Project description:To analyze RACB- and Bgh (Blumeria graminis f.sp. hordei)-dependently expressed genes we used wild type and transgenic barley misexpressing the susceptibility factor RACB
Project description:Ustilago hordei is a basidiomycete fungus that infects barley and oats. It has a narrow host range and can infect only germinating seedlings. Symptoms do not occur until heading of the mature plants when the fungus has proliferated in meristematic tissue and replaces kernels with masses of black teliospores. Incompatibility is due to the presence of an avirulence effector product, UhAVR1, expressed in the fungus upon infection and secreted into the host, which is subsequently recognized by the barley plant resistance gene product RUH1 in cultivar Hannchen, leading to plant cell death, fungal growth arrest, and no disease. We have identified UhAvr1, and the transcriptome response of the barley plant to strains with and deleted for this gene was assessed using the 22K Affymetrix barley array. Incompatibility and cell death is apparent at 48 hrs after inoculation, so the transcriptome was assessed at this time point. For comparison, the transcriptome of barley cultivar Odessa, which lacks resistance gene Ruh1, during a compatible interaction was also assessed.
Project description:Transcript-Level Variation in Barley Seedling Leaves Challenged with Puccinia hordei and the Molecular Basis of Partial Resistance to Leaf Rust
Project description:Transcript-Level Variation in Barley Seedling Leaves Challenged with Puccinia hordei and the Molecular Basis of Partial Resistance to Leaf Rust
Project description:Purpose: The powdery mildew fungus, Blumeria graminis, is an obligate biotrophic pathogen of cereals and has significant impact on food security (Dean et al., 2012. Molecular Plant Pathology 13 (4): 414-430. DOI: 10.1111/j.1364-3703.2011.00783.x). Blumeria graminis f. sp. hordei (Bgh) is the causal agent of powdery mildew on barley (Hordeum vulgare L.). We sought to discover novel transcripts expressed following barley infection with blumeria.
Project description:Purpose: The powdery mildew fungus, Blumeria graminis, is an obligate biotrophic pathogen of cereals and has significant impact on food security (Dean et al., 2012). B. graminis f. sp. hordei (Bgh) is the causal agent of powdery mildew on barley (Hordeum vulgare L.). We sought to address the temporal regulation of membrane trafficking associated gene expression in barley-powdery mildew interactions. We created an isogenic panel of immune signaling mutants to address three main questions: (i) which Blumeria secreted proteins are differentially regulated in response to different compromised genotypes, (ii) which barley membrane trafficking genes are altered in response to pathogen attack, and (iii) how are these genes interacting across genotypes and infection stages.
Project description:Purpose: The powdery mildew fungus, Blumeria graminis, is an obligate biotrophic pathogen of cereals and has significant impact on food security (Dean et al., 2012. Molecular Plant Pathology 13 (4): 414-430. DOI: 10.1111/j.1364-3703.2011.00783.x). Blumeria graminis f. sp. hordei (Bgh) is the causal agent of powdery mildew on barley (Hordeum vulgare L.). We sought to identify small RNAs (sRNAs) from both barley and Bgh that regulate gene expression both within species and cross-kingdom.
