Impact of Phenolic Compounds and Related Enzymes in Sorghum Varieties for Resistance and Susceptibility to Biotic and Abiotic Stresses |
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| Authors: | Email author" target="_blank">Mamoudou?H?DickoEmail author Harry?Gruppen Clarisse?Barro Alfred?S?Traore Willem?J?H?van?Berkel Alphons?G?J?Voragen |
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| Affiliation: | (1) Laboratoire de Biochimie, UFR-SVT, CRSBAN, Université de Ouagadougou, 03 BP. 7021 Ouagadougou 03, Burkina Faso;(2) Laboratory of Food Chemistry, Department of Agrotechnology and Food Sciences, Wageningen University, PO Box 8129, 6700 EV Wageningen, The Netherlands;(3) Laboratory of Biochemistry, Department of Agrotechnology and Food Sciences, Wageningen University, PO Box 8128, 6700 ET Wageningen, The Netherlands;(4) Centre National de Recherche Scientifique et Technologique (CNRST), INERA/SARIA, BP. 10, Koudougou, Burkina Faso |
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| Abstract: | 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. |
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| Keywords: | Sorghum proanthocyanidins 3-deoxyanthocyanidins phenylalanine ammonia lyase peroxidase polyphenol oxidase stress biotic abiotic |
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