Data/hora: 07/06/2024 02:43:33

Provedor de dados: | 58
País: | Brazil
Título: | Rhizobia amylase production using various starchy substances as carbon substrates
Autores: | Oliveira,Arlem Nascimento de; Oliveira,Luiz Antonio de; Andrade,Jerusa Sousa; Chagas Júnior,Aloisio Freitas.
Data: | 2007-06-01
Ano: | 2007
Palavras-chave: | Rhizobium; Bradyrhizobium; Cowpea; Soybean; Peach palm; Central Amazonia.
Resumo: | Six isolates of indigenous rhizobia of Central Amazonia were screened for the production of amylases in liquid media using various starchy substances as carbon sources. All rhizobia strains could produce more extracellular protein, biomass and amylases with the different kinds of carbon substrates. Among the carbon sources tested maltose was the best substrate for protein and amylase production. In general, peach palm flour and corn starch (maizena®) were also considered to be good carbon sources for rhizobia amylases. On the other hand, the biomass production by the rhizobia isolates was higher in the presence of oat flour. INPA strain R-926 was a good amylase producer in maltose (1.94 U) and corn starch (0.53 U) media. INPA strain R-991 was also a good amylase producer in maltose (1.66 U) and corn starch (1.59 U) yielding significant extracellular amylase. Correlation analysis showed significant and positive relationships between rhizobia amylases and final pH (r = 0.49, P &lt; 0.05), extracellular protein (r = 0.47, P &lt; 0.47) and biomass production (r = 0.69, P &lt; 0.01) in the maltose medium. The results obtained in this study revealed several Central Amazonian rhizobia strains as promising sources of amylase for biotechnological applications, especially in starch industry.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200005
Editor: | Sociedade Brasileira de Microbiologia
Relação: | 10.1590/S1517-83822007000200005
Formato: | text/html
Fonte: | Brazilian Journal of Microbiology  v.38 n.2 2007
Fonte: | info:eu-repo/semantics/openAccess