Applied Microbiology and Biotechnology

, Volume 90, Issue 2, pp 509–515

Improvement of the quality of wheat bread by addition of glycoside hydrolase family 10 xylanases

Biotechnologically Relevant Enzymes and Proteins

DOI: 10.1007/s00253-011-3088-7

Cite this article as:
Zheng, H., Guo, B., Chen, XL. et al. Appl Microbiol Biotechnol (2011) 90: 509. doi:10.1007/s00253-011-3088-7

Abstract

Although many xylanases are widely used in the baking industry, only one glycoside hydrolase family 10 (GH 10) xylanase has previously been reported to be effective in baking. In this study, we compared the effectiveness of two GH 10 xylanases, psychrophilic XynA from Glaciecola mesophila and mesophilic EX1 from Trichoderma pseudokoningii, in bread making. The optimal dosages needed to improve wheat flour dough and bread quality were 270-U/kg flour for EX1 and 0.9-U/kg flour for XynA. At their optimal dosage, both XynA and EX1 had significant dough-softening ability, resulting in a 50% reduction in Brabender units. XynA was more effective than EX1 in reducing the time to reach maximum consistency. XynA and EX1 showed similar effects in improving the bread volume (~30% increase). EX1 was more effective in reducing the initial crumb firmness. Although both enzymes exhibited similar anti-staling effects on the bread, based on a decrease in the bread firmness, XynA had a greater effect on reducing the firming rate, and EX1 showed an enhanced reduction in the initial firmness. These results show that these two GH 10 xylanases have unique advantages in improving dough and bread quality and indicate their potential in bread making.

Keywords

Bread quality Farinograph characteristics Glaciecola mesophila KMM 241 Xylanase Trichoderma pseudokoningii K9301 

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.College of Life ScienceShandong Normal UniversityJinanChina
  2. 2.State key Lab of Microbial TechnologyShandong UniversityJinanChina

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