Effects of fusarium infection on the phenolics in emmer and naked barley.
Inoculated or non-inoculated naked barley and emmer cultivars were investigated with regard to their influence on phenolic acid profiles and their arabinoxylan content. Two groups of phenolic compounds were differentiated-methanol-soluble and hydrolyzable covalent-bound phenolic compounds. Chromatographic methods were applied for their analysis. The results showed ferulic acid as the predominant phenol in both total and covalent-bound fractions. The inoculation significantly reduced the ferulic acid content within a range of 5.6-6.6% in the two cereals and all their cultivars. Naked barley cultivars additionally contained the flavonoid catechin in the soluble fraction. The innoculation led here to a significant increase in the catechin content of about 4.5%. These results document an induction of the synthesis of catechin in naked barley after artificial Fusarium infection, whereas the ferulic acid content declined.
Eggert
Kai
K
Quality of Plant Products, Department of Crop Sciences, Faculty of Agricultural Sciences, Georg-August University Gottingen, 37075 Gottingen, Germany.
Hollmann
Jürgen
J
Hiller
Beate
B
Kruse
Hans-Peter
HP
Rawel
Hashadrai M
HM
Pawelzik
Elke
E
D002851:Chromatography, High Pressure Liquid; D005670:Fusarium / Q000472:pathogenicity*; D001467:Hordeum / Q000378:metabolism* / Q000382:microbiology; D006868:Hydrolysis; D009181:Mycoses / Q000378:metabolism* / Q000382:microbiology; D010636:Phenols / Q000378:metabolism*; D053719:Tandem Mass Spectrometry
D010636:Phenols