Antioxidant and Phytochemical Studies of 31 Cowpeas (Vigna unguiculata (L. Walp.)) Genotypes from Burkina Faso

Abstract

Antioxidant compounds of dietary plants have been widely studied because of their bioactive properties. The objective of this research study was to analyse the health enhancing attributes of 31 cowpeas varieties from Burkina Faso. Significant variations were observed in the phenolic content as well as the antioxidant and anti-lipid peroxidation activities amongst the cowpea varieties. Pearson correlation coefficient analysis showed that the ferric reducing ability (r = 0.954) and anti-lipid peroxidation (r = 0.616) were positively correlated with the total phenolic content. A significant relationship between cowpea ferric reducing ability and anti-lipid peroxidation (r = 0.64) was also revealed. However, nitric oxide scavenging potential was found not to be related to its total phenolic and total flavonoid content. 2,2-diphenyl-1-picrylhydrazyl (DPPH) and hydroxyl radicals scavenging potentials were not correlated with the total flavonoid content. The pigmented seeds of cowpea varieties possess higher total phenolic, total flavonoid content, ferric reduction ability, and anti-lipid peroxidation activities than the colourless ones. The results obtained from this study suggest that Burkina Faso cowpea cultivars are rich in phenolic compounds and have significant antioxidant and anti-lipid peroxidation activities. Consumption of the cowpea, particularly of coloured cowpea seed varieties, should be beneficial for chronic human diseases prevention.

Phytochemical Composition and Antioxidant Activity of Balanites aegyptiaca, Securidaca longepedunculata and Acacia gourmaensis Used against Seed-borne Fungi in Burkina Faso

“…The ability of plant extracts to scavenge the DPPH (2,2diphenyl1picrylhydrazyl) radical was evaluated at 517 nm, as described by Sombié, et al [21]. The DPPH Radical Scavenging Activity was expressed as µg of ascorbic acid equivalent per g of extract (µg AAE/g of extract).…”

“…The ability of the plant extracts to reduce iron (III) to iron (II) was measured at 700 nm following the procedure described by Sombié, et al [21]. Iron (III) reducing activity was determined as µg quercetin equivalent per g of dry seed extract (µg QE/g of extract).…”

Effect of Organic (Jatropha Cake) and NPK Fertilizers on Improving Biochemical Components and Antioxidant Properties of Five Cowpea (Vigna unguiculata L. Walp.) Genotypes

“…The total phenolics and total flavonoids contents of fresh leaves extracts were determined respectively at 760 nm and 415 nm using the methods described by Sombié et al (2018). The total phenolics were expressed as mg of gallic acid equivalent per gram of fresh leaves weight (mg GAE/g of fresh leaves) and total flavonoids expressed as mg of quercetin equivalents (QE) per gram of fresh leaves weight (mg QE/g of fresh leaves).…”

“…(Cowpea) is one of the most important food legume crops in Burkina Faso. Cowpea is widely cultivated in Burkina Faso for its high nutritive value and health enhancing attributes (Sombié et al, 2018). Soil infertility is the most important constraint limiting crop yield among resource-poor farmers in developing countries (Ju et al, 2018).…”

Estudo da hidrólise ácida e enzimática da borra de café como alternativa de uso deste resíduo

“…é um dos alimentos e planta forrageira mais importante da região dos trópicos semi-áridos que incluem partes da Ásia, África, sul da Europa e dos Estados Unidos, América Central e do Sul. Os grãos de feijão-caupi possuem compostos bioativos com efeitos benéficos à saúde humana(SOMBIÉ et al, 2018). Dentre estes compostos, destacam-se os polifenois, que apresentam elevada atividade antioxidante(BARROS et al, 2017;NDERITU et al, 2013).No feijão-caupi, os compostos fenólicos concentram-se no tegumento dos grãos, conferindo a maior parte da coloração das sementes desta leguminosa.…”