Submitted to: HortScience
Publication Type: Abstract Only
Publication Acceptance Date: 4/27/1998
Publication Date: N/A
Technical Abstract: A number of pure flavonoid compounds have been isolated and identified from seedcoats of bean (Phaseolus vulgaris) with known genotypes for seedcoat color. Kaempferol-3-O- -D-glucopyranoside was found to be the major seedcoat flavonol of the 'brown' genotypes: yellow brown (P C J G b v), mineral brown (P C J G B v), mat mineral brown (PC j G B v), and buffy citrine (P C J g B v). This kaempferol glycoside was also found in a yellow bean ('prim', P C j G b v) of the manteca market class but the diglycoside kaempferol-3-O- -D-glucopyranoside-(2 1)- -D-xylopyranoside was another major flavonol found in manteca. The 'brown' genotypes also contained proanthocyanidins which are currently being characterized, but no tannins or proanthocyanidins were found in the manteca bean. Three main anthocyanins have been found in the three 'black' genotypes: mat black, 5-593 and dark brown violet. Preliminary identification of the anthocyanins indicates the presence of delphinidin, petunidin and malvidin.