Genetic effects observed in tetrads of Tradescantia induced by radon
Inflorescences of Tradescantia clone 4430 were exposed to different concentrations of radon (Rn) gas (0.85, 12.10, 36.50 and 98.16 kBq/m(3)) from plants placed in an acrylic chamber that received radon from a container with pitchblende (containing uranium mineral). The exposure time was 24 h, afterw...
| Autores: | , , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1999 |
| País: | México |
| Recursos: | Universidad Nacional Autónoma de México |
| Repositorio: | Sistema de Información de la Facultad de Ciencias, UNAM |
| OAI Identifier: | oai:repositorio.fciencias.unam.mx:11154/3312 |
| Acesso em linha: | http://hdl.handle.net/11154/3312 |
| Access Level: | acceso abierto |
| Palavra-chave: | Biotechnology & Applied Microbiology Genetics & Heredity Toxicology micronuclei tetrad alpha particle radon genetic effect pitchblende Tradescantia |
| Resumo: | Inflorescences of Tradescantia clone 4430 were exposed to different concentrations of radon (Rn) gas (0.85, 12.10, 36.50 and 98.16 kBq/m(3)) from plants placed in an acrylic chamber that received radon from a container with pitchblende (containing uranium mineral). The exposure time was 24 h, afterwards the plants were left for 6 h in water and constantly aerated. Positive control plants were irradiated with gamma rays (0.8 Gy) and negative control plants received ambient air only (the background measurement had a mean of 0.38 kBq/m(3)). Micronuclei (MCN) in the tetrads induced by a particles emitted from Rn were tabulated and a linear concentration response was obtained. The potency of radon to induce MCN from the slope of the regression line was 0.13 MCN/kBq/m(3) of alpha-radiation. Radon could reach the anthers by diffusion through the aerial spaces within the buds. (C) 1999 Elsevier Science B.V. All rights reserved. |
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