Evaluation of the biotechnological potential of Rhizobium tropici strains for exopolysaccharide production

Autor(es)

Luque Castellane, Tereza Cristina ^[1] ; Franco Lemos, Manoel Victor ^[2] ; de Macedo Lemos, Eliana Gertrudes ^[1]

Afiliação do(s) autor(es)

^[1] UNESP Univ Estadual Paulista, Fac Ciencias Agr & Vet, Dept Tecnol, BR-14884900 Jaboticabal, SP - Brazil

^[2] UNESP Univ Estadual Paulista, Fac Ciencias Agr & Vet, Dept Biol Aplicada & Agr, BR-14884900 Jaboticabal, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Carbohydrate Polymers; v. 111, p. 191-197, OCT 13 2014.
• Citações Web of Science: 24

Resumo

Rhizobium tropici, a member of the Rhizobiaceae family, has the ability to synthesize and secrete extracellular polysaccharides (EPS). Rhizobial EPS have attracted much attention from the scientific and industrial communities. Rhizobial isolates and R. tropici mutants that produced higher levels of EPS than the wildtype strain SEMIA4080 were used in the present study. The results suggested a heteropolymer structure for these EPS composed by glucose and galactose as prevailing monomer unit. All EPS samples exhibited a typical non-Newtonian and pseudoplastic fluid flow, and the aqueous solutions apparent viscosities increased in a concentration-dependent manner. These results serve as a foundation for further studies aimed at enhancing interest in the application of the MUTZC3, JAB1 and JAB6 strains with high EPS production and viscosity can be exploited for the large-scale commercial production of Rhizobial polysaccharides. (C) 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/). (AU)

• Processo FAPESP: 07/57586-6 - Construção de mutantes nos genes exo da síntese do exopolissacarídeos e do gene phbC da síntese de PHB em Rhizobium tropici SEMIA 4080
• Beneficiário: Tereza Cristina Luque Castellane
• Modalidade de apoio: Bolsas no Brasil - Doutorado