Hydrolysis of extracted and fibre-bound xylan with Aureobasidium pullulans enzymes

Xylanase supplementation to a wheat-based diet alleviated the intestinal mucosal barrier impairment of broiler chickens challenged byClostridium perfringens

“…Bedford & Apajalahti (2001) demonstrated in birds fed wheat-based diets that addition of a xylanase-based enzyme preparation resulted in a 60% reduction in bacterial numbers, and research by Hü bener et al (2002) supported this finding. Moreover, in the process of depolymerizing arabinoxylans, the major non-starch polysaccharide fraction in wheat, xylanases may produce xylose and xylo-oligomers (Christov et al, 1997;Valenzuela et al, 2010). These enzyme hydrolysis products are similar to prebiotics and may facilitate the proliferation of specific beneficial bacteria such as Bifidobacterium and Lactobacillus (Monsan & Paul, 1995;Bedford, 2000) to indirectly suppress proliferation of certain pathogenic species including C. perfringens (Gibson & Roberfroid, 1995), but no direct evidence about this was available.…”

Hemicellulose bioconversion

“…Christov et al [14] showed that crude enzyme preparation from Aureobasidium pullulans was only partially effective in the removal of xylan from dissolving pulp. Saha [108,110] isolated three fungal cultures (Fusarium proliferatum NRRL 26517, Fusarium verticillioides NRRL Y-26518, and Mucor circinelloides NRRL Y-26519) that had the capability to utilize corn fiber xylan as growth substrate after screening 132 soil samples surrounding decaying corn and wood.…”

Switchgrass for bioethanol and other value-added applications: A review

“…Other microorganisms that have been reported as sources for hemicellulose-degrading enzymes are Aureobasidium pullulans (Christov et al, 1997) and several Fusarium species (Saha, 2001(Saha, , 2002. As in cellulase systems, xylan-degrading systems also exhibit synergism (Bachmann and McCarthy, 1991).…”