scholarly journals Lipid metabolism in arbuscular mycorrhizal roots of Medicago truncatula

2005 ◽  
Vol 66 (7) ◽  
pp. 781-791 ◽  
Author(s):  
Michael Stumpe ◽  
Jan-Gerrit Carsjens ◽  
Irene Stenzel ◽  
Cornelia Göbel ◽  
Imke Lang ◽  
...  
Keyword(s):  
Lipid Metabolism ◽  
Medicago Truncatula ◽  
Arbuscular Mycorrhizal ◽  
Mycorrhizal Roots

scholarly journals Nodule Inception Is Not Required for Arbuscular Mycorrhizal Colonization of Medicago truncatula

Plants ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 71
Author(s):  
Anil Kumar ◽  
Donna R. Cousins ◽  
Cheng-Wu Liu ◽  
Ping Xu ◽  
Jeremy D. Murray
Keyword(s):  
Arbuscular Mycorrhiza ◽  
Medicago Truncatula ◽  
Time Course ◽  
Phylogenetic Analyses ◽  
Arbuscular Mycorrhizal ◽  
Land Plants ◽  
Altered Expression ◽  
Mycorrhiza Formation ◽  
Mycorrhizal Roots ◽  
Time Course Study

Most legumes can engage in symbiosis with N-fixing bacteria called rhizobia. This symbiosis, called nodulation, evolved from the more widespread symbiosis that most land plants form with arbuscular mycorrhiza, which is reflected in a common requirement of certain genes for both these symbioses. One key nodulation gene, Nodule Inception (NIN), has been intensively studied. Mutants in NIN are unable to form nodules, which has made it difficult to identify downstream genes under the control of NIN. The analysis of data from our recent transcriptomics study revealed that some genes with an altered expression of nin during nodulation are upregulated in mycorrhizal roots. In addition, another study reported the decreased colonization of nin roots by arbuscular mycorrhiza. We therefore investigated a role for NIN in mycorrhiza formation. Our time course study, using two nin alleles with differing genetic backgrounds, suggests that that loss of NIN does not affect colonization of Medicago truncatula roots, either in the presence or absence of rhizobia. This, and recent phylogenetic analyses showing that the loss of NIN is correlated with loss of nodulation in the FaFaCuRo clade, but not with the ability to form mycorrhiza, argue against NIN being required for arbuscular mycorrhization in legumes.

scholarly journals Cloning and Characterization of Two Phosphate Transporters from Medicago truncatula Roots: Regulation in Response to Phosphate and to Colonization by Arbuscular Mycorrhizal (AM) Fungi

1998 ◽  
Vol 11 (1) ◽  
pp. 14-22 ◽  
Author(s):  
Henry Liu ◽  
Anthony T. Trieu ◽  
Laura A. Blaylock ◽  
Maria J. Harrison
Keyword(s):  
Medicago Truncatula ◽  
Expression Patterns ◽  
Arbuscular Mycorrhizal ◽  
Phosphate Starvation ◽  
Purple Acid Phosphatase ◽  
Cdna Clones ◽  
Phosphate Transporters ◽  
Transcript Levels ◽  
Mycorrhizal Roots ◽  
Am Fungus

Most vascular plants can acquire phosphate from the environment either directly, via the roots, or indirectly, via a fungal symbiont that invades the cortical cells of the root. Here we have identified two cDNA clones (MtPT1 and MtPT2) encoding phosphate transporters from a mycorrhizal root cDNA library (Medicago truncatula/Glomus versiforme). The cDNAs represent M. truncatula genes and the encoded proteins share identity with high-affinity phosphate transporters from Arabidopsis, potato, yeast, Neurospora crassa, and an arbuscular mycorrhizal (AM) fungus, G. versiforme. The function of the protein encoded by MtPT1 was confirmed by complementation of a yeast phosphate transport mutant (pho84). The Km of the MtPT1 transporter in this system is 192 μM. MtPT1 and MtPT2 transcripts are present in roots and transcript levels increase in response to phosphate starvation. MtPT transcripts were not detected in leaves. Following colonization of the roots by the AM fungus G. versiforme, both MtPT1 and MtPT2 transcript levels decrease significantly. Down-regulation of phosphate starvation-inducible genes in mycorrhizal roots appears to be a common occurrence and a homologue of a phosphate starvation-inducible purple acid phosphatase is also down-regulated in the mycorrhizal roots. The functional characteristics and expression patterns of the MtPT transporters are consistent with a role in the acquisition of phosphate from the environment but suggest that they may not be involved in phosphate uptake at the symbiotic interface in mycorrhizal roots.

