Selection of bacterial isolates with fungal inhibition against alfalfa phytopathogens to constitute a bacterial consortium = Selección de cepas bacterianas con capacidad antifúngica contra fitopatógenos de alfalfa para constituir un consorcio bacteriano
Alfalfa breeding programs require environmentally friendly alternatives to improve plant growth and health. Plant Growth Promoting Rhizobacteria (PGPR) and endophytic bacteria offer a biological solution as they can inhibit phytopathogenic fungi by producing antifungal compounds or enzymes. In Argen...
| Autores principales: | , , , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
Facultad de Ciencias Agropecuarias, Universidad Nacional de Córdoba
2024
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/18578 https://revistas.unc.edu.ar/index.php/agris/issue/view/2971 https://doi.org/10.31047/1668.298x.v41.n1.41895 |
| Sumario: | Alfalfa breeding programs require environmentally friendly alternatives to improve plant growth and health. Plant Growth Promoting Rhizobacteria (PGPR) and endophytic bacteria offer a biological solution as they can inhibit phytopathogenic fungi by producing antifungal compounds or enzymes. In Argentina, alfalfa is primarily affected by Colletotrichum trifolii (Ct) and Phytophthora megasperma (Pm). The objectives of this study were to select bacterial isolates with antifungal inhibition against Ct and Pm and identify a biocontroller isolate compatible with the rhizobia INTA5 has and with low-N2 O emissions, to constitute an eco-friendly bacterial consortium. Ten isolates demonstrated antifungal inhibition, with mean Inhibition Percentage (IP) values between 41.74-91.28 for Ct and 56.23-77.59 for Pm compared to the control. Among these isolates, B2, B4, SC6, and MN1 showed the highest inhibition performance and were selected to evaluate their compatibility with INTA5. Only B4 exhibited compatibility, which was further evaluated against Ct in an experiment with alfalfa seedlings under controlled conditions. The alfalfa seedlings treated with B4 increased the plant survival number against Ct. The availability of a bacterial consortium that promotes biocontrol and biological nitrogen fixation represents the preferred strategy for alfalfa breeding programs. |
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