of resistance to stress such as "ecdysone hormone".

Palabras clave : Reproduction; Boron; Reproductive toxicology; Drosophila melanogaster.

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