Abstract
Abstract
Background
“Bayoud” disease caused by Fusarium oxysporum f. sp. albedinis (Foa) poses a serious threat to date palm (Phoenix dactylifera L.) in Morocco. However, research studies performed to discover biological methods to control this disease remain limited. The present study has set objectives to determine antifungal activity of five plants extracts (Acacia cyanophylla, Cupressus atlantica, Eucalyptus torquata, Nerium oleander, and Schinus molle) against Foa and link this effect to their content in polyphenols and flavonoids as well as their antioxidant properties.
Results
Plant extracts showed significant differences (p < 0.05) regarding their antifungal activity. The extracts of E. torquata and C. atlantica showed the strongest antifungal effect resulting in the inhibition of mycelial growth, sporulation, and spore germination in a dose-dependent manner. In addition, there were significant differences among the examined plant extracts in respect to their total polyphenols (1.536–7.348 g GAE/100 g DW), flavonoids (0.986–5.759 g RE/100 g DW), and antioxidant properties measured by Trolox equivalent antioxidant capacity (TEAC) (7.47–38.97 mmol TE/100 g DW) and ferric-reducing antioxidant power (FRAP) assay (8.95–47.36 mmol TE/100 g DW). Moreover, the antifungal potential of plant extracts was found to be moderately to strongly correlated with their polyphenol and flavonoid contents as well as their antioxidant activity, implying that the effective inhibitory activity of these plant extracts is partly due to their richness in antioxidative secondary metabolites.
Conclusion
Our findings shed further light on plants as a-yet-untapped resource of bioactive compounds and constructed the foundation for the development of new biological approaches to best manage Bayoud disease.
Publisher
Springer Science and Business Media LLC
Subject
Pharmaceutical Science,Agricultural and Biological Sciences (miscellaneous),Medicine (miscellaneous)
Reference39 articles.
1. Bouhlali EDT, El Hilaly J, Ennassir J, Benlyas M, Alem C, Amarouch MY, Filali-Zegzouti Y (2018) Anti-inflammatory properties and phenolic profile of six Moroccan date fruit (Phoenix dactylifera L.) varieties. J King Saud Univ Sci 30(2018):519–526 https://doi.org/10.1016/j.jksus.2017.08.011
2. Bouhlali EDT, Ramchoun M, Alem C, Ghafoor K, Ennassir J, Zegzouti YF (2017) Functional composition and antioxidant activities of eight Moroccan date fruit varieties (Phoenix dactylifera L.). J Saudi Soc Agric Sci 16(3):257–264 https://doi.org/10.1016/j.jssas.2015.08.005
3. Moroccan ministry of agriculture and fisheries (2015). Investor’s guide in the agricultural sector in Morocco. Available online. http://www.fruitrop.com/en/content/download/33851/540304/version/12/file/. Accessed 8 Jun 2020.
4. Essarioui A, Sedra MH (2017) Lutte contre la maladie du bayoud par solarisation et fumigation du sol : Une expérimentation dans les palmeraies du Maroc. Cah Agric 26(4):45010 https://doi.org/10.1051/cagri/2017043
5. Essarioui A, Ben-Amar H, Khoulassa S, Meziani R, Amamou A, Mokrini F (2018) Gestion du bayoud du palmier dattier dans les oasis marocaines. Rev Mar Sci Agro 6(4):537–543