Data/hora: 05/06/2024 12:22:32

Provedor de dados: | Brazilian Journal of Microbiology
País: | Brazil
Título: | Cellulase and xylanase activity during the decomposition of three aquatic macrophytes in a tropical oxbow lagoon
Autores: | Sciessere,L; Cunha-Santino,M. B; Bianchini Jr,I.
Data: | 2011-09-01
Ano: | 2011
Palavras-chave: | Enzymes; Litterbags; Mass decay; Particulate organic matter.
Resumo: | Due to the connection between enzymatic activity and degradation of different fractions of organic matter, enzyme assays can be used to estimate degradation rates of particulate and dissolved organic carbon in freshwater systems. The aim of this study was to quantify and model the enzymatic degradation involving the decomposition of macrophytes, describing temporal activity of cellulases (EC 3.2.1.4 and EC 3.2.1.91) and xylanase (EC 3.2.1.8) during in situ decomposition of three aquatic macrophytes (Salvinia sp., Eichhornia azurea and Cyperus giganteus) on the surface and water-sediment interface (w-s interface) of an oxbow lagoon (Óleo lagoon) within a natural Brazilian Savanna Reserve. Overall, the enzymatic degradation of aquatic macrophytes in Óleo lagoon occurred during the whole year and was initiated together with leaching. Xylanase production was ca. 5 times higher than cellulase values due to easy access to this compound by cellulolytic microorganisms. Enzymatic production and detritus mass decay were similar on the surface and w-s interface. Salvinia sp. was the most recalcitrant detritus, with low mass decay and enzymatic activity. E. azurea and C. giganteus decomposition rates and enzymatic production were high and similar. Due to the physicochemical homogeneity observed in the Óleo lagoon, the differences between the decay rates of each species are mostly related with detritus chemical quality.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000300009
Editor: | Sociedade Brasileira de Microbiologia
Relação: | 10.1590/S1517-83822011000300009
Formato: | text/html
Fonte: | Brazilian Journal of Microbiology  v.42 n.3 2011
Fonte: | info:eu-repo/semantics/openAccess