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	Provedor de dados BABT (1) Autor Almeida,Carlos E. Bonacossa de (1) Gomes,Heliana de Azevedo (1) Mezrahi,Arnaldo (1) Nouailhetas,Yannick (1) Rodrigues,Geraldo Stachetti (1) Silva,Nivaldo Carlos da (1) Mais... Palavra-chave Bioassay (1) Mutagenesis (1) Natural radiation (1) Tradescantia (1) Tipo do documento Info:eu-repo/semantics/article (1) Ano 2002 (1) País Brazil (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Biological Response of Tradescantia Stamen-hairs to High Levels of Natural Radiation in the Poços de Caldas Plateau BABT Gomes,Heliana de Azevedo; Nouailhetas,Yannick; Silva,Nivaldo Carlos da; Mezrahi,Arnaldo; Almeida,Carlos E. Bonacossa de; Rodrigues,Geraldo Stachetti. 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 muR.min-1 up to 100.0 muR.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... Tipo: Info:eu-repo/semantics/article Palavras-chave: Mutagenesis; Natural radiation; Bioassay; Tradescantia. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000300008 Registros recuperados: 1 Primeira ... 1 ... Última

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