Abstract
Annonamuricata plant parts possess a broad range of medicinal and biological properties. This research compared the chemical composition and antioxidant properties of Annonamuric at aparts. Proximate, mineral, total phenol and total flavonoid content as well as invitro antioxidant activity were examined. Results revealed the leaves contained significantly(p<0.05) higher composition of moisture (8.69±0.22%), ash (4.60±0.02%), protein (14.53±0.11%), crude fat (10.28±0.03%),chromium (0.38±0.05 mg/100g), nickel (1.75±0.04mg/100g), total phenol (1.01±0.03mgpyrocatechol/mL) and total flavonoid (1.12±0.03mgGAE/mL)compared to the respective values for root. Carbohydrate (9.29±0.24%), lead (0.13±0.02mg/100g) and cobalt (1.93±0.02mg/100g) composition was significantly lower(p<0.05) in the leaves compared to the respective compositions in the root. The leaf and root extract exhibited a concentration-dependent increase in hydroxyl radical scavenging activity with no observable(p<0.05)difference in their EC50 value. This study suggests the leaves of A. muricata found in Covenant University had better chemical composition when compared to the root. Nonetheless, these plant parts may be further exploited for not only their nutritive composition and mineral content but also a natural source of antioxidant agents.
Highlights
Plants are a rich bio resource of natural products and phytoconstituents which make them potent as functional foods and for treatment and management of diseases.[1]
Annona muricata L. commonly known as soursop, graviola, guanabana and sirsak which belongs to the Annonaceae family, is found in tropical and subtropical regions such as South and Central America, Asia and Africa including Nigeria.[1]
The current study was carried out to compare the proximate composition, mineral content and in vitro antioxidant activity of Annona muricata leaves and roots found in Covenant University, Ota, Nigeria
Summary
Plants are a rich bio resource of natural products and phytoconstituents which make them potent as functional foods and for treatment and management of diseases.[1]. The fruit is 15-30 cm long with an oval irregular shape and sparse soft green curved spines It has a white cotton like mesocarp which is fibrous, contains shiny black seeds, a sour taste, pleasing flavour and aroma.[4] Extensive phytochemical evaluations carried out on Annona muricata L. different parts (leaves, roots, fruits, stem, bark and seeds) have shown the presence of several bioactive compounds such as alkaloids, megastigmanes, flavonol triglycosides, phenolics, cyclopeptides, essential oils and annonaceous acetogenin compounds. The current study was carried out to compare the proximate composition, mineral content and in vitro antioxidant activity of Annona muricata leaves and roots found in Covenant University, Ota, Nigeria
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