| Effect of environmental pollution on the chromosomal variability of Chironomus riparius Meigen 1804 (Diptera, Chironomidae) larvae from two Piedmont stations. | |
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MedLine Citation:
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PMID: 11138945 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Different frequencies of chromosomal alterations in salivary gland polytene chromosomes AB, CD and EF were described in larvae of Chironomus riparius (syn. Chironomus thummi) from the trace metal-polluted station of Santena on the river Banna, near Turin, and from the unpolluted station of Corio (40 Km from Turin) which was taken as a reference area. In a sample of 56 larvae from Santena, no specimen with the standard karyotype in all cells of the salivary glands was found. Different types of aberrations were found: 33 paracentric and five pericentric inversions, three deficiencies, four amplified sections and one chromatid break. Fifteen out of the 38 inversions and two amplified sections appeared to be inherited, while all the other aberrations were somatic. Most of the aberrations' breakpoints were located on both sides of the centromere regions, where constitutive heterochromatin is present. Also functional alterations were observed (mainly telomere and centromere decondensations and nine novel puffs). In a sample of 49 larvae of a population from the well-preserved area of Corio only six somatic and one inherited paracentric inversions were found. These results suggest that the strong destabilization of the genomes of C. riparius larvae from Santena could be a reaction to the activity of the toxic substances present in the polluted sediments of the river Banna. |
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Authors:
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P Michailova; N Petrova; S Bovero; O Cavicchioli; L Ramella; G Sella |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Genetica Volume: 108 ISSN: 0016-6707 ISO Abbreviation: Genetica Publication Date: 2000 |
Date Detail:
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Created Date: 2001-01-02 Completed Date: 2001-03-15 Revised Date: 2009-11-19 |
Medline Journal Info:
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Nlm Unique ID: 0370740 Medline TA: Genetica Country: Netherlands |
Other Details:
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Languages: eng Pagination: 171-80 Citation Subset: IM |
Affiliation:
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Institute of Zoology, Bulgarian Academy of Sciences of Sofia. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Chironomidae / genetics* Chromosome Aberrations* Chromosome Inversion Chromosomes / genetics, ultrastructure Congenital Abnormalities / genetics Environmental Monitoring Environmental Pollutants / toxicity Environmental Pollution / adverse effects* Geologic Sediments Italy Larva Metals, Heavy / toxicity |
| Chemical | |
Reg. No./Substance:
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0/Environmental Pollutants; 0/Metals, Heavy |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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