Document Detail


UPLC-TQD MS/MS Profiling of Anthocyanins and Flavonols in Cowpea (Vigna unguiculata): Effect of Seed Coat Color.
MedLine Citation:
PMID:  22429113     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The structure of flavonoids in food plants affects bioactivity and important nutritional attributes, like micronutrient bioavailability. This study investigated flavonol and anthocyanin composition of cowpea (Vigna unguiculata) of varying genotypes. Black, red, green, white, light brown and golden brown cowpea phenotypes were analyzed for anthocyanins and flavonols using UPLC-triple quadrupole MS/MS. Eight anthocyanins and 23 flavonols (15 newly identified in cowpea) were characterized. Mono-, di-, and tri(acyl)glycosides of quercetin were predominant in most phenotypes; myricetin and kaempferol glycosides were present only in specific phenotypes. The red phenotypes had the highest flavonol content (880 - 1,060 g/g), whereas green and white phenotypes had the lowest (270 - 350 g/g). Only black (1,676 - 2,094 g/g) and green (875 g/g) phenotypes had anthocyanins, predominantly delphinidin and cyanidin 3-O-glucosides. Cowpea phenotype influenced the type and amount of flavonoids accumulated in the seed; this may have implications in selecting varieties for nutrition and health applications.
Authors:
Leonnard O Ojwang; Linda Dykes; Joseph Mobutu Awika
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-3-19
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  -     ISSN:  1520-5118     ISO Abbreviation:  -     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-3-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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