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Research paper thumbnail of Insight in variability of endoxylanases and endoxylanase inhibitors in wheat

status: …, 2005

... Authors: Dornez, Emmie Joye, Iris Gebruers, Kurt Lenartz, J. Massaux, C. Bodson, B. Courtin, ... more ... Authors: Dornez, Emmie Joye, Iris Gebruers, Kurt Lenartz, J. Massaux, C. Bodson, B. Courtin, Christophe Delcour, Jan. Issue Date: Sep-2005. Conference: Annual Meeting, American Association of Cereal Chemists (AACC) location:Orlando, USA date:11 - 14 September. ...

Research paper thumbnail of Effect of the sowing date on physicochemical and fonctional properties of native starches extracted from European soft wheat (Triticum aestivum L.)

Research paper thumbnail of Influence de la protection fongicide, de la variete et de la date de semis sur les caracteristiques et les proprietes de l'amidon de ble

Research paper thumbnail of Influence de la variété de blé tendre sur les caractéristiques physico-chimiques et les propriétés techno-fonctionnelles de l'amidon

Industries Des Cereales, 2007

Research paper thumbnail of Influence of residual alpha-amylase activity on the pasting properties of extracted wheat starch

Research paper thumbnail of Caractères et propriétés de l'amidon de blé

Les Nouvelles De L Agriculture, 2007

Research paper thumbnail of Influence de la protection fongicide, de la variété et de la date de semis sur les caractéristiques et propriétés de l'amidon de blé

Research paper thumbnail of Industries des Céréales

Research paper thumbnail of Effects of fungicide treatment, N-fertilisation and harvest date on arabinoxylan, endoxylanase activity and endoxylanase inhibitor levels in wheat kernels

Journal of Cereal Science, 2008

... In other words the considered harvest years and genotypes are treated as a sample from all po... more ... In other words the considered harvest years and genotypes are treated as a sample from all possible years and genotypes, respectively. The choice for random rather than fixed factors was based on the review by Smith et al. ...

Research paper thumbnail of Rapid visco analyser: influence des caractéristiques intrinsèques de l'amidon et des activités alpha-amylasiques sur les propriétés de gélification des moutures de blés tendres

a m y L a s i q u e s s u r L e s p r o p r i é t é s d e g é L i f i c a t i o n d e s m o u t u... more a m y L a s i q u e s s u r L e s p r o p r i é t é s d e g é L i f i c a t i o n d e s m o u t u r e s d e b L é t e n d r e * vutsrqponmlkjihgfedcbaZYXWVUTSR 'Poster présenté aux 56hgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA M Journées Techniques des Industries Céréalières -Oct. 2005

Research paper thumbnail of Insight into variability of apparent endoxylanase and endoxylanase inhibitor levels in wheat kernels

Journal of the Science of Food and Agriculture, 2006

... in wheat processing was clearly demonstrated for breadmaking,17 gluten–starch separation18 an... more ... in wheat processing was clearly demonstrated for breadmaking,17 gluten–starch separation18 and refrigerated dough systems.19, 20. ... Kurt Gebruers is a postdoctoral fellow of the Fonds voor Wetenschappelijk Onderzoek-Vlaanderen (FWO-Vlaanderen, Brussels, Belgium). ...

Research paper thumbnail of Variations in physicochemical and functional properties of starches extracted from European soft wheat (Triticum aestivum L.): The importance to preserve the varietal identity

Carbohydrate Polymers, 2008

... starch and whole flour) were performed in water and with addition of 2 mM AgNO 3 to nullify α... more ... starch and whole flour) were performed in water and with addition of 2 mM AgNO 3 to nullify α-amylase effects and facilitate comparisons between cultivars ([Abdel-Aal et al., 2002], [Bason et al., 1993], [Batey et al., 1997], [Bhattacharya and Corke, 1996] and [Crosbie and Lambe ...

Research paper thumbnail of Effects of genotype, harvest year and genotype-by-harvest year interactions on arabinoxylan, endoxylanase activity and endoxylanase inhibitor levels in wheat kernels

Journal of Cereal Science, 2008

ABSTRACT The effects of genotype, harvest year and their interaction on the levels of arabinoxyla... more ABSTRACT The effects of genotype, harvest year and their interaction on the levels of arabinoxylans (AX), endoxylanases and endoxylanase inhibitors in wheat were studied using 14 varieties grown in three successive growing periods with diverse climatological conditions. Relations with more commonly evaluated wheat characteristics such as yield, thousand kernel weight, specific weight, protein level, Hagberg falling number (HFN) and α-amylase activity level were examined. Water extractable arabinoxylan (WE-AX) levels in wheat varied much more than total arabinoxylan (TOT-AX) levels. This variability was mainly genetically determined, but harvest year also had an important effect. Total endoxylanase activity levels varied more than a factor of 20 between the different wheat samples. Endogenous endoxylanases typically accounted for only 10–15% of this activity, while wheat-associated microbial endoxylanases accounted for the remaining 85–90%. However, when preharvest sprouting occurred, the contribution of endogenous endoxylanases could sometimes amount to over 40% of this total activity. Endogenous endoxylanase activity levels were mainly determined by the interaction of genotype and harvest year, while wheat-associated microbial endoxylanase activity levels were predominantly determined by genotype alone. Endogenous and microbial endoxylanase activity levels were strongly correlated, suggesting that wheat varieties which are susceptible to preharvest sprouting are often also susceptible to microbial contamination. The TAXI and XIP-type endoxylanase inhibitor levels varied by a factor of 8 and 1.8, respectively. They were mainly determined by genotype and were rather similar in the different growing periods.

