Impact of phenolic compounds and related enzymes in sorghum varieties for resistance and susceptibility to biotic and abiotic stresses.
Contents of phenolic compounds and related enzymes before and after sorghum grain germination were compared between varieties either resistant or susceptible to biotic (sooty stripe, sorghum midge, leaf anthracnose, striga, and grain molds) and abiotic (lodging, drought resistance, and photoperiod sensitivity) stresses. Independent of grain germination, sorghum varieties resistant to biotic and abiotic stresses had on average higher contents of proanthocyanidins (PAs), 3-deoxyanthocyanidins (3-DAs), and flavan-4-ols than susceptible varieties. Results show that content of 3-DAs is a good marker for sorghum resistance to both biotic and abiotic stresses because it correlates with resistance to all stresses except for photoperiod sensitivity. The second good marker for stress resistance is content of PAs. Total phenolic compounds and the activities of related enzymes are not good markers for stress resistance in sorghum grains.
Dicko
Mamoudou H
MH
Laboratoire de Biochimie, UFR-SVT, CRSBAN, Université de Ouagadougou, 03 BP.7021, Ouagadougou 03, Burkina Faso. mdicko@univ-ouaga.bf
Gruppen
Harry
H
Barro
Clarisse
C
Traore
Alfred S
AS
van Berkel
Willem J H
WJ
Voragen
Alphons G J
AG
D000222:Adaptation, Physiological; D000872:Anthocyanins / Q000032:analysis*; D015415:Biomarkers; D005419:Flavonoids / Q000032:analysis*; D018525:Germination / Q000502:physiology; D010636:Phenols / Q000032:analysis*; D010777:Photochemistry; D044945:Proanthocyanidins / Q000032:analysis*; D045868:Sorghum / Q000737:chemistry* / Q000201:enzymology / Q000382:microbiology / Q000502:physiology
D000872:Anthocyanins; D015415:Biomarkers; D005419:Flavonoids; D010636:Phenols; D044945:Proanthocyanidins