Chromosomal Mapping of Rex Retrotransposons in Tambaqui (Colossoma macropomum Cuvier, 1818) Exposed to Three Climate Change Scenarios
| Autor: | Alex M.V. Ferreira, Daniele Aparecida Matoso, Eliana Feldberg, Leandro Marajó, Leila Braga Ribeiro |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0303 health sciences biology Heterochromatin Tambaqui Chromosome Zoology Climate change Retrotransposon biology.organism_classification 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Greenhouse gas Genetics Gradual increase Microcosm Molecular Biology Genetics (clinical) 030304 developmental biology |
| Zdroj: | Cytogenetic and Genome Research. 159:39-47 |
| ISSN: | 1424-859X 1424-8581 |
| DOI: | 10.1159/000502926 |
| Popis: | Greenhouse gas emissions are known to influence the planet's temperature, mainly due to human activities. To allow hypothesis testing, as well as to seek viable alternatives for mitigation, the Intergovernmental Panel on Climate Change (IPCC) suggested 3 main scenarios for changes projected for the year 2100. In this paper, we subjected Colossoma macropomum Cuvier, 1818 (tambaqui) individuals in a microcosm to IPCC scenarios B1 (mild), A1B (intermediate), and A2 (extreme) to test possible impacts on their genome. We found chromosome heterochromatinization in specimens exposed to the A2 scenario, where terminal blocks and interstitial bands were detected on several chromosome pairs. The behavior of Rex1 and Rex3 sequences differed between the test scenarios. Hybridization of Rex1 resulted in diffuse signals which showed a gradual increase in the tested scenarios. For Rex3, an increase was observed in the A2 scenario with blocks on several chromosomes, some of which coincided with heterochromatin. Heterochromatinization is an epigenetic process, which may have occurred as a mechanism for regulating Rex3 activity. The signal pattern of Rex6 did not change, suggesting that other mechanisms are acting to regulate its activity. |
| Databáze: | OpenAIRE |
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