Glycolytic activities in size-fractionated water samples: emphasis on rhamnosidase, arabinosidase and fucosidase activities

Autor(es)

Colombo-Corbi, Vanessa ^[1] ; Dellamano-Oliveira, Maria Jose ^[1] ; Henriques Vieira, Armando Augusto ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Bot, BR-13565 90 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Archives of Biology and Technology; v. 54, n. 3, p. 523-526, MAY-JUN 2011.
• Citações Web of Science: 0

Resumo

Glycolytic activities of eight enzymes in size-fractionated water samples from a eutrophic tropical reservoir are presented in this study, including enzymes assayed for the first time in a freshwater environment. Among these enzymes, rhamnosidase, arabinosidase and fucosidase presented high activity in the free-living fraction, while glucosidase, mannosidase and galactosidase exhibited high activity in the attached fraction. The low activity registered for rhamnosidase, arabinosidase and fucosidase in the attached fraction seemed contribute to the integrity of the aggregate and based on this fact, a protective role for these structures was proposed. The presented enzyme profiles and the differences in the relative activities probably reflected the organic matter composition as well as the metabolic requirements of the bacterial community, suggesting that bacteria attached to particulate matter had phenotypic traits distinct from those of free-living bacteria. (AU)

• Processo FAPESP: 02/04117-5 - Relações qualitativas e quantitativas das glicosidases com os polissacarídeos extracelulares de origem algal no reservado de Barra Bonita
• Beneficiário: Vanessa Colombo Corbi
• Modalidade de apoio: Bolsas no Brasil - Doutorado
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• Beneficiário: Maria José Dellamano Oliveira
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 07/58818-8 - Degradação dos polissacarídeos produzidos por Microcystis aeruginosa, com ênfase nos componentes do complexo da parede celular e identificação de populações bacterianas especializadas no processo
• Beneficiário: Vanessa Colombo Corbi
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado