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.
Quality of Plant Products, Department of Crop Sciences, Faculty of Agricultural Sciences, Georg-August University Gottingen, 37075 Gottingen, Germany.
Kai
K
Eggert
Jürgen
J
Hollmann
Beate
B
Hiller
Hans-Peter
HP
Kruse
Hashadrai M
HM
Rawel
Elke
E
Pawelzik
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