Biochemical and antioxidant properties of cream and orange-fleshed sweet potato

Abstract

The rate of micronutrient deficiency has been on an increase since the last decade and the utilization of bio-fortified crops could help to alleviate this deficiency and food insecurity in Africa especially in Nigeria. The aim of this study was to compare the biochemical and antioxidant properties of cream-fleshed and orange-fleshed sweet potato. The varieties of OFSP used in this study were mother's delight (MDP) and king J (KJP) orange-fleshed sweet potato while the other variety was cream-fleshed sweet potato (CFSP). The tubers were processed into flour and analyzed for proximate, minerals, anti-nutrient and antioxidant properties using standard methods. The ash content ranged from 4.60 to 7.20%, carbohydrate content ranged between 73.47 and 78.61%. MDP has the highest beta carotene content with 18.83 mg/100g followed by KJP and CFSP. Magnesium value ranged between 124.0 and 148.2 mg/100g, potassium ranged from 1226.5 to 2350.0 mg/100g. Sodium-potassium ratio (Na/K) was <1. The antioxidants properties evaluated were all higher in OFSP than CFSP. The bio-fortified sweet potato showed an improved biochemical and antioxidant properties compared to the CFSP, thus OFSP will be suitable to combat micronutrient deficiency and food insecurity in Africa.

Blanching effect on physicochemical and functional properties of flours processed from peeled and unpeeled white‐fleshed sweet potato Algerian cultivar

“…Protein content of peeled SP-based flours was higher than the unpeeled SP-based flours which is in consistent with other studies (Chikpah et al, 2020;Shaari et al, 2021). The crude protein content ranged between 5.83 and 6.28% which was low compared to that in orange fleshed (Chikpah et al, 2020) and purple fleshed (Shaari et al, 2021) sweet potato flour, but higher than that reported by other studies (Senanayake et al, 2013;Ohizua et al, 2017;Oloniyo et al, 2021). The protein content of agricultural products depends not only on varieties but also varies with environmental location (Dereje et al, 2020).…”

“…Therefore, conversion of fresh tubers into flours through appropriate techniques is quite important to preserve the bioactive compounds contained in the raw material (Khanh et al, 2018). The TPC recorded in flour samples (Table 1) ranged from 53.15 to 132.58 mgGAE/100 g, which were lower than those reported in other studies (Khanh et al, 2018;Chikpah et al, 2020;Oloniyo et al, 2021); whereas, Abong et al (2020) did not detected polyphenols in white fleshed SP from Kenya. Oke & Workneh (2013) reported that a large variation in phenolic content is observed among sweet potato varieties.…”

Growing location and root maturity impact on the phenolic compounds, antioxidant activity and nutritional profile of different sweet potato genotypes

“…Particularly, Boni INTA presented a considerably high concentration (p < 0.05) with almost one order of magnitude over the Arapey genotype. The range of total carotenoid concentrations in orange-fleshed sweet potato roots found in previous studies is wide (16–1331 µg β-carotene/g dw) ( Kim et al, 2015 , Koala et al, 2013 , Oloniyo et al, 2021 , Othman et al, 2017 ). Remarkably, the content in Boni INTA was comparable to the higher values of that range.…”

Consumer Preferences for Boiled and Fried Sweet Potato in Central and Northern Côte d'Ivoire, West Africa

“…The presence of a considerable mineral in sweet potato indicates again the nutritional benefit in the adoption of releases cultivars. Indeed, minerals are desirable in the human body for many functions such as the cellular activity of enzymes, nerve responses, muscle contraction, blood clotting [39]. The health benefits of OFSP are important to consider in its promotion amongst farmers.…”