Abstract
Aim
The study investigated nematicidal activity of phytocompounds isolated from Piliostigma thonningii mature stem bark.
Methods
Compounds were extracted from the stem bark using solid–liquid extraction. Column chromatography was used to separate the phytocompounds and structures were characterized by LC–MS/MS QTRAP. Nematicidal activity of P. thonningii fractions were evaluated against second stage juveniles (J2) of Meloidogyne javanica.
Results
One tetracyclic diterpenoid (1), one glucosinolate (2), and two glycosylated flavonoids (3) and (4) that have strong nematicidal activity against second stage M. javanica juveniles from P. thonningii mature stem bark were identified. Nematicidal activity of the four compounds ranged from 59–99%. Compound 3 exhibited excellent nematicidal activity, 99 ± 1% that was comparable to that of the positive control fenamiphos at 100 mg/ml dose. Its activity increased from 79–99% as concentration was changed from 20 to 100 mg/ml.
Conclusion
The results of the present study shows that P. thonningii mature stem bark consist of phytocompounds that have potent nematicidal activity therefore, they could be associated in an integrated pest management program after further investigations.
Graphic Abstract
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Data Availability
Most of the data obtained have been included in this paper and remaining data can be obtained from the corresponding author upon request.
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Acknowledgements
The authors thank The Tobacco Research Center for LC-MSMS analysis and Bindura University of Science Education for the nematicidal activity assays and laboratory equipment and reagents.
Funding
The work was partially funded by a block grant from the research board of the Bindura University of Science Education.
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PD and CM designed the study and carried out the experimental work. PD and LG wrote the first draft and final draft. LG managed literature and corrected the first draft. All authors read and approved the final draft.
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Dzomba, P., Mureya, C. & Gwatidzo, L. Nematicidal Activity of phytocompounds from Piliostigma thonningii Stem Bark Against Meloidogyne javanica. Chemistry Africa 3, 937–947 (2020). https://doi.org/10.1007/s42250-020-00158-z
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DOI: https://doi.org/10.1007/s42250-020-00158-z