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Native Bacillus paralicheniformis isolate as a potential agent for phytopathogenic nematodes control
Estefany Chavarria-Quicaño1, Victor Contreras-Jácquez1, Armando Carrillo-Fasio2
1Laboratory of Industrial Biotechnology, Department of Food Science, Centro de Investigación en Alimentación y Desarrollo, Hermosillo, Mexico.
Frontiers in Microbiology
|August 17, 2023
Summary
Desert-isolated Bacillus paralicheniformis TB197 effectively controls plant-parasitic nematodes (PPNs). This bacterium shows high nematicidal activity, offering a sustainable solution for crop protection against damaging soil-borne pests.
Area of Science:
- Agricultural Science
- Microbiology
- Environmental Science
Background:
- Plant-parasitic nematodes (PPNs) cause significant global crop losses.
- Climate change exacerbates abiotic stresses, increasing crop susceptibility to PPNs.
- Beneficial microorganisms offer eco-friendly PPN control but must tolerate harsh environments.
Purpose of the Study:
- To isolate and characterize bacteria from the Northwestern Mexican Desert with potential for PPN control.
- To evaluate the efficacy of isolated bacteria and their metabolites against PPNs under various conditions.
Main Methods:
- Isolation of thermotolerant bacteria from desert rhizospheric soil.
- Screening of bacterial secretomes for in vitro nematicidal activity (NA).
- In vivo confirmation of NA using secretomes and endospores of selected isolates.
- Field and greenhouse trials evaluating efficacy against Meloidogyne spp. and Radopholus similis.
Main Results:
- Bacillus paralicheniformis TB197 exhibited the highest NA (>95%) against Meloidogyne incognita.
- TB197 endospores significantly reduced M. enterolobii infection severity (81%) and galling index (84%) in tomatoes.
- TB197 demonstrated an 81% reduction in root necrosis caused by Radopholus similis in bananas.
Conclusions:
- Bacillus paralicheniformis TB197 is a promising candidate for PPN management.
- Endospores and secondary metabolites of TB197 can be utilized in effective bionematicidal formulations.
- This discovery supports sustainable agriculture by providing a microbial solution for nematode control in stressed environments.
