Unknown,Transcriptomics,Genomics,Proteomics

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Maize gene expression during infection with Ustilago maydis strains SG200Dpit1 and SG200Dpit2


ABSTRACT: Ustilago maydis is a basidiomycete fungus that causes smut disease in maize. Most prominent symptoms of the disease are plant tumors, which can be induced by U. maydis on all aerial parts of the plant. We identified two linked genes, pit1 and pit2, which are specifically expressed during plant colonization. Deletion mutants for either pit1 or pit2 are unable to induce tumor development and elicit plant defense responses. We used the Affymetrix maize genome array to analyze the transcriptional responses of maize to deletion pit1 and pit2 mutants and found plant responses to both mutants being not significantly distinguishable. U. maydis infected parts of maize seedling leaves were dissected 4 days after inoculation with strain SG200Dpit1 and SG200Dpit2, respectively. We previously submitted data of maize leaves that were treated with the progenitor wild type strain SG200 as well as mock-infections under identical experimetal conditions (GEO: GSE10023, 4d mock and 4d SG200 Samples, equivalent record in Arrayexpress: E-GEOD-10023). These data served as controls for this experiment.

ORGANISM(S): Zea mays

SUBMITTER: Gunther Doehlemann 

PROVIDER: E-GEOD-28479 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Two linked genes encoding a secreted effector and a membrane protein are essential for Ustilago maydis-induced tumour formation.

Doehlemann Gunther G   Reissmann Stefanie S   Assmann Daniela D   Fleckenstein Martin M   Kahmann Regine R  

Molecular microbiology 20110622 3


Ustilago maydis is a biotrophic fungal pathogen that colonizes living tissue of its host plant maize. Based on transcriptional upregulation during biotrophic development we identified the pit (proteins important for tumours) cluster, a novel gene cluster comprising four genes of which two are predicted to encode secreted effectors. Disruption of the gene cluster abolishes U. maydis-induced tumour formation and this phenotype can be caused by deleting either pit1 encoding a transmembrane protein  ...[more]

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