AI Article Synopsis
- Cowpea seeds exhibit significant morpho-genetic diversity in Africa, yet their hulls' phytochemical profiles remain under-researched.
- A study using UPLC-QTOF-MS identified 34 secondary metabolites in seed-coats from thirteen cowpea accessions, highlighting variations in phenolic compounds based on seed-coat pigmentation.
- The analysis suggests that darker-seeded cowpeas have higher concentrations of beneficial metabolites, indicating their potential for food and pharmaceutical applications.
Article Abstract
Cowpea ( L. Walp.) is an important grain legume in Africa exhibiting high morpho-genetic diversity. However, not much information exists on the phytochemical profiles of its hulls. This study explored the metabolite profiles of seed-coats from thirteen cowpea accessions of varying phenotypes using UPLC-QTOF-MS and chemometric analysis. A total of 34 secondary metabolites were identified, which comprised phenolic acids, flavonoids, anthocyanins, sphingolipids and fatty acids. Quantification of selected phenolic compounds revealed marked variations among the cowpea accessions. The chemical profiles of the test accessions were distinguished by multivariate analysis, and the results revealed a marked influence of seed-coat pigmentation on the observed differences in their metabolite profiles. Moreover, delphinidin (traces to 2257.6 µg/g), catechin glucoside (traces to 2840.6 µg/g), catechin (traces to 2089.2 µg/g) and epicatechin (26.3 to 3222.7 µg/g) contributed to the segregation amongst the studied samples. The concentrations of the discriminant metabolites were greater in the dark seeded cowpeas compared to their lighter seeded counterparts. The findings represent a useful contribution to the literature on cowpea seed coat metabolites, and also reveal their potential for use in the development of food and pharmaceutical products.
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| http://dx.doi.org/10.1080/14786419.2018.1548463 | DOI Listing |
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