Henri Tibo Ambata Ambata1,
Moïse Ntah A Ayong1,
Benissa Mylaure Jiogue1,
Jeanne Fabiola Ndondoni Dikongue1,
Felecite Nyami Ndjen1, 2,
Francine Pamela Noumegna Kamsu1,
Olivier Youassi Youassi1,
Séverin Nguemezi Tchameni1,
,
Modeste Lambert Sameza1 1Laboratory of Biochemistry, Faculty of Science, University of Douala, PO Box 24157 Douala Cameroon
2Institute of Agricultural Research for Development (IRAD), CEREPAH, La Dibamba, P. O. Box 243 Douala, Cameroon
American Journal of Microbiological Research.
2023,
Vol. 11 No. 2, 40-46
DOI: 10.12691/ajmr-11-2-2
Copyright © 2023 Science and Education PublishingCite this paper: Henri Tibo Ambata Ambata, Moïse Ntah A Ayong, Benissa Mylaure Jiogue, Jeanne Fabiola Ndondoni Dikongue, Felecite Nyami Ndjen, Francine Pamela Noumegna Kamsu, Olivier Youassi Youassi, Séverin Nguemezi Tchameni, Modeste Lambert Sameza. Antagonistic Effect and Antifungal Activity of Organic Extracts of
Trichoderma harzianum and
Trichoderma asperelloides toward
Fusarium oxysporum elaedis, the Causal Agent of Fusariose Oil Palm.
American Journal of Microbiological Research. 2023; 11(2):40-46. doi: 10.12691/ajmr-11-2-2.
Correspondence to: Séverin Nguemezi Tchameni, Laboratory of Biochemistry, Faculty of Science, University of Douala, PO Box 24157 Douala Cameroon. Email:
tchameni1@yahoo.frAbstract
This study aimed to evaluate the antagonistic effet and organic extract of T. harzianum and T. asperolloides against Fusarium oxysporum elaedis, agent responsible of fusariose of oil palm (Elaeis guineensis Jacq). In vitro, the antagonistic activities were carried out by direct confrontation and antibiosis. The ability of Trichoderma spp to produce hydrolytic enzymes was determined in specific solid media. After fermentation, organic extracts were obtained, phenolic and flavonoid compounds were evaluated and their antifungal activity was done in vitro against mycelial growth of the pathogen. The results obtained show that the both antagonists used have significantly reduced the mycelian growth of the pathogen. In direct cofrontation, the inhibition of myelian growth was 64.58% and 70.8% respectively, for T. harzianum and T.asperelloides. The non-volatile compounds produced the inhibition of mycelial growth of Fusarium oxysporum. The inhibition was 75.0% and 71.0%, respectively. The inhibition percentage of volatile compounds was 43.75% and 25.00% respectively. T. harzianum and T. asperelloides produced respectively, cellulases (62.3mm and 66.3mm), lipases (43mm and 66.7mm), amylases (44.6 mm and 68.3 mm) and proteases (54.6 mm and 52mm). The organic extract of these antagonists’ content phenolic and flavonoids compounds. At 400 µg/ml these organic extracts significantly inhibited the mycelial growth of F. oxysporum. The inhibition was 69.29% and 40.69% respectively for crude extract of T. harzianum and T. asperelloides. There were significant and positive correlation between polyphenol and flavonoid content and the inhibition of mycelial growth of the pathogen. These results showed that, T. harzianum could be used to develop a bioproduct to protect oil palm.
Keywords