Amylolytic and antibacterial activity of filamentous fungi isolated from the rhizosphere of different plants grown in the Tamanghasset region
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Date
2023-03-09
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Heliyon
Abstract
In the present study, we were interested in studying the amylolytic and antibacterial activity of
some filamentous fungi isolated from the rhizosphere of cultivated plants in Tamanghasset region.
Consequently, 11 pure strains belonging to the different fungal genera were isolated
Alternaria, Aspergillus, Cladosporium, Curvularia, Fusarium, Mucor and Penicillium. Positive result of
amylolytic activity was revealed on all the isolated strains, with important hydrolysis zones of
54.33 ± 1.15 mm, 54.00 ± 3.61 mm, 52.00 ± 6.08 mm and 51.33 ± 15.01 mm for Aspergillus
sp.1, Curvularia sp., Fusarium sp.2 and Mucor sp. respectively. In addition, analysis of variance
(ANOVA) of the means of hydrolysis zones diameters shows that the values linked by the same
letter do not show any significant difference at P < 0.05. Antibacterial activity of the isolated
fungal was demonstrated by the agar cylinder technique against four pathogenic bacterial strains.
The results showed a variability of the inhibition zones, thus the most important results were
recorded against S. aureus, E. coli and K. pneumonia for all fungi which produced inhibition zones
ranging from 15.33 ± 0.00 to 23.66 ± 1.71 mm. while all isolate had the lowest inhibition zone
against P. aeruginosa. In conclusion, the obtained results indicated the isolated filamentous fungi
have the potential to inhibit the four pathogenic bacterial strains, S. aureus, E. coli, K. pneumonia
and P. aeruginosa, while simultaneously showed significant amylolytic activity.