Xylanase, β-Glucanase, and Other Side Enzymatic Activities Have Greater Effects on the Viscosity of Several Feedstuffs than Xylanase and β-Glucanase Used Alone or in Combination
This study was carried out to evaluate the effects of a pure xylanase, a pure β-glucanase, a mix of the two pure enzymes, and a commercial enzyme preparation (Quatrazyme HP, Nutri-Tomen Les Ulis, France) on the viscosity exhibited by water-soluble nonstarch polysaccharides of several feedstuffs (Ria...
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Veröffentlicht in: | Journal of agricultural and food chemistry 2002-08, Vol.50 (18), p.5121-5127 |
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Zusammenfassung: | This study was carried out to evaluate the effects of a pure xylanase, a pure β-glucanase, a mix of the two pure enzymes, and a commercial enzyme preparation (Quatrazyme HP, Nutri-Tomen Les Ulis, France) on the viscosity exhibited by water-soluble nonstarch polysaccharides of several feedstuffs (Rialto wheat, Sidéral wheat, Isengrain wheat, triticale, rye, barley, oats, corn, wheat bran, rice bran, wheat screenings, soybean meal, rapeseed meal, sunflower meal, and peas). The viscosity depended on the feedstuffs and varieties of the same feedstuff. There was a correlation (R 2 = 0.86) between viscosity of cereals and their arabinoxylan and β-glucan contents. The correlation was greater (R 2 = 0.99) when the type of cereal was taken into account. The addition of pure xylanase significantly decreased the viscosity of all feedstuffs except sunflower meal (P ≤ 0.05). However, pure β-glucanase was unable significantly to decrease the viscosity of Isengrain wheat, corn, rice bran, wheat screenings, soybean meal, and sunflower meal. There was a greater decrease in viscosity with the combination of xylanase and β-glucanase than with addition of xylanase or β-glucanase alone. This synergistic action of xylanase and β-glucanase was observed only in Rialto wheat, Sidéral wheat, triticale, rye, barley, oats, and peas. Finally, the commercial enzyme preparation produced a greater reduction (P ≤ 0.05) in viscosity for all feedstuffs compared to xylanase or β-glucanase used alone or in combination. The greater effectiveness of the commercial enzyme preparation was due to the presence of side enzymatic activities (arabinofuranosidase, xylosidase, glucosidase, galactosidase, cellulase, and polygalacturonase). Keywords: Xylanase; β-glucanase; side enzymatic activities; viscosity; feedstuffs |
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ISSN: | 0021-8561 1520-5118 |
DOI: | 10.1021/jf011507b |