Evaluating the effect of 40% and 0% shading levels on the secondary metabolites, antifungal and anti-insect activities of extracts of Allium porrum cultivated hydroponically under greenhouse conditions
Journal of Medicinal Plants for Economic Development
| Field | Value | |
| Title | Evaluating the effect of 40% and 0% shading levels on the secondary metabolites, antifungal and anti-insect activities of extracts of Allium porrum cultivated hydroponically under greenhouse conditions | |
| Creator | Ntobela, Bulelwa Oguntibeju, Oluwafemi O. Rautenbach, Fanie Etsassala, Ninon G. Akinpelu, Enoch A. Nchu, Felix | |
| Description | Background: Allium species are generally reputed for their anti-pest properties; however, few studies have focused on optimising the quality and yield of anti-pest bioactive materials from these medicinal plants.Setting: Laboratory and greenhouse experiments were carried out on the Bellville campus of the Cape Peninsula University of Technology, Cape Town.Aims: This research study aimed to evaluate the effect of light intensity on the volatile constituents, antifungal and anti-insect activities of extracts obtained from Allium porrum L. cultivated hydroponically under greenhouse conditions.Methods: Seedlings of A. porrum were hydroponically grown under 40% shading and 0% shading conditions for 12 weeks. The phytochemical constituents of the aerial parts (leaf and bulb) of A. porrum were analysed. The antifungal activity against Fusarium oxysporum and the anti-insect activity on the grapevine mealybug (Planococcus ficus) was evaluated by microdilution and repellency bioassays, respectively.Results: Remarkably, the total polyphenol content was statistically higher (DF = 1, 6; F = 9.17; p 0.05) in plants exposed to 40% shade treatment. The gas chromatography-mass spectrometry (GC-MS) analysis revealed that the volatile compounds varied significantly (DF = 1; χ 2 = 3.435; p 0.05) between the two treatments. However, although a higher number of compounds (73) occurred in plants exposed to 40% shade than in those exposed to 0% shade (58), the shading effect on the number of compounds was not significant (DF = 1; χ 2 = 69.551; p 0.05). The acetone extracts of A. porrum that were cultivated under lower light irradiance showed a higher fungistatic activity against F. oxysporum in the antifungal bioassay.Conclusion: Broadly, this study revealed that lowering light intensity from 313 μmol m-2 s-1 to 153 μmol m-2 s-1 favoured a higher phenolic content, volatile constituents and higher anti-F. oxysporum activities in leeks. | |
| Publisher | AOSIS Publishing | |
| Date | 2022-05-10 | |
| Identifier | 10.4102/jomped.v6i1.144 | |
| Source | Journal of Medicinal Plants for Economic Development; Vol 6, No 1 (2022); 9 pages 2616-4809 2519-559X | |
| Language | eng | |
| Relation |
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:
https://jomped.org/index.php/jomped/article/view/144/460
https://jomped.org/index.php/jomped/article/view/144/461
https://jomped.org/index.php/jomped/article/view/144/462
https://jomped.org/index.php/jomped/article/view/144/463
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