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Luna-Bulbarela A, Romero-Gutiérrez MT, Tinoco-Valencia R, Ortiz E, Martínez-Romero ME, Galindo E, Serrano-Carreón L. Response of Bacillus velezensis 83 to interaction with Colletotrichum gloeosporioides resembles a Greek phalanx-style formation: A stress resistant phenotype with antibiosis capacity. Microbiol Res 2024; 280:127592. [PMID: 38199003 DOI: 10.1016/j.micres.2023.127592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 12/06/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024]
Abstract
Plant growth-promoting rhizobacteria, such as Bacillus spp., establish beneficial associations with plants and may inhibit the growth of phytopathogenic fungi. However, these bacteria are subject to multiple biotic stimuli from their competitors, causing stress and modifying their development. This work is a study of an in vitro interaction between two model microorganisms of socioeconomic relevance, using population dynamics and transcriptomic approaches. Co-cultures of Bacillus velezensis 83 with the phytopathogenic fungus Colletotrichum gloeosporioides 09 were performed to evaluate the metabolic response of the bacteria under conditions of non-nutritional limitation. The bacterial response was associated with the induction of a stress-resistant phenotype, characterized by a lower specific growth rate, but with antimicrobial production capacity. About 12% of co-cultured B. velezensis 83 coding sequences were differentially expressed, including the up-regulation of the general stress response (sigB regulon), and the down-regulation of alternative carbon sources catabolism (glucose preference). Defense strategies in B. velezensis are a determining factor in order to preserve the long-term viability of its population. Mostly, the presence of the fungus does not affect the expression of antibiosis genes, except for those corresponding to surfactin/bacillomycin D production. Indeed, the up-regulation of antibiosis genes expression is associated with bacterial growth, regardless of the presence of the fungus. This behavior in B. velezensis 83 resembles the strategy used by the classical Greek phalanx formation: by sacrificing growth rate and metabolic versatility, resources can be redistributed to defense (stress resistant phenotype) while maintaining the attack (antibiosis capacity). The presented results are the first characterization of the molecular phenotype at the transcriptome level of a biological control agent under biotic stress caused by a phytopathogen without nutrient limitation.
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Affiliation(s)
- Agustín Luna-Bulbarela
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad #2001, Col. Chamilpa, CP 62210 Cuernavaca, Morelos, Mexico; Agro&Biotecnia S. de R.L. de C.V., Limones 8, Amate Redondo, 62334 Cuernavaca, Morelos, Mexico
| | - María Teresa Romero-Gutiérrez
- Technological Innovation Department, Tlajomulco University Center, University of Guadalajara, 45641 Tlajomulco de Zúñiga, Jalisco, Mexico; Translational Bioengineering Department, Exact Sciences and Engineering University Center, Universidad de Guadalajara, Blvd. Marcelino García Barragán #1421, 44430 Guadalajara, Jalisco, Mexico
| | - Raunel Tinoco-Valencia
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad #2001, Col. Chamilpa, CP 62210 Cuernavaca, Morelos, Mexico
| | - Ernesto Ortiz
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad #2001, Col. Chamilpa, CP 62210 Cuernavaca, Morelos, Mexico
| | - María Esperanza Martínez-Romero
- Ecología Genómica, Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Av. Universidad s/n, Col. Chamilpa, CP 62210 Cuernavaca, Morelos, Mexico
| | - Enrique Galindo
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad #2001, Col. Chamilpa, CP 62210 Cuernavaca, Morelos, Mexico; Agro&Biotecnia S. de R.L. de C.V., Limones 8, Amate Redondo, 62334 Cuernavaca, Morelos, Mexico
| | - Leobardo Serrano-Carreón
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad #2001, Col. Chamilpa, CP 62210 Cuernavaca, Morelos, Mexico; Agro&Biotecnia S. de R.L. de C.V., Limones 8, Amate Redondo, 62334 Cuernavaca, Morelos, Mexico.
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