Inhibition of renin-angiotensin system enzymes by leafy vegetables polyphenol extracts related to fertilizer micro-dosing and harvest time

Moussa, Modoukpè I. Djibril; Alashi, Adeola M.; Sossa-Vihotogbe, C.N.A.; Djenontin, A.J.; Baco, Mohamed Nasser; Akissoe, N. H.; Aluko, Rotimi E.

doi:10.17660/actahortic.2019.1238.9

Cited by 2 publications

(2 citation statements)

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“…Positive correlations found suggest that the measured antioxidant activities are promoted by similar sources of polyphenolic compounds, consistent with the report on positive correlation between phenolic content and radical scavenging activity of L. sativa (Viacava et al, 2014). Positive correlations found between TPC and catechin or quercetin contents were not expected but may be linked to structural changes within complex phenolic compounds due to conversion into hydrolysable forms, which increase reaction intensity with Folin Ciocalteu reagent (Djibril-Moussa et al, 2019). Given that low EC 50 values indicate greater antioxidant activities, significantly negative correlations found between DPPH-RSA and TFC or myricetin content as well as between FIC and TPC or gallic acid content suggest that flavonoids and phenolics were, respectively stronger contributor to DPPH-RSA and FIC in leafy vegetables.…”

Section: Correlation Between Polyphenolics and Antioxidant Activitiessupporting

confidence: 89%

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Fertilizer micro-dosing and harvesting time of indigenous leafy vegetables affect in vitro antioxidant activities

Moussa¹,

Alashi²,

Sossa-Vihotogbe³

et al. 2019

JFB

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Plant nutrient management can influence the type and level of polyphenolic compounds within leafy vegetables. Therefore, we investigated the effects of fertilizer micro-dosing and harvest time on antioxidant activities of aqueous polyphenolic extracts from Amaranthus cruentus, Ocimum gratissimum and Solanum macrocarpon. Plants were cultivated using urea alone or combined with cattle manure for three staggered harvest periods. Polyphenolics profile (RP-HPLC), DPPH, hydroxyl and superoxide radical scavenging activities, ferric ion reducing power, ferrous ion chelation and inhibition of linoleic acid oxidation were determined. Polyphenolic contents of A. cruentus (caffeic acid, myricetin, quercetin and rutin) and O. gratissimum (catechin and gallic acid) as well as antioxidant activities of the vegetables extracts (except hydroxyl radical scavenging by A. cruentus) were fertilizer micro-dose and harvest timedependent. Thus, combination of both factors highlighted the screening of optimal farming conditions for these vegetables in order to get leaf extracts possessing higher polyphenolic contents and antioxidant activities.

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Section: Correlation Between Polyphenolics and Antioxidant Activitiessupporting

confidence: 89%

“…TPC of the aqueous extracts was determined according to Djibril-Moussa et al (2019) method. Aqueous extracts (0.5 mg/mL) and gallic acid (25-300 μg/mL) were separately dissolved in aqueous methanol (50%, v/v).…”

Section: Total Phenolics Content (Tpc)mentioning

confidence: 99%