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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Ciência e Tecnologia de Alimentos
2015
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| Online Access: | https://www.redalyc.org/articulo.oa?id=395940120005 |
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| _version_ | 1866816128323420160 |
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| author | Nozipho Mgcibelo MOTSA |
| author_facet | Nozipho Mgcibelo MOTSA |
| contents | Influence of agro-ecological production areas on antioxidant activity, reducing sugar content, and selected phytonutrients of orange-fleshed sweet potato cultivars Nozipho Mgcibelo MOTSA Albert Thembinkosi MODI Tafadzwanashe MABHAUDHI Agrociencias Agro phytonutrients reducing sugars ecological areas sweet potato cultivars Sweet potato is an important staple, and it is mainly known for its contribution of β-carotene in human diet. The effects of cultivar and habitat on this pigment and other nutritional characteristics of the crop still require investigation. In this study, three locally bred cultivars of sweet potato, two of which are orange-fleshed, were grown in three different agro-ecological areas to determine soluble sugar content, β-carotene, and total antioxidants of roots. In addition antioxidant activity, total carotenoids, and chlorophyll content were determined in edible leaves. Reducing sugars, β-carotene, total antioxidants capacity, total carotenoids, and chlorophyll content were significantly affected by environmental conditions. The location at lower altitude and closer to the coastline showed high evapotranspiration, thus reducing sugar content, antioxidant activity, and phytonutrients in both storage roots and leaves. Absence of water stress in agro-ecological locations further inland and at higher altitudes was associated with an increase in these compounds. Free radical scavenging activity of DPPH was higher in the storage roots (610.49 μmoles TE/100g) than in the leaves (426.06 μmoles TE/100g); nevertheless, opposite results were found for the ferric ion reducing activity (FRAP). The deep orange-fleshed cultivar A45 contained high β-carotene (15 mg/100g), which is enough to meet RDA for vitamin A. There is evidence of agro-ecological effect on sweet potato nutritional value. 2015 artículo científico 0101-2061 https://www.redalyc.org/articulo.oa?id=395940120005 en http://www.redalyc.org/revista.oa?id=3959 Ciência e Tecnologia de Alimentos application/pdf Sociedade Brasileira de Ciência e Tecnologia de Alimentos Ciência e Tecnologia de Alimentos (Brasil) Num.1 Vol.35 |
| format | Artículo científico |
| id | redalyc_395940120005 |
| language | en |
| publishDate | 2015 |
| publisher | Sociedade Brasileira de Ciência e Tecnologia de Alimentos |
| spellingShingle | Influence of agro-ecological production areas on antioxidant activity, reducing sugar content, and selected phytonutrients of orange-fleshed sweet potato cultivars Nozipho Mgcibelo MOTSA Agrociencias Agro phytonutrients reducing sugars ecological areas sweet potato cultivars Influence of agro-ecological production areas on antioxidant activity, reducing sugar content, and selected phytonutrients of orange-fleshed sweet potato cultivars Nozipho Mgcibelo MOTSA Albert Thembinkosi MODI Tafadzwanashe MABHAUDHI Agrociencias Agro phytonutrients reducing sugars ecological areas sweet potato cultivars Sweet potato is an important staple, and it is mainly known for its contribution of β-carotene in human diet. The effects of cultivar and habitat on this pigment and other nutritional characteristics of the crop still require investigation. In this study, three locally bred cultivars of sweet potato, two of which are orange-fleshed, were grown in three different agro-ecological areas to determine soluble sugar content, β-carotene, and total antioxidants of roots. In addition antioxidant activity, total carotenoids, and chlorophyll content were determined in edible leaves. Reducing sugars, β-carotene, total antioxidants capacity, total carotenoids, and chlorophyll content were significantly affected by environmental conditions. The location at lower altitude and closer to the coastline showed high evapotranspiration, thus reducing sugar content, antioxidant activity, and phytonutrients in both storage roots and leaves. Absence of water stress in agro-ecological locations further inland and at higher altitudes was associated with an increase in these compounds. Free radical scavenging activity of DPPH was higher in the storage roots (610.49 μmoles TE/100g) than in the leaves (426.06 μmoles TE/100g); nevertheless, opposite results were found for the ferric ion reducing activity (FRAP). The deep orange-fleshed cultivar A45 contained high β-carotene (15 mg/100g), which is enough to meet RDA for vitamin A. There is evidence of agro-ecological effect on sweet potato nutritional value. 2015 artículo científico 0101-2061 https://www.redalyc.org/articulo.oa?id=395940120005 en http://www.redalyc.org/revista.oa?id=3959 Ciência e Tecnologia de Alimentos application/pdf Sociedade Brasileira de Ciência e Tecnologia de Alimentos Ciência e Tecnologia de Alimentos (Brasil) Num.1 Vol.35 |
| title | Influence of agro-ecological production areas on antioxidant activity, reducing sugar content, and selected phytonutrients of orange-fleshed sweet potato cultivars |
| topic | Agrociencias Agro phytonutrients reducing sugars ecological areas sweet potato cultivars |
| url | https://www.redalyc.org/articulo.oa?id=395940120005 |