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Title: Effects of fungicide treatment, N-fertilisation and harvest date on arabinoxylan, endoxylanase activity and endoxylanase inhibitor levels in wheat kernels
Authors: Dornez, Emmie ×
Gebruers, Kurt
Joye, Iris
De Ketelaere, Bart
Lenartz, Jonathan
Massaux, Carine
Bodson, Bernard
Delcour, Jan
Courtin, Christophe #
Issue Date: Mar-2008
Publisher: Academic press ltd elsevier science ltd
Series Title: Journal of cereal science vol:47 issue:2 pages:190-200
Abstract: Fungicide treatment had a significant impact on endoxylanase activity and XIP levels, but did not affect arabinoxylan (AX) and TAXI levels. The different response of TAXI and XIP type inhibitors to fungicide treatment is interesting. N-fertilisation did not affect AX levels, but significantly increased TAXI and XIP type inhibitor levels. Wheat-associated microbial endoxylanase activity levels were also affected by nitrogen supply, but levels of the endogenous enzyme did not change, except when sprouting occurred. The weather conditions before harvest had no influence on total AX (TOT-AX) and inhibitor levels, but had a large impact on both microbial and endogenous endoxylanase activity and water extractable AX (WE-AX) levels. Under most conditions, endoxylanase activity levels were related to those of alpha-amylases, liquefaction numbers (LN) and specific weights. WE-AX levels were often weakly but significantly correlated with endoxylanase activity levels, indicating that it is possible that part of the WE-AX in wheat originates from AX degradation by endoxylanases in the field. These results clearly indicate that agronomic circumstances significantly affect the levels of AX, endoxylanases and their inhibitors in wheat, and consequently could affect wheat quality. (c) 2007 Elsevier Ltd. All rights reserved.
URI: 
ISSN: 0733-5210
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Mechatronics, Biostatistics and Sensors (MeBioS)
Centre for Food and Microbial Technology
× corresponding author
# (joint) last author

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