ArticlePlant physiology2004
Plant and bacterial symbiotic mutants define three transcriptionally distinct stages in the development of the Medicago truncatula/Sinorhizobium meliloti symbiosis.
Article in Plant physiology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers.
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46 citing papers in PubMed.
- SydR, a redox-sensing MarR-type regulator ofmBio · 2024Article
- Defense and senescence interplay in legume nodules.Plant communications · 2024Review
- Responses of mature symbiotic nodules to the whole-plant systemic nitrogen signaling.Journal of experimental botany · 2020Article
- The Nodule-Specific PLAT Domain Protein NPD1 Is Required for Nitrogen-Fixing Symbiosis.Plant physiology · 2019Article
- MostmSphere · 2018Article
- Disease Resistance Mechanisms in Plants.Genes · 2018Review
- Impact of salicylic acid- and jasmonic acid-regulated defences on root colonization by Trichoderma harzianum T-78.Plant signaling & behavior · 2017Article
- Examination of Endogenous Peptides in Medicago truncatula Using Mass Spectrometry Imaging.Journal of proteome research · 2016Article
- A Laser Dissection-RNAseq Analysis Highlights the Activation of Cytokinin Pathways by Nod Factors in the Medicago truncatula Root Epidermis.Plant physiology · 2016Article
- Article
- Loss of the nodule-specific cysteine rich peptide, NCR169, abolishes symbiotic nitrogen fixation in the Medicago truncatula dnf7 mutant.Proceedings of the National Academy of Sciences of the United States of America · 2015Article
- De novo transcriptome analysis of Medicago falcata reveals novel insights about the mechanisms underlying abiotic stress-responsive pathway.BMC genomics · 2015Article
- Multiple steps control immunity during the intracellular accommodation of rhizobia.Journal of experimental botany · 2015Article
- Does plant immunity play a critical role during initiation of the legume-rhizobium symbiosis?Frontiers in plant science · 2015Review
- System approaches to study root hairs as a single cell plant model: current status and future perspectives.Frontiers in plant science · 2015Review
- Multifaceted investigation of metabolites during nitrogen fixation in Medicago via high resolution MALDI-MS imaging and ESI-MS.Journal of the American Society for Mass Spectrometry · 2015Article
- Article
- The identification of novel loci required for appropriate nodule development in Medicago truncatula.BMC plant biology · 2013Article
- Article
- Insights into post-transcriptional regulation during legume-rhizobia symbiosis.Plant signaling & behavior · 2013Article
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2 authors.
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Abstract
In the Medicago truncatula/Sinorhizobium meliloti symbiosis, the plant undergoes a series of developmental changes simultaneously, creating a root nodule and allowing bacterial entry and differentiation. Our studies of plant genes reveal novel transcriptional regulation during the establishment of the symbiosis and identify molecular markers that distinguish classes of plant and bacterial symbiotic mutants. We have identified three symbiotically regulated plant genes encoding a beta,1-3 endoglucanase (MtBGLU1), a lectin (MtLEC4), and a cysteine-containing protein (MtN31). MtBGLU1 is down-regulated in the plant 24 h after exposure to the bacterial signal, Nod factor. The non-nodulating plant mutant dmi1 is defective in the ability to down-regulate MtBGLU1. MtLEC4 and MtN31 are induced 1 and 2 weeks after bacterial inoculation, respectively. We examined the regulation of these two genes and three previously identified genes (MtCAM1, ENOD2, and MtLB1) in plant symbiotic mutants and wild-type plants inoculated with bacterial symbiotic mutants. Plant (bit1, rit1, and Mtsym1) and bacterial (exoA and exoH) mutants with defects in the initial stages of invasion are unable to induce MtLEC4, MtN31, MtCAM1, ENOD2, and MtLB1. Bacterial mutants (fixJ and nifD) and a subset of plant mutants (dnf2, dnf3, dnf4, dnf6, and dnf7) defective for nitrogen fixation induce the above genes. The bacA bacterial mutant, which senesces upon deposition into plant cells, and two plant mutants with defects in nitrogen fixation (dnf1 and dnf5) induce MtLEC4 and ENOD2 but not MtN31, MtCAM1, or MtLB1. These data suggest the presence of at least three transcriptionally distinct developmental stages during invasion of M. truncatula by S. meliloti.
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