Data/hora: 03/06/2024 09:41:36

Provedor de dados: | 86
País: | Brazil
Título: | Residual effects of successive exposure of soybean Bradyrhizobium strains to aluminium on solid defined medium
Autores: | Campo,Rubens José; Wood,Martin.
Data: | 2001-11-01
Ano: | 2001
Palavras-chave: | Nitrogen fixation; Antibiotics; Resistance to chemicals; Genetic variation.
Resumo: | The aim of these studies was to investigate whether residual toxic effects of exposing soybean root nodule bacteria to Al in a solid defined media (SDM) alter tolerance to Al, survival, sensitivity to antibiotics, N2 fixation effectiveness and genetic diversity of Bradyrhizobium strains. After being exposed four times to Al, strains showed variation in Al tolerance but there was no evidence of change in their original Al tolerance, sensitivity to the antibiotics or genetic diversity. Exposure of Bradyrhizobium strains to SDM plus Al did not alter biological N2 fixation effectiveness of five strains. Strain SEMIA 587 showed a reduction in its N2 fixation effectiveness but it seems that it was just a superficial toxic effect because one single passage through the plant eliminated this effect. Residual Al did not cause increases in Al tolerance and reductions in the survival and N2 fixation effectiveness of Bradyrhizobium strains USDA 143, SEMIA 586, SEMIA 5019, SEMIA 5039 and SEMIA 5073. It also did not alter the resistance to antibiotics of strains USDA 143, SEMIA 5039 and SEMIA 5073, and the genetic diversity of the strains SEMIA 587 and SEMIA 5019.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001001100011

Editor:

Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira

Relação: | 10.1590/S0100-204X2001001100011
Formato: | text/html
Fonte: | Pesquisa Agropecuária Brasileira  v.36 n.11 2001
Fonte: | info:eu-repo/semantics/openAccess