β-Carotene yield and productivity of orange-fleshed sweet potato (Ipomoea batatas L. Lam.) as influenced by irrigation and fertilizer application treatments

Laurie, S. M.; Faber, Mieke; Jaarsveld, Paul J van; Laurie, Robert; Plooy, C. P. du; Modisane, Pulane Charity

doi:10.1016/j.scienta.2012.05.017

Cited by 47 publications

(46 citation statements)

References 15 publications

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“…Lutein was the most abundant carotenoid in sweet potato leaves while All trans β-carotene was the most abundant carotenoid present in the roots. e findings of this study were in agreement with general observation of previous e vitamin C content in roots found in this study was comparable to 10 mg/100 g reported by [37], but was lower by genetics and cultural practices and hence vary between locations [5,24].…”

Section: Determination Of Tanninssupporting

confidence: 93%

“…For instance, the Orange fleshed sweet potato (OFSP) is a promising biofortified crop for sub-Saharan Africa (SSA) with high levels of β-carotene, a provitamin A carotenoid (pVAC) [4]. Biofortified OFSP has been proven to be affordable, convenient, and sustainable food source of pro-vitamin A carotenoids for combating vitamin A deficiency (VAD) in Kenya and other SSA countries [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Phytochemicals in Leaves and Roots of Selected Kenyan Orange Fleshed Sweet Potato (OFSP) Varieties

Abong

Muzhingi

Okoth

et al. 2020

International Journal of Food Science

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is study reports the inherent phytochemical contents in leaves and roots of nine sweet potato varieties from Kenya. Results indicated that vitamin C content varied significantly (푃 < 0.05) among the sweet potato varieties regardless of the plant part, leaves having significantly (푃 < 0.05) higher levels than in the roots. Total flavonoids and phenolic compounds differed significantly (푃 < 0.05) among varieties, higher values were found in leaves than in roots. Flavonoid contents in roots ranged from below detectable limits (Whitesp) to 25.8 mg CE/100 g (SPK031), while in leaves it ranged from 4097 to 7316 mg CE/100 g in SPK4 and Kenspot 5, respectively. Phenolic content was below detectable limits in the roots of whitesp but it was in substantial amounts in orange fleshed varieties. e β-carotene content was significantly (푃 < 0.05) higher in leaves (16.43-34.47 mg/100 g dry weight) than in roots (not detected-11.1 mg/100 g dry weight). Total and phytic phosphorus were directly correlated with phytate contents in leaves and the roots. Tannins and soluble oxalates varied significantly (푃 < 0.05) with variety and plant part being higher in leaves. e current information is important for ration formulations and dietary recommendations utilizing sweet potato leaves and roots. Future studies on effects of processing methods on these phytochemicals are recommended.

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Section: Determination Of Tanninssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Phytochemicals in Leaves and Roots of Selected Kenyan Orange Fleshed Sweet Potato (OFSP) Varieties

Abong

Muzhingi

Okoth

et al. 2020

International Journal of Food Science

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“…This loss could be due to the sweet potato plant ultimately using up the iron in the storage root. Iron content from all genotypes at average MAP (0.12 mg/100 g) observed in this study is lower than what Sanoussi et al (2016) (0.63 mg/100 g), Bradbury and Holloway (1988) (0.93 mg/100 g) and Laurie et al (2012) (0.995 mg/100 g) reported in Benin, Australia and South Africa, respectively. Thus, Malawian genotypes in the study need to be bred for increased iron levels since lack of iron is the main cause of severe anaemia in children (Sanoussi et al, 2013).…”

Section: Effect Of Genotype Age and Peeling On Iron Contentcontrasting

confidence: 71%

“…This can be attributed to dynamics in soil mineral content and interaction between minerals and genotypes (Woolfe, 1992;Ingabire and Vasanthakaalam, 2011;Ukom et al, 2011). Zhang et al (2003) and Laurie et al (2012) showed that sweet potato is rich in various minerals including K, Ca, Fe, P, Se, Cu and Zn. Iron, zinc and copper are usually present in the soil in adequate to excess amounts (Table 6) (Laurie et al, 2012), such that deficiencies are due to their presence in unavailable forms rather than their lack.…”