scholarly journals Organization and Metabolism of Plastids and Mitochondria in Arbuscular Mycorrhizal Roots of Medicago truncatula

2005 ◽  
Vol 139 (1) ◽  
pp. 329-340 ◽  
Author(s):  
Swanhild Lohse ◽  
Willibald Schliemann ◽  
Christian Ammer ◽  
Joachim Kopka ◽  
Dieter Strack ◽  
...  
Keyword(s):  
Medicago Truncatula ◽  
Arbuscular Mycorrhizal ◽  
Mycorrhizal Roots

Stimulation of carotenoid metabolism in arbuscular mycorrhizal roots

Planta ◽  
2002 ◽  
Vol 216 (1) ◽  
pp. 148-154 ◽  
Author(s):  
Thomas Fester ◽  
Diana Schmidt ◽  
Swanhild Lohse ◽  
Michael Walter ◽  
Giovanni Giuliano ◽  
...  
Keyword(s):  
Arbuscular Mycorrhizal ◽  
Carotenoid Metabolism ◽  
Mycorrhizal Roots ◽  
Stimulation Of

The Observation of Arbuscular Mycorrhizal Roots in Horticultural Plants

Mycobiology ◽  
2000 ◽  
Vol 28 (3) ◽  
pp. 115-1118 ◽  
Author(s):  
Yee Kim ◽  
Ahn-Heum Eom ◽  
Moon-Sung Tae ◽  
Sang-Sun Lee
Keyword(s):  
Arbuscular Mycorrhizal ◽  
Mycorrhizal Roots ◽  
Horticultural Plants

scholarly journals LeGOO: An Expertized Knowledge Database for the Model Legume Medicago truncatula

2019 ◽  
Vol 61 (1) ◽  
pp. 203-211 ◽  
Author(s):  
S�bastien Carr�re ◽  
Marion Verdenaud ◽  
Clare Gough ◽  
J�r�me Gouzy ◽  
Pascal Gamas
Keyword(s):  
Medicago Truncatula ◽  
Reverse Genetics ◽  
Arbuscular Mycorrhizal ◽  
Biological Information ◽  
Model Species ◽  
Model Legume ◽  
Wide Range ◽  
Legume Symbiosis ◽  
Symbiotic Nodule ◽  
Set Up

Abstract Medicago truncatula was proposed, about three decades ago, as a model legume to study the Rhizobium-legume symbiosis. It has now been adopted to study a wide range of biological questions, including various developmental processes (in particular root, symbiotic nodule and seed development), symbiotic (nitrogen-fixing and arbuscular mycorrhizal endosymbioses) and pathogenic interactions, as well as responses to abiotic stress. With a number of tools and resources set up in M. truncatula for omics, genetics and reverse genetics approaches, massive amounts of data have been produced, as well as four genome sequence releases. Many of these data were generated with heterogeneous tools, notably for transcriptomics studies, and are consequently difficult to integrate. This issue is addressed by the LeGOO (for Legume Graph-Oriented Organizer) knowledge base (https://www.legoo.org), which finds the correspondence between the multiple identifiers of the same gene. Furthermore, an important goal of LeGOO is to collect and represent biological information from peer-reviewed publications, whatever the technical approaches used to obtain this information. The information is modeled in a graph-oriented database, which enables flexible representation, with currently over 200,000 relations retrieved from 298 publications. LeGOO also provides the user with mining tools, including links to the Mt5.0 genome browser and associated information (on gene functional annotation, expression, methylome, natural diversity and available insertion mutants), as well as tools to navigate through different model species. LeGOO is, therefore, an innovative database that will be useful to the Medicago and legume community to better exploit the wealth of data produced on this model species.

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