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Gene expression in wheat heads treated with the mutant tri6Δ of Fusarium graminearum, which produces a priming-induced resistance to fusarium head blight

ABSTRACT: Fusarium head blight (FHB) is a major disease of cereal crops caused by the fungus Fusarium graminearum (Fg). FHB affects the flowering heads (or spikes) and developing seeds. This study compares the gene expression profile of heads from the susceptible cultivar Roblin after inoculation with either water (W) or the disarmed Fg strain tri6Δ (T6). Tri6 is a global transcription regulator affecting the trichothecene biosynthesis pathway.

ORGANISM(S): Triticum aestivum

PROVIDER: GSE69437 | GEO | 2015/06/02

SECONDARY ACCESSION(S): PRJNA285493

REPOSITORIES: GEO

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Gene expression during early infection of the susceptible spring wheat cultivar Roblin with Fusarium graminearum, the major causal agent of fusarium head blight in wheat

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Gene expression in near isogenic spring wheat lines carrying different combinaison of the FHB resistance QTLs 2DL, 3BS and 5A during early infection with Fusarium graminearum, the major causal agent of fusarium head blight in wheat

Project description:Fusarium head blight (FHB) is a major disease of cereal crops caused by the fungus Fusarium graminearum (Fg). FHB affects the flowering heads (or spikes). This study compare the gene expression profile in wheat spikelets from near isogenic spring wheat lines carrying different combinaison of the FHB resistance QTLs 2DL, 3BS and 5A, after inoculation with water (H2O) or Fg; the point inoculation method was used.

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Gene expression in wheat heads treated with the mutant noxABΔ of Fusarium graminearum, which produces a priming-induced resistance to fusarium head blight

Project description:Fusarium head blight (FHB) is a major disease of cereal crops caused by the fungus Fusarium graminearum (Fg). FHB affects the flowering heads (or spikes) and developing seeds. This study compares the gene expression profile of heads from the susceptible cultivar Roblin after inoculation with either water (dH2O) or the disarmed Fg strain noxABΔ (NoxAB). noxABΔ is a double deletion mutant of NoxA and NoxB, which function are component of the NADPH oxidase enzyme complex converting molecular oxygen in a stepwise reduction to superoxides leading to the production of H2O2. Deletion mutants of Nos A and B have been described in more details in Li Wang, Christopher Mogg, Sean Walkowiak, Manisha Joshi & Rajagopal Subramaniam (2014). Characterization of NADPH oxidase genes NoxA and NoxB in Fusarium graminearum. Can. J. Plant Pathol. 36: 12-21, DOI: 10.1080/07060661.2013.868370. This manuscript characterizes the role of the catalytic subunit (gp91phox) of Nox, NoxA and NoxB in F. graminearum. Targeted deletion of NoxA and NoxB show that these genes differentially regulate the production of superoxides during mycelia development. The nitro blue tetrazolium staining revealed that both the single noxA mutant and the double noxA/B mutant strains are restricted in the production of superoxides. This limitation, however, did not affect their ability to synthesize 15-ADON in culture. Deletion analyses also revealed that NoxA, but not NoxB is involved in perithecia development and ascospore production. An in-vitro based cellophane breach assay indicated that both NoxA and NoxB contribute to virulence. The pathogenicity tests performed on a susceptible variety of wheat, ‘Roblin’ confirmed that these two genes act synergistically to promote virulence. Cumulatively, we provide evidence that the Nox homologues have non-redundant functions in F. graminearum.

2015-06-02 | GSE69490 | GEO

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RNA profiling of Fusarium head blight-resistant wheat addition lines containing the Thinopyrum elongatum chromosome 7E

Project description:Fusarium head blight (FHB) is a major disease of cereal crops caused by the fungus Fusarium graminearum (Fg). FHB affecting the flowering heads (or spikes). A FHB resistance locus has been identified on the chromosome 7E of the wild wheat relative Thinopyrum elongatum (Th.e.). That chromosome (7E) or a long arm fragment of it (7EL) have been transferred as additions in the wheat background 'Chinese Spring' (CS). The two addition lines are resistant to FHB while 'Chinese Spring' is moderately susceptible to it. The mechanism of resistance is not known. The analysis of this work is published in the Canadian Journal of Plant Pathology (Wang et al, 2010). We used the wheat microarray to determine the global expression profil in inoculated spikelets of the addition and parental lines, after water or Fg treatment, with samplings at 2 and 4 days after inoculation (DAI).

2010-06-23 | E-GEOD-21386 | biostudies-arrayexpress

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