Data/hora: 23/09/2024 15:11:24

Biblioteca(s): 	Embrapa Meio Ambiente.	
Data corrente: 	28/01/2019	
Data da última atualização: 	28/01/2019	
Autoria: 	GOMES, H. de A.; YANNICK NOUAILHETAS; SILVA, N. C. da; ARNALDO MEZRAHI; CARLOS E. BONACOSSA de ALMEIDA; RODRIGUES, G. S.	
Afiliação: 	HELOISA DE AZEVEDO GOMES, CNEN - Comissão Nacional de Energia Nuclear; NOUAILHETAS, Y., Coordenação de Instalações Nucleares/RJ; NIVALDO CARLOS DA SILVA, CNEN - Comissão Nacional de Energia Nuclear; MEZRAHI, A., Coordenação de Instalações Nucleares/RJ; ALMEIRA, C. E. B. de, Coordenação de Instalações Nucleares/RJ; GERALDO STACHETTI RODRIGUES, CNPMA.	
Título: 	Biological response of tradescantia stamen-hairs to high levels of natural radiation in the Poços de Caldas plateau.	
Ano de publicação: 	2002	
Fonte/Imprenta: 	In: Brazilian Archives of Biology and Technology. Curitiba, v.45, n.3, , Sep. 2002.	
Páginas: 	p. 301-307	
Idioma: 	Inglês	
Conteúdo: 	The objective of the present study was to apply a highly sensitive botanical test of mutagenicity (the Tradescantia stamen-hair mutation bioassay) to assess in situ the biological responses induced by naturally occurring radiation in the Poços de Caldas Plateau. The mutagenesis was evaluated in environments presenting gamma radiation exposure rates ranging from 1.5 mR.min-1 up to 100.0 mR.min-1. The results consistently showed only borderline increases in mutation frequencies in plants exposed to areas with high radiation background, as compared to non-exposed plants. It was concluded that the levels of natural radiation prevalent in the Poços de Caldas Plateau were not sufficient to induce significant increases in mutation rate, even in the extremely sensitive Tradescantia stamen hair mutation bioassay and mutagenesis evaluation test could be a useful monitoring system for natural radiation exposure.	
Palavras-Chave: 	Biological; Radiação natural.	
Thesaurus Nal: 	Tradescantia.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/191402/1/Rodrigues-Biological-Response-of-Tradescantia-Stamen-hairs-t-1.pdf	
Registro original: 	Embrapa Meio Ambiente (CNPMA)	
Exemplares: 	CNPMA - (16341-1) - UPC - AP - DD -  -  -  - DIS