0000000000636709
AUTHOR
M. R. Lo Conte
ChemInform Abstract: Chemically Induced Chromosome Damage in Early-Developing Embryos of Anilocra Physodes L. (Crustacea, Isopoda) Following Exposure to Bis( dimethyltin(IV)chloro)protoporphyrin IX.
In order to obtain chromosome preparations from early-developing embryos of Anilocra physodes, a squash technique has been successfully employed. Results gathered after exposure of this material to bis[dimethyltin(IV)chloro]protoporphyrin IX {[(CH3)2SnCl]2 - Protoporphyrin IX} solutions at different exposure times suggest that this chemical complex is capable of producing abnormal metaphase and anaphase figures in proportion to its concentration and not to exposure length. Essentially, all of the chromosome abnormalities are classifiable as chromosome fragments mainly observed at the metaphase stage; chromosome bridges; and large decondensed chromosome regions.
Intra-populational and intra-individual mosaicisms of Uranoscopus scaber L. (Perciformes, Uranoscopidae)
Intra-populational and intra-individual mosaicisms of Uranoscopus scaber L. (Perciformes, Uranoscopidae)
Chemically induced chromosome damage in early-developing embryos ofAnilocra physodes L. (Crustacea, Isopoda) following exposure to bis[Dimethyltin(IV)Chloro]protoporphyrin IX
In order to obtain chromosome preparations from early-developing embryos of Anilocra physodes, a squash technique has been successfully employed. Results gathered after exposure of this material to bis[dimethyltin(IV)chloro]protoporphyrin IX {[(CH3)2SnCl]2 - Protoporphyrin IX} solutions at different exposure times suggest that this chemical complex is capable of producing abnormal metaphase and anaphase figures in proportion to its concentration and not to exposure length. Essentially, all of the chromosome abnormalities are classifiable as chromosome fragments mainly observed at the metaphase stage; chromosome bridges; and large decondensed chromosome regions.
Karyotype analysis, nucleolar organizer regions(NORs), and C-banding pattern of Dicentrarchus iabrax(L.) and Dicentrarchus punctatus(Block, 1792)(Pisces, Perciformes) with evidence of chromosomal structural polymorphism.
Chromosomes of Dicentrarchus labrax and Dicentrarchus punctatus collected from the Gulf of Palermo are examined from kidney cells. The diploid chromosome number in both species is 2n=48. Ag-NOR and C-banding analyses revealed the presence of structural chromosomal polymorphism involving pair 1.A comparative analysis among the Giemsa, NOR- and C-banded karyotypes suggests that a close phylogenetic relationship between D. labrax and D. punctatus occurs. There are evidences for a conservative evolutionary trend in this genus.