Section: Effect Of Age On Ascorbic Contentmentioning

confidence: 99%

“…Zhang et al (2003) and Laurie et al (2012) showed that sweet potato is rich in various minerals including K, Ca, Fe, P, Se, Cu and Zn. Iron, zinc and copper are usually present in the soil in adequate to excess amounts (Table 6) (Laurie et al, 2012), such that deficiencies are due to their presence in unavailable forms rather than their lack. Environmental factors such as leached soils, acid, sandy soils, organic soils, intensively cropped soils, soils with high pH, and eroded soils also affect solubility of micronutrients (Brady and Weil, 2002).…”

Section: Effect Of Age On Ascorbic Contentmentioning

confidence: 99%

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Analysis of micronutrients variations among sweet potato (Ipomoea batatas [L.] Lam) genotypes in Malawi

Chipungu¹,

Changadeya²,

Ambali³

et al. 2017

J. Agric. Biotech. Sustain. Dev.

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Sweet potato (Ipomoea batatas [L.] Lam) is an important root crop in Malawi and Sub-Saharan Africawhere micronutrient deficiency is an eminent health problem. Using 15 sweet potato genotypes grown in a randomized complete block design at Bvumbwe Research Station, a study was undertaken to determine the extent of variability of selected micronutrients in the genotypes as influenced by storage root age and peeling. Analysis of variance (ANOVA) showed significant (p≤ 0.01) variability among genotypes for dry mater, β-carotene, ascorbic acid levels and reduction of β-carotene due to peeling across all ages. Significant (p ≤ 0.05) variations in zinc, iron and copper were also observed among all genotypes. Peeling reduced β-carotene, ascorbic acid levels, iron, zinc and copper content while late harvesting resulted in low iron, zinc and copper. Therefore, 5 months after planting (MAP) and 4 MAP are recommended for high levels of β-carotene and ascorbic acid and iron, zinc and copper, respectively. Ten genotypes exhibited acceptable levels of dry mater of ≥30%. Zondeni (10.9 mg/100 g, WW) and Babache (23.84 mg/100 g, WW) had highest levels of β-carotene and ascorbic acid, respectively. Mzungu displayed the highest levels of Iron (0.67 mg/100 g, DW) and zinc (0.63 mg/100 g, DW) while Yoyera (0.61 mg/100 g, DW) had the highest levels of copper. Variations of various traits entail potential to breed for higher levels of micronutrients.Key words: Sweet potato, genotypes, β-carotene, ascorbic acid, iron, zinc, copper, peeling, storage root age. INTRODUCTIONApproximately one billion (795 million) people from developing countries suffer from hunger, malnutrition and poverty (FAO, 2015). Various reasons including climate change, environmental degradation, dwindling of natural resources and an ever increasing population have been implicated. In 2015, global population was estimated at 7.3 billion and was expected to climb up to about 9.7 billion in 2050 when nearly 90% of the population will be in resource poor developing countries of Asia, Africa and Latin America (James, 2015). The UN population projection shows that the trend will continue until the end of this century when the global population will reach 10.8 billion or more (UN DESA, 2015). Such increases in global population will result in ever increasing number of food in-secure people, who by definition are people with no physical and economic access to enough safe and nutritious food which meets their dietary needs at all times (FAO, 1996). However, over 3 billion people suffer from a different, sneakier form of hunger than the simple lack of sufficient quantities of foodstuffs referred to as micronutrient malnutrition or "hidden hunger" which is caused by a lack of food of sufficient dietary quality (Kennedy et al., 2003; FAO, 2013). Monotonous diets which are a hallmark of Sub-Saharan countries, based on cereals and other starchy staple foods frequently fail to deliver sufficient quantities of essential minerals and vitamins like Iodine, Iron, Zinc and Vitamin A (D...

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Biofortification of Edible Plants

Benkeblia

2020

Vitamins and Minerals Biofortification of Edible Plants

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β-Carotene yield and productivity of orange-fleshed sweet potato (Ipomoea batatas L. Lam.) as influenced by irrigation and fertilizer application treatments

Cited by 47 publications

References 15 publications

Phytochemicals in Leaves and Roots of Selected Kenyan Orange Fleshed Sweet Potato (OFSP) Varieties

Phytochemicals in Leaves and Roots of Selected Kenyan Orange Fleshed Sweet Potato (OFSP) Varieties

Analysis of micronutrients variations among sweet potato (Ipomoea batatas [L.] Lam) genotypes in Malawi

Biofortification of Edible Plants

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