Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 57, Issue 7, Pages 2719-2725Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf803633f
Keywords
Allelopathy; buckwheat; catechin; developmental stage; quercetin 3-O-beta-D-glucoside; myricetin; quercetin; weed
Funding
- Grant Agency, Czech Republic [521/03/D076]
- Ministry of Education of the Czech Republic [MSM 6007665806]
- ISBE AS CR [AV0Z60870520]
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Buckwheat is well-known as a crop rich in flavonoids, however, attention has usually only been paid to the main flavonoid rutin as an important natural antioxidant or as a possible allelopathic compound. Therefore, some of the other constituents found within individual plant parts of buckwheat (isoquercitrin, quercetin, catechin, and myricetin), as well as changes of their level during the growing season, were determined by HPLC analysis. The effects of these compounds on plant growth were proved on seven plant species. In buckwheat, isoquercitrin represented the largest component of the selected compounds. The strongest inhibitive effects on the growth of those selected plants were produced by catechin. Quercetin and isoquercitrin had weak inhibitive effects. Myricetin did not show any influence on plant growth. Hence we suppose that myricetin, isoquercetin and quercetin do not have important function in allelopathy of buckwheat. Buckwheat as row material for functional foods could be a significant source of another antioxidant, isoquercitrin.
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