Data/hora: 13/06/2024 02:29:12

Provedor de dados: | 52
País: | Brazil
Título: | Biological Response of Tradescantia Stamen-hairs to High Levels of Natural Radiation in the Poços de Caldas Plateau
Autores: | Gomes,Heliana de Azevedo; Nouailhetas,Yannick; Silva,Nivaldo Carlos da; Mezrahi,Arnaldo; Almeida,Carlos E. Bonacossa de; Rodrigues,Geraldo Stachetti.
Data: | 2002-09-01
Ano: | 2002
Palavras-chave: | Mutagenesis; Natural radiation; Bioassay; Tradescantia.
Resumo: | 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 sensitive Tradescantia stamen hair mutation bioassay and mutagenesis evaluation test could be a useful monitoring system for natural radiation exposure.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000300008
Editor: | Instituto de Tecnologia do Paraná - Tecpar
Relação: | 10.1590/S1516-89132002000300008
Formato: | text/html
Fonte: | Brazilian Archives of Biology and Technology  v.45 n.3 2002
Fonte: | info:eu-repo/semantics/openAccess