Composição de exopolissacarídeos produzidos por estirpes de rizóbios cultivados em diferentes fontes de carbono
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Data
2007-10-01
Autores
Castellane, Tereza Cristina Luque [UNESP]
Lemos, Eliana Gertrudes de Macedo [UNESP]
Título da Revista
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Editor
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
Resumo
O objetivo deste trabalho foi avaliar o efeito de diferentes fontes de carbono na composição dos exopolissacarídeos produzidos por Rhizobium tropici SEMIA 4077 e SEMIA 4080, e o efeito da inoculação dessas estirpes na nodulação em feijoeiro. As fontes de carbono utilizadas interferiram nas concentrações de galactose e glicose dos exopolissacarídeos, que foram maior na SEMIA 4080 em meio com sacarose. Embora a SEMIA 4080 tenha liberado grande quantidade de exopolissacarídeos na cultura, não houve diferença entre as estirpes quanto ao número de nódulos do feijoeiro, independentemente da fonte de carbono utilizada no preparo do inóculo. No parâmetro matéria seca de nódulos, houve diferença entre as estirpes, independentemente da fonte de carbono utilizada no preparo do inóculo.
The objective of this work was to evaluate the effect of different carbon souces on the exopolysaccharides composition produced by Rhizobium tropici SEMIA 4077 and SEMIA 4080, and the effect of these strains inoculation on the nodulation in common bean. The carbon sources used interfered on the concentrations of the galactose and glucose of exopolysaccharides, being higher in SEMIA 4080 strain when cultivated in sucrose medium. Even though SEMIA 4080 strain produced a large quantity of exopolysaccharides in culture, there was no difference between strains regarding the number of nodules, independently of the carbon source used for inoculum preparation. However, in the parameter dry weight of nodules there was significant difference between the strains, independently of the carbon sources used for inoculum preparation.
The objective of this work was to evaluate the effect of different carbon souces on the exopolysaccharides composition produced by Rhizobium tropici SEMIA 4077 and SEMIA 4080, and the effect of these strains inoculation on the nodulation in common bean. The carbon sources used interfered on the concentrations of the galactose and glucose of exopolysaccharides, being higher in SEMIA 4080 strain when cultivated in sucrose medium. Even though SEMIA 4080 strain produced a large quantity of exopolysaccharides in culture, there was no difference between strains regarding the number of nodules, independently of the carbon source used for inoculum preparation. However, in the parameter dry weight of nodules there was significant difference between the strains, independently of the carbon sources used for inoculum preparation.
Descrição
Palavras-chave
Phaseolus vulgaris, Rhizobium tropici, extracellular polysaccharide, Nodulation, Phaseolus vulgaris, Rhizobium tropici, polissacarídeo extracelular, Nodulação
Como citar
Pesquisa Agropecuária Brasileira. Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Informação TecnológicaPesquisa Agropecuária Brasileira, v. 42, n. 10, p. 1503-1506, 2007.