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Antagonistic activity of Sinorhizobium meliloti strains against pathogenic fungi isolated from alfalfa in Algerian Sahara

Research Paper | February 1, 2022

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Salim Azib, Abdelhak Idder, Sara Attab, Sofiane Bensalem, Ouiza Djeroudi

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Int. J. Biosci.20( 2), 247-254, February 2022

DOI: http://dx.doi.org/10.12692/ijb/20.2.247-254


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The purpose of this study was to identify the fungal species attacking roots and foliage of alfalfa in Ouargla and assess the antagonistic potential, in vitro, of three S. meliloti strains (E543, E141 and O211) isolated from alfalfa root nodules on the growth of these fungi. Results showed that alfalfa plants could be attacked by several fungal pathogens. Based on the macroscopic and microscopic characters, three fungal species were identified as Alternaria sp., Fusarium sp. and Curvulria sp. The antagonistic test have shown that S. meliloti strains significantly reduced the growth of Curvularia sp. at 31.27%, Alternaria sp. at 40.12% and Fusarium sp. at 52.11%, respectively, thus confirming their role in controlling the growth of many soil-borne plant pathogenic fungi belonging to different genera.


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Antagonistic activity of Sinorhizobium meliloti strains against pathogenic fungi isolated from alfalfa in Algerian Sahara

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