Changes in Vitamin E and β-Carotene Contents in Various Edible Cassava Leaves (Manihot esculenta Crantz) of Different Ages across Multiple Seasons
Vitamin E and carotenoids belong to a group of bioactive compounds that have an important effect on human health. The present study aims to investigate for the first time the concentration of vitamin E, α-, γ-, and δ-tocopherol, and β-carotene in edible cassava leaves during different ages. The anal...
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Wiley
2020-01-01
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| Series: | International Journal of Agronomy |
| Online Access: | http://dx.doi.org/10.1155/2020/4671018 |
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| author | Alphonse Laya Benoît B. Koubala |
| author_facet | Alphonse Laya Benoît B. Koubala |
| author_sort | Alphonse Laya |
| collection | DOAJ |
| description | Vitamin E and carotenoids belong to a group of bioactive compounds that have an important effect on human health. The present study aims to investigate for the first time the concentration of vitamin E, α-, γ-, and δ-tocopherol, and β-carotene in edible cassava leaves during different ages. The analysis was performed using colorimetry and high-performance liquid chromatograph (HPLC) methods. A significant difference was found among α-, γ-, and δ-tocopherol concentrations in leaves; γ- and α-tocopherol isomer contents were the predominant in amount, respectively. Among the leaves, AD variety harvested at 6 months after planting (MAP) was the highest in total vitamin E (222 μgα-TE/g). However, the highest γ-tocopherol content (2782 μg/100g) and the content of biologically active vitamin E (1244 μg/100g) were found in EN variety at 6MAP, whereas the highest value (42 μg/g) of β-carotene was found in AD variety at 12MAP. Total vitamin E and tocopherol isomers composition varied among varieties and seasons as did β-carotene. The effects of varieties and harvest ages on the biosynthesis regulation of these compounds were confirmed by principal component analysis (F1x F2: 74.34%). Edible cassava leaves can be considered as sources of vitamin E for natural dietary antioxidant during different ages, and the best time to harvest EN and AD varieties is at 6MAP on the basis of α-tocopherol equivalent or content of biologically active vitamin E content, and EN and AD varieties performed the overall best. Thus, the edible cassava leaves are among the leafy vegetables that could be helpful to suggest as a part of daily meal for health benefits and pharmaceutical purposes. |
| format | Article |
| id | doaj-art-f38299d7c6be43adae31a592b0b2d567 |
| institution | Kabale University |
| issn | 1687-8159 1687-8167 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
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| series | International Journal of Agronomy |
| spelling | doaj-art-f38299d7c6be43adae31a592b0b2d5672025-02-03T06:00:49ZengWileyInternational Journal of Agronomy1687-81591687-81672020-01-01202010.1155/2020/46710184671018Changes in Vitamin E and β-Carotene Contents in Various Edible Cassava Leaves (Manihot esculenta Crantz) of Different Ages across Multiple SeasonsAlphonse Laya0Benoît B. Koubala1Department of Biological and Chemistry Sciences, Faculty of Science, University of Maroua, P. O. Box 46, Maroua, CameroonDepartment of Biological and Chemistry Sciences, Faculty of Science, University of Maroua, P. O. Box 46, Maroua, CameroonVitamin E and carotenoids belong to a group of bioactive compounds that have an important effect on human health. The present study aims to investigate for the first time the concentration of vitamin E, α-, γ-, and δ-tocopherol, and β-carotene in edible cassava leaves during different ages. The analysis was performed using colorimetry and high-performance liquid chromatograph (HPLC) methods. A significant difference was found among α-, γ-, and δ-tocopherol concentrations in leaves; γ- and α-tocopherol isomer contents were the predominant in amount, respectively. Among the leaves, AD variety harvested at 6 months after planting (MAP) was the highest in total vitamin E (222 μgα-TE/g). However, the highest γ-tocopherol content (2782 μg/100g) and the content of biologically active vitamin E (1244 μg/100g) were found in EN variety at 6MAP, whereas the highest value (42 μg/g) of β-carotene was found in AD variety at 12MAP. Total vitamin E and tocopherol isomers composition varied among varieties and seasons as did β-carotene. The effects of varieties and harvest ages on the biosynthesis regulation of these compounds were confirmed by principal component analysis (F1x F2: 74.34%). Edible cassava leaves can be considered as sources of vitamin E for natural dietary antioxidant during different ages, and the best time to harvest EN and AD varieties is at 6MAP on the basis of α-tocopherol equivalent or content of biologically active vitamin E content, and EN and AD varieties performed the overall best. Thus, the edible cassava leaves are among the leafy vegetables that could be helpful to suggest as a part of daily meal for health benefits and pharmaceutical purposes.http://dx.doi.org/10.1155/2020/4671018 |
| spellingShingle | Alphonse Laya Benoît B. Koubala Changes in Vitamin E and β-Carotene Contents in Various Edible Cassava Leaves (Manihot esculenta Crantz) of Different Ages across Multiple Seasons International Journal of Agronomy |
| title | Changes in Vitamin E and β-Carotene Contents in Various Edible Cassava Leaves (Manihot esculenta Crantz) of Different Ages across Multiple Seasons |
| title_full | Changes in Vitamin E and β-Carotene Contents in Various Edible Cassava Leaves (Manihot esculenta Crantz) of Different Ages across Multiple Seasons |
| title_fullStr | Changes in Vitamin E and β-Carotene Contents in Various Edible Cassava Leaves (Manihot esculenta Crantz) of Different Ages across Multiple Seasons |
| title_full_unstemmed | Changes in Vitamin E and β-Carotene Contents in Various Edible Cassava Leaves (Manihot esculenta Crantz) of Different Ages across Multiple Seasons |
| title_short | Changes in Vitamin E and β-Carotene Contents in Various Edible Cassava Leaves (Manihot esculenta Crantz) of Different Ages across Multiple Seasons |
| title_sort | changes in vitamin e and β carotene contents in various edible cassava leaves manihot esculenta crantz of different ages across multiple seasons |
| url | http://dx.doi.org/10.1155/2020/4671018 |
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