title: Flavonol content, oil%, and fatty acid composition variability in seeds of Teramnus labialis and T. uncinatus accessions with nutraceutical potential.
abstract: Teramnus labialis and T. uncinatus are both underutilized legume species. Teramnus labialis is used as food in India while T. uncinatus has potential use in pasture mixes. Photoperiod-sensitive Teramnus accessions were grown in the greenhouse from 2010 to 2011 and evaluated for flavonol content, oil%, and fatty acid compositions. Significant variations for seed numbers produced, flavonol content, oil%, and fatty acid compositions were detected. Seed numbers ranged from 16 to 3,792 in both species. Teramnus accessions produced more quercetin (ranging from 0.615 to 2.228 mg/g) in their seeds than the other flavonols. However kaempferol and isorhamnetin content ranged from 0 to 0.066 and 0 to 0.086 mg/g (dry seed weight basis), respectively among all accessions. Oil% ranged from 2.65 to 5.64% and more oleic, linoleic, and linolenic acids ranging from 6.69 to 25.97, 31.82 to 41.44, and 17.7 to 32.66%, respectively, were produced among all Teramnus accessions. The seeds from all Teramnus accessions also produced the least saturated fatty acid compositions (ranging from 0.08 to 15.36%). Several significant correlations were also detected for these traits among the accessions. Quercetin showed highly significant positive correlations with kaempferol (r = 0.59, p < .0001), oil% (r = 0.58, p < .0001), and oleic acid (r = 0.31, p < .001). Quercetin also showed a significant negative correlation with linoleic acid (r = -0.49, p < .0001). These correlations are important because useful breeding procedures could be conducted on improving flavonol, oil%, and fatty acid compositions in Teramnus labialis and T. uncinatus accessions.
authors: Agricultural Research Service, Plant Genetic Resources Conservation Unit , Griffin, GA , USA.
authors: John Bradley
authors: JB
authors: Morris
authors: Brandon
authors: B
authors: Tonnis
authors: Ming Li
authors: ML
authors: Wang
mesh_terms: D019587:Dietary Supplements; D007887:Fabaceae / Q000737:chemistry*; D005227:Fatty Acids / Q000032:analysis*; D044948:Flavonols / Q000032:analysis*; D006801:Humans; D007194:India; D044949:Kaempferols / Q000032:analysis; D019787:Linoleic Acid / Q000032:analysis; D019301:Oleic Acid / Q000032:analysis; D010938:Plant Oils / Q000032:analysis*; D011794:Quercetin / Q000031:analogs & derivatives / Q000032:analysis; D012639:Seeds / Q000737:chemistry*; D013045:Species Specificity; D017962:alpha-Linolenic Acid / Q000032:analysis
chemical_list: D005227:Fatty Acids; D044948:Flavonols; D044949:Kaempferols; D010938:Plant Oils; C047368:3-methylquercetin; D017962:alpha-Linolenic Acid; D019301:Oleic Acid; C006552:kaempferol; D011794:Quercetin; D019787:Linoleic Acid
keywords: Teramnus labialis; Teramnus uncinatus; evaluation; fatty acids; flavonol; nutraceutical; oil