Research paper thumbnail of Insight in variability of endoxylanases and endoxylanase inhibitors in wheat

status: …, 2005

... Authors: Dornez, Emmie Joye, Iris Gebruers, Kurt Lenartz, J. Massaux, C. Bodson, B. Courtin, ... more ... Authors: Dornez, Emmie Joye, Iris Gebruers, Kurt Lenartz, J. Massaux, C. Bodson, B. Courtin, Christophe Delcour, Jan. Issue Date: Sep-2005. Conference: Annual Meeting, American Association of Cereal Chemists (AACC) location:Orlando, USA date:11 - 14 September. ...

Research paper thumbnail of Effect of the sowing date on physicochemical and fonctional properties of native starches extracted from European soft wheat (Triticum aestivum L.)

Research paper thumbnail of Influence de la protection fongicide, de la variete et de la date de semis sur les caracteristiques et les proprietes de l'amidon de ble

Research paper thumbnail of Influence de la variété de blé tendre sur les caractéristiques physico-chimiques et les propriétés techno-fonctionnelles de l'amidon

Industries Des Cereales, 2007

Research paper thumbnail of Influence of residual alpha-amylase activity on the pasting properties of extracted wheat starch

Research paper thumbnail of Caractères et propriétés de l'amidon de blé

Les Nouvelles De L Agriculture, 2007

Research paper thumbnail of Influence de la protection fongicide, de la variété et de la date de semis sur les caractéristiques et propriétés de l'amidon de blé

Research paper thumbnail of Industries des Céréales

Research paper thumbnail of Effects of fungicide treatment, N-fertilisation and harvest date on arabinoxylan, endoxylanase activity and endoxylanase inhibitor levels in wheat kernels

Journal of Cereal Science, 2008

... In other words the considered harvest years and genotypes are treated as a sample from all po... more ... In other words the considered harvest years and genotypes are treated as a sample from all possible years and genotypes, respectively. The choice for random rather than fixed factors was based on the review by Smith et al. ...

Research paper thumbnail of Rapid visco analyser: influence des caractéristiques intrinsèques de l'amidon et des activités alpha-amylasiques sur les propriétés de gélification des moutures de blés tendres

a m y L a s i q u e s s u r L e s p r o p r i é t é s d e g é L i f i c a t i o n d e s m o u t u... more a m y L a s i q u e s s u r L e s p r o p r i é t é s d e g é L i f i c a t i o n d e s m o u t u r e s d e b L é t e n d r e * vutsrqponmlkjihgfedcbaZYXWVUTSR 'Poster présenté aux 56hgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA M Journées Techniques des Industries Céréalières -Oct. 2005

Research paper thumbnail of Insight into variability of apparent endoxylanase and endoxylanase inhibitor levels in wheat kernels

Journal of the Science of Food and Agriculture, 2006

... in wheat processing was clearly demonstrated for breadmaking,17 gluten–starch separation18 an... more ... in wheat processing was clearly demonstrated for breadmaking,17 gluten–starch separation18 and refrigerated dough systems.19, 20. ... Kurt Gebruers is a postdoctoral fellow of the Fonds voor Wetenschappelijk Onderzoek-Vlaanderen (FWO-Vlaanderen, Brussels, Belgium). ...

Research paper thumbnail of Variations in physicochemical and functional properties of starches extracted from European soft wheat (Triticum aestivum L.): The importance to preserve the varietal identity

Carbohydrate Polymers, 2008

... starch and whole flour) were performed in water and with addition of 2 mM AgNO 3 to nullify α... more ... starch and whole flour) were performed in water and with addition of 2 mM AgNO 3 to nullify α-amylase effects and facilitate comparisons between cultivars ([Abdel-Aal et al., 2002], [Bason et al., 1993], [Batey et al., 1997], [Bhattacharya and Corke, 1996] and [Crosbie and Lambe ...

Research paper thumbnail of Effects of genotype, harvest year and genotype-by-harvest year interactions on arabinoxylan, endoxylanase activity and endoxylanase inhibitor levels in wheat kernels

Journal of Cereal Science, 2008

ABSTRACT The effects of genotype, harvest year and their interaction on the levels of arabinoxyla... more ABSTRACT The effects of genotype, harvest year and their interaction on the levels of arabinoxylans (AX), endoxylanases and endoxylanase inhibitors in wheat were studied using 14 varieties grown in three successive growing periods with diverse climatological conditions. Relations with more commonly evaluated wheat characteristics such as yield, thousand kernel weight, specific weight, protein level, Hagberg falling number (HFN) and α-amylase activity level were examined. Water extractable arabinoxylan (WE-AX) levels in wheat varied much more than total arabinoxylan (TOT-AX) levels. This variability was mainly genetically determined, but harvest year also had an important effect. Total endoxylanase activity levels varied more than a factor of 20 between the different wheat samples. Endogenous endoxylanases typically accounted for only 10–15% of this activity, while wheat-associated microbial endoxylanases accounted for the remaining 85–90%. However, when preharvest sprouting occurred, the contribution of endogenous endoxylanases could sometimes amount to over 40% of this total activity. Endogenous endoxylanase activity levels were mainly determined by the interaction of genotype and harvest year, while wheat-associated microbial endoxylanase activity levels were predominantly determined by genotype alone. Endogenous and microbial endoxylanase activity levels were strongly correlated, suggesting that wheat varieties which are susceptible to preharvest sprouting are often also susceptible to microbial contamination. The TAXI and XIP-type endoxylanase inhibitor levels varied by a factor of 8 and 1.8, respectively. They were mainly determined by genotype and were rather similar in the different growing periods.