ArticleMicrobial ecology2022
The Bradyrhizobium Sp. LmicA16 Type VI Secretion System Is Required for Efficient Nodulation of Lupinus Spp.
Article in Microbial ecology, 2022. 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.
- Review
- Comparative Genomic Analysis of the Type VI Secretion System in Strains of the Rhizobium leguminosarum Species Complex with Variable Host Specificity.Current microbiology · 2026Article
- Evolutionary mechanisms underlying bacterial adaptation to the plant environment.FEMS microbiology reviews · 2026Review
- Cyclic di-GMP Modulation of Quorum Sensing and Its Impact on Type VI Secretion System Function inMicroorganisms · 2025Article
- The Type VI Secretion System of Sinorhizobium fredii USDA257 Is Required for Successful Nodulation With Glycine max cv Pekin.Microbial biotechnology · 2025Article
- Article
- Correlating phylogenetic and functional diversity of the nod-free but nodulating Bradyrhizobium phylogroup.The ISME journal · 2025Article
- Pangenome analysis indicates evolutionary origins and genetic diversity: emphasis on the role of nodulation in symbioticFrontiers in plant science · 2025Article
- CopGBiology · 2024Article
- The role of the type VI secretion system in the stress resistance of plant-associated bacteria.Stress biology · 2024Review
- The T6SS-Dependent Effector Re78 ofBiology · 2023Article
- The Rhizobial Type 3 Secretion System: The Dr. Jekyll and Mr. Hyde in the Rhizobium-Legume Symbiosis.International journal of molecular sciences · 2022Review
- Varietas Delectat: Exploring Natural Variations in Nitrogen-Fixing Symbiosis Research.Frontiers in plant science · 2022Review
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Authors and funding
8 authors.
Funding
Abstract
Many bacteria of the genus Bradyrhizobium are capable of inducing nodules in legumes. In this work, the importance of a type VI secretion system (T6SS) in a symbiotic strain of the genus Bradyrhizobium is described. T6SS of Bradyrhizobium sp. LmicA16 (A16) is necessary for efficient nodulation with Lupinus micranthus and Lupinus angustifolius. A mutant in the gene vgrG, coding for a component of the T6SS nanostructure, induced less nodules and smaller plants than the wild-type (wt) strain and was less competitive when co-inoculated with the wt strain. A16 T6SS genes are organized in a 26-kb DNA region in two divergent gene clusters of nine genes each. One of these genes codes for a protein (Tsb1) of unknown function but containing a methyltransferase domain. A tsb1 mutant showed an intermediate symbiotic phenotype regarding vgrG mutant and higher mucoidity than the wt strain in free-living conditions. T6SS promoter fusions to the lacZ reporter indicate expression in nodules but not in free-living cells grown in different media and conditions. The analysis of nodule structure revealed that the level of nodule colonization was significantly reduced in the mutants with respect to the wt strain.
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