Insights Into the Ecological Role of Pseudomonas spp. in an Ant-plant Symbiosis
| Autor: | Paulo Henrique Marques de Andrade, Carla Menegatti, Weilan G. P. Melo, Taise T H Fukuda, Camila Cristina Galvão Francisco Pereira, Paulo Teixeira Lacava, Cameron R. Currie, Milton Groppo, Mônica Tallarico Pupo |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Microbiology (medical) lcsh:QR1-502 01 natural sciences Microbiology lcsh:Microbiology 03 medical and health sciences Symbiosis Pseudomonas genome mining antimicrobial activities bacteria 030304 developmental biology 0303 health sciences biology Pantoea biology.organism_classification nitrogen fixation myrmecophytes Nitrogen fixation Methylobacterium Rhizobium SEQUENCIAMENTO GENÉTICO Proteobacteria Bacteria 010606 plant biology & botany |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Frontiers in Microbiology, Vol 12 (2021) |
| ISSN: | 1664-302X |
| DOI: | 10.3389/fmicb.2021.621274 |
| Popis: | In the myrmecophytic mutualistic relationship between Azteca ants and Cecropia plants both species receive protection and exchange nutrients. The presence of microorganisms in this symbiotic system has been reported, and the symbiotic role of some fungi involved in the myrmecophytic interactions has been described. In this work we focus on bacteria within this mutualism, conducting isolations and screening for antimicrobial activities, genome sequencing, and biochemical characterization. We show that Pantoea, Rhizobium, Methylobacterium, Streptomyces and Pseudomonas are the most common cultivable genera of bacteria. Interestingly, Pseudomonas spp. isolates showed potent activity against 83% of the pathogens tested in our antimicrobial activity assays, including a phytopathogenic fungus isolated from Cecropia samples. Given the predicted nitrogen limitations associated with the fungal patches within this myrmecophyte, we performed nitrogen fixation analyses on the bacterial isolates within the Proteobacteria and show the potential for nitrogen fixation in Pseudomonas strains. The genome of one Pseudomonas strain was sequenced and analyzed. The gene cluster involved in the biosynthesis of cyclic lipodepsipeptides (CLPs) was identified, and we found mutations that may be related to the loss of function in the dual epimerization/condensation domains. The compound was isolated, and its structure was determined, corresponding to the antifungal viscosinamide. Our findings of diazotrophy and production of viscosinamide in multiple Pseudomonas isolates suggests that this bacterial genus may play an important role in the Cecropia-Azteca symbiosis. |
| Databáze: | OpenAIRE |
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