ArticleMycorrhiza2017
Pseudomonas fluorescens C7R12 type III secretion system impacts mycorrhization of Medicago truncatula and associated microbial communities.
Article in Mycorrhiza, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 34 citations in OpenAlex.
- Type III secretion system diversity in the Pseudomonas fluorescens species complex.The New phytologist · 2026Article
- Article
- Secretory molecules from secretion systems fine-tune the host-beneficial bacteria (PGPRs) interaction.Frontiers in microbiology · 2024Review
- Testing plant growth promoting microorganisms in the field - a proposal for standards.Frontiers in plant science · 2023Review
- Bridging the Gap: Type III Secretion Systems in Plant-Beneficial Bacteria.Microorganisms · 2022Article
- Potential Effects of Microplastic on Arbuscular Mycorrhizal Fungi.Frontiers in plant science · 2021Article
- Characterization of the SPI-1 Type III Secretion System inFrontiers in microbiology · 2021Article
- Genetic factors involved in rhizosphere colonization by phytobeneficialComputational and structural biotechnology journal · 2020Review
- Impact of Bacterial Siderophores on Iron Status and Ionome in Pea.Frontiers in plant science · 2020Article
- Unusual extracellular appendages deployed by the model strain Pseudomonas fluorescens C7R12.PloS one · 2019Article
- Type III Secretion System of Beneficial RhizobacteriaFrontiers in microbiology · 2019Article
- Transition of Ethiopian highland forests to agriculture-dominated landscapes shifts the soil microbial community composition.BMC ecology · 2018Article
- The Ecological Role of Type Three Secretion Systems in the Interaction of Bacteria with Fungi in Soil and Related Habitats Is Diverse and Context-Dependent.Frontiers in microbiology · 2017Review
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Authors and funding
7 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Type three secretion systems (T3SSs) mediate cell-to-cell interactions between Gram-negative bacteria and eukaryotes. We hypothesized that fluorescent pseudomonads harboring T3SS (T3SS+) would be beneficial to arbuscular mycorrhizal symbiosis because non-pathogenic fluorescent pseudomonads have been previously shown to be much more abundant in mycorrhizal than in non-mycorrhizal roots. We tested this hypothesis by comparing mycorrhization and the associated rhizosphere microbial communities of Medicago truncatula grown in a non-sterile soil inoculated with either the T3SS+ mycorrhiza helper bacterium Pseudomonas fluorescens (C7R12) or a T3SS- mutant of the strain. Results showed that the bacterial secretion system was responsible for the promotion of mycorrhization because root colonization by arbuscular mycorrhizal fungi was not promoted by the T3SS- mutant. The observed T3SS-mediated promotion of mycorrhization was associated with changes in the rhizosphere bacterial communities and the increased occurrence of Claroidoglomeraceae within the intraradical arbuscular mycorrhizal fungi. Furthermore, both pseudomonad strains promoted the host-free growth of a model arbuscular mycorrhizal fungus in vitro, suggesting that T3SS-mediated promotion of mycorrhization occurs during plant-fungal interactions rather than during the pre-symbiotic phase of fungal growth. Taken together, these data provide evidence for the involvement of T3SS in promoting arbuscular mycorrhization by a model fluorescent pseudomonad and suggest the implication of interactions between the bacterium and mycorrhizas.
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