β-Xylanase production by Aureobasidium pullulans grown on sugars agricultural residues

Aureobasidium pullulans grew well in media containing glucose, fructose, xylan or xylose but β-xylanase was only produced with xylan or xylose. Lactose and maltose were poor substrates for growth. β-Xylanase production was repressed in media containing glucose or fructose along with xylose. Agricultural residues, such as wheat bran, paddy husk and rice straw, could be used as carbon sources for growth and β-xylanase production of Aureobasidium pullulans. Tween 80 at 0.5% (v/v) increased the yield of β-xylanase by up to 20%.