Endoglucanase and Xylanase Production by Bacillus sp. AR03 in Co-Culture

HERO JS; PISA JH; PEROTTI NI; ROMERO CM; MARTÍNEZ MA; HERO JS; PISA JH; PEROTTI NI; ROMERO CM; MARTÍNEZ MA

PREPARATIVE BIOCHEMISTRY AND BIOTECHNOLOGY

TAYLOR & FRANCIS INC

Lugar: Londres; Año: 2017 vol. 47 p. 589 - 596

1082-6068

The behaviour of three isolates retrieved from different cellulolytic consortia, Bacillus sp. AR03, Paenibacillus sp. AR247 and Achromobacter sp. AR476-2, were examined individually and as co-cultures in order evaluate their ability to produce extracellular cellulases and xylanases. Utilizing a peptone-based medium supplemented with carboxymethyl cellulose (CMC), an increase estimated of 1.30 and 1.50 times was obtained by the co-culture containing the strains AR03 and AR247, with respect to enzyme titles registered by their individual cultivation. On the contrary, the extracellular enzymatic production decreased during the co-cultivation of strain AR03 with the non-cellulolytic Achromobacter sp. AR476-2. The synergistic behaviour observed through the combined cultivation of the strains AR03 and AR247 might be a consequence of the consumption by Paenibacillus sp. AR247 of the products of the CMC hydrolysis (i.e., cellobiose and/or cello- oligosaccharides), which were mostly generated by the cellulase producer Bacillus sp. AR03. The effect observed could be driven by the requirement to fulfil the nutritional supply from both strains on the substrate evaluated. These results would contribute to a better description of the degradation of the cellulose fraction of the plant cell walls in nature, expected to an efficient utilization of renewable sources.