Nitroguanidine (NG) and its degradation product nitrosoguanidine (NSG) were evaluated for their mutagenic potential by using Drosophila melanogaster sex-linked recessive lethal (SLRL) assay. Following 72 h of feeding exposure, NG and NSG at concentrations of 4-8 pg ml-' and 15-20 mg ml-I, respective
Genotoxicity of metacid established through the somatic and germ line mosaic assays and the sex-linked recessive lethal test in drosophila
โ Scribed by N. K. Tripathy; L. Dey; B. Majhi; C. C. Das
- Publisher
- Springer-Verlag
- Year
- 1987
- Tongue
- English
- Weight
- 473 KB
- Volume
- 61
- Category
- Article
- ISSN
- 0340-5761
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โฆ Synopsis
The mutagenic potential of metacid (methyl parathion), an anticholinesterase organophosphate pesticide, has been studied in the Drosophila eye, wing and female germ line assays and the sex-linked recessive lethal tests. Larvae 24 h, 48 h and 72 h old, heterozygous for various recessive genetic markers on the first and third chromosomes, were exposed to the LD50 and half of this dose for different periods of time. The eyes and wings were checked for the presence of mosaic spots and eggs laid by the females for germ line mosaicism. The M-5 technique was used to detect the induction of sex-linked recessive lethals. It is concluded that metacid is mutagenic in somatic and germ line cells of Drosophila and induces sex-linked recessive lethals in immature male germ cells.
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The former US. EPA OPPT tiered test scheme for heritable gene mutations included the Drosophila sex-linked recessive lethal (SLRL) test in which positive results triggered the mouse specific locus (MSL) test. However, review of available literature indicated that the evaluation of mutations in the g