Effect of nitrogen source on xylanase production was also
studied by replacing yeast extract containing CM with the previously
optimized modified media (MM) containing urea and
ammonium chloride (Kaushik and Malik, 2011). Fig. 2a shows the
crude xylanase activity obtained with different substrates when
nitrogenwas provided byMM in place of CM. Comparable xylanase
activities were obtained with urea and ammonium chloride as nitrogen
source with maximum amount of production on wheat bran
(130.3 U/g) followed by corn cob (114.0 U/g), sugarcane bagasse
(102.5 U/g) and wheat straw (57.5 U/g). Lower cellulase activity was
reported with each of the substrate in presence ofMMas compared
to yeast extract