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  • Title: Flavonol content, oil%, and fatty acid composition variability in seeds of Teramnus labialis and T. uncinatus accessions with nutraceutical potential.
    Author: Morris JB, Tonnis B, Wang ML.
    Journal: J Diet Suppl; 2014 Sep; 11(3):294-303. PubMed ID: 25054688.
    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.
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