Abstract
The leaves, stems, roots and seeds of seven varieties of Vigna unguiculata (L.) Walp var. 'Oloka', var. Ifebrown, var. 'Kafanji', var. 'Sokoto guzo', var. Crowder pea, var. Potiskum and var. Iron beans consumed in Awka Anambra State were examined for flavonoid compositions using gravimetric method. The similar samples of each of the leaves, stems, roots and seeds were subjected to phytochemical analyses of qualitative and quantitative determination. The qualitative analyses revealed that the leaves, stems, roots and seeds of the plant under study contain flavonoid. For quantitative analyses, all the parts of the Vigna unguiculata varieties examined contain flavonoids but in various percentages. Oloka variety contains the highest flavonoids in the parts examined. On comparison with other varieties, it was discovered that var. Oloka contains the highest flavonoid in the stem, roots and seed having the following mean value (1.48, 1.42 and 0.81) respectively while Sokoto guzo contains the highest flavonoid in the leaves with the mean value of 1.67. This finding indicates that Vigna unguiculata is a good source of flavonoid and therefore can be useful in the diet as food and in ethnomedicine for the manufacture of drugs.
Highlights
Vigna unguiculata is an annual legume which belongs to the genus Vigna that consist of more than 200 species
In many parts of West Africa including Nigeria, cowpea seeds are consumed as boiled seeds, seeds can be converted into flour or paste and used for the preparation of indigenous food such as akara and moin moin [9]
It becomes necessary to investigate the composition of flavonoid in different parts of seven varieties of Vigna unguiculata consumed in Awka Anambra State Nigeria namely var
Summary
Vigna unguiculata is an annual legume which belongs to the genus Vigna that consist of more than 200 species. Nigeria is the largest producer and consumer, accounting for about 45 percent of its world’s production [3,4] while the whole of Africa accounts for about 75% [5] It is a vegetable and grain crop for human who values it as a nutritional supplement to cereals and an extender of animal proteins, and it serves as a very safe fodder for livestock animals. Occurring flavonoids are potentially anti-allergic, anti-carcinogenic, Determination of the Flavonoid Composition of Seven Varieties of Vigna unguiculata (L.) Walp as Food and Therapeutic Values anti-inflammatory and anti-cancer activities [13]. It becomes necessary to investigate the composition of flavonoid in different parts of seven varieties of Vigna unguiculata consumed in Awka Anambra State Nigeria namely var. Iron beans in respect to their utilization as food and therapeutic values
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