Antioxidant activity and soluble sugars of African ginger (Siphonochilus aethiopicus) in response to irrigation regimen and nitrogen levels
African ginger (Siphonochilus aethiopicus), as a medicinal plant, is known for its medicinal properties, containing various antioxidant compounds and carbohydrates. Rhizome yield is improved by water regimens and fertilizers applied at plant phenological stages. However, the rhizomatous herb, which...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2017-07-01
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| Series: | Acta Agriculturae Scandinavica. Section B, Soil and Plant Science |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/09064710.2017.1293723 |
| _version_ | 1797684413401661440 |
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| author | S. N. Mokgehle S. Z. Tesfay H. T. Araya C. P. du Plooy |
| author_facet | S. N. Mokgehle S. Z. Tesfay H. T. Araya C. P. du Plooy |
| author_sort | S. N. Mokgehle |
| collection | DOAJ |
| description | African ginger (Siphonochilus aethiopicus), as a medicinal plant, is known for its medicinal properties, containing various antioxidant compounds and carbohydrates. Rhizome yield is improved by water regimens and fertilizers applied at plant phenological stages. However, the rhizomatous herb, which is traditionally used for the treatment of asthma, inflammation and malaria has limited information on water and nitrogen requirements for its production. This study assessed the effect of irrigation regimens (30%, 50% and 70% allowable depletion level (ADL) and nitrogen (N) levels (0, 50, 100, 150 and 200 kg ha−1) on antioxidant activity and carbohydrates on plant leaf, root and rhizome. The interaction treatment effect of severely stressed (70% ADL) with the N application of 100 kg ha−1 had significant effect on leaf phenolic concentration (87.02 ± 2.51 mg g−1 gallic acid equivalent). Interaction effect of moderately stressed (50% ADL) and severely stressed (70% ADL) treatment with N application rate of 0 kg ha−1 had significant effect on plant flavonoids and phenolics in all plant parts. In plant carbohydrates, root had high sucrose content (47.68 ± 9.0 mg g−1 dry weight) with the application of low N (0 kg ha−1) grown under severely stressed treatment. In conclusion, this implies that different S. aethiopicus parts can produce substantial amount of antioxidants and carbohydrates, as exhibited under low N and reduced water supply applied during the phenological cycle. |
| first_indexed | 2024-03-12T00:30:16Z |
| format | Article |
| id | doaj.art-81c24508bcbb4fa894afd3d3dae2b0c3 |
| institution | Directory Open Access Journal |
| issn | 0906-4710 1651-1913 |
| language | English |
| last_indexed | 2024-03-12T00:30:16Z |
| publishDate | 2017-07-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Acta Agriculturae Scandinavica. Section B, Soil and Plant Science |
| spelling | doaj.art-81c24508bcbb4fa894afd3d3dae2b0c32023-09-15T10:21:31ZengTaylor & Francis GroupActa Agriculturae Scandinavica. Section B, Soil and Plant Science0906-47101651-19132017-07-0167542543410.1080/09064710.2017.12937231293723Antioxidant activity and soluble sugars of African ginger (Siphonochilus aethiopicus) in response to irrigation regimen and nitrogen levelsS. N. Mokgehle0S. Z. Tesfay1H. T. Araya2C. P. du Plooy3School of Agricultural, Earth and Environmental Sciences, University of KwaZulu-NatalSchool of Agricultural, Earth and Environmental Sciences, University of KwaZulu-NatalARC-Roodeplaat, Vegetable and Ornamental PlantARC-Roodeplaat, Vegetable and Ornamental PlantAfrican ginger (Siphonochilus aethiopicus), as a medicinal plant, is known for its medicinal properties, containing various antioxidant compounds and carbohydrates. Rhizome yield is improved by water regimens and fertilizers applied at plant phenological stages. However, the rhizomatous herb, which is traditionally used for the treatment of asthma, inflammation and malaria has limited information on water and nitrogen requirements for its production. This study assessed the effect of irrigation regimens (30%, 50% and 70% allowable depletion level (ADL) and nitrogen (N) levels (0, 50, 100, 150 and 200 kg ha−1) on antioxidant activity and carbohydrates on plant leaf, root and rhizome. The interaction treatment effect of severely stressed (70% ADL) with the N application of 100 kg ha−1 had significant effect on leaf phenolic concentration (87.02 ± 2.51 mg g−1 gallic acid equivalent). Interaction effect of moderately stressed (50% ADL) and severely stressed (70% ADL) treatment with N application rate of 0 kg ha−1 had significant effect on plant flavonoids and phenolics in all plant parts. In plant carbohydrates, root had high sucrose content (47.68 ± 9.0 mg g−1 dry weight) with the application of low N (0 kg ha−1) grown under severely stressed treatment. In conclusion, this implies that different S. aethiopicus parts can produce substantial amount of antioxidants and carbohydrates, as exhibited under low N and reduced water supply applied during the phenological cycle.http://dx.doi.org/10.1080/09064710.2017.1293723fertilizer effectsplant secondary metaboliteswater deficitssoil moisture |
| spellingShingle | S. N. Mokgehle S. Z. Tesfay H. T. Araya C. P. du Plooy Antioxidant activity and soluble sugars of African ginger (Siphonochilus aethiopicus) in response to irrigation regimen and nitrogen levels Acta Agriculturae Scandinavica. Section B, Soil and Plant Science fertilizer effects plant secondary metabolites water deficits soil moisture |
| title | Antioxidant activity and soluble sugars of African ginger (Siphonochilus aethiopicus) in response to irrigation regimen and nitrogen levels |
| title_full | Antioxidant activity and soluble sugars of African ginger (Siphonochilus aethiopicus) in response to irrigation regimen and nitrogen levels |
| title_fullStr | Antioxidant activity and soluble sugars of African ginger (Siphonochilus aethiopicus) in response to irrigation regimen and nitrogen levels |
| title_full_unstemmed | Antioxidant activity and soluble sugars of African ginger (Siphonochilus aethiopicus) in response to irrigation regimen and nitrogen levels |
| title_short | Antioxidant activity and soluble sugars of African ginger (Siphonochilus aethiopicus) in response to irrigation regimen and nitrogen levels |
| title_sort | antioxidant activity and soluble sugars of african ginger siphonochilus aethiopicus in response to irrigation regimen and nitrogen levels |
| topic | fertilizer effects plant secondary metabolites water deficits soil moisture |
| url | http://dx.doi.org/10.1080/09064710.2017.1293723 |
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