Time-course RNA-seq analysis of the barley MLA1 immune receptor-mediated response to barley powdery mildew fungus Bgh in Arabidopsis thaliana
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ABSTRACT:
ORGANISM(S): Arabidopsis thaliana
PROVIDER: GSE39463 | GEO | 2012/11/22
SECONDARY ACCESSION(S): PRJNA171012
REPOSITORIES: GEO
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Project description:We report that an intracellular NLR immune receptor from monocotyledonous barley is fully functional in dicotyledonous Arabidopsis thaliana. In contrast to common belief in plant NLR biology, this implies ~150 million years of evolutionary conservation of the underlying immune mechanism. This also suggests a conserved translocation mechanism for pathogen effectors in flowering plants. The deduced connectivity of the NLR to bifurcated signaling pathways likely confers increased robustness against pathogen interception, which could have contributed to the evolutionary preservation of the immune mechanism. RNA-seq experiments in Arabidopsis detected sustained expression of a single major MLA1-dependent gene cluster. 3 biological replicates per condition. The Arabidopsis plants without (pps) or with (B12) the MLA1-HA construct in a pen2 pad4 sag101 background were challenged with either the Bgh isolate K1 expressing the cognate AVRA1 effector for MLA1 or the Bgh isolate A6 expressing other AVRA effectors. Samples were collected at 6, 12, 18, 24 hours post inoculation (hpi) of Bgh.
2012-11-22 | E-GEOD-39463 | biostudies-arrayexpress
Project description:Disease resistance (R) genes encoding intracellular nucleotide-binding domain and Leucine-rich repeat proteins (NLRs) are key components of the plant innate immune system and typically detect the presence of isolate-specific avirulence (AVR) effectors from pathogens. NLRs define the fastest evolving gene family of flowering plants and are often arranged in gene clusters containing multiple paralogs, contributing to extensive copy number and allele-specific NLR variation within a host species. Barley mildew resistance gene locus A (MLA) represents one of only few R genes that have been subject to extreme functional diversification, resulting in allelic resistance specificities each recognizing a cognate but largely unidentified AVRA gene of the powdery mildew fungus, Blumeria graminis f sp hordei (Bgh). We performed RNA-sequencing of Bgh-infected barley leaves at two different time-points to obtain transcriptome data for 16 Bgh isolates, containing different AVRA genes. Subsequently, we analyzed the expression levels in the different isolates with a specific focus on previously described candidate secreted effectors (CSEPs) and additionally performed a transcriptome-wide association analysis including these 16 isolates and the previously published reference isolate DH14. These analyses identified AVRA1 and AVRA13, encoding two CSEPs that are recognized by MLA1 and MLA13 alleles, respectively. The avirulence function of both candidates could be verified by transient expression of the effector genes in barley leaves or protoplasts that was sufficient to trigger an MLA1 or MLA13 allele-specific cell death response. AVRA1 recognition by MLA1 is also retained in transgenic Arabidopsis lines.
2016-10-05 | GSE83237 | GEO
Project description:A large-scale parallel expression analysis was conducted to elucidate Mla-specified responses to powdery mildew infection using 22K Barley1 GeneChip probe arrays. Our goal was to identify genes differentially expressed in incompatible (resistant) vs. compatible (susceptible) and Mla-specified Rar1-dependent vs. -independent interactions. A split-split-plot design with 108 experimental units (3 replications x 2 isolates x 3 genotypes x 6 time points) was used to profile near-isogenic lines containing the Mla1, Mla6, and Mla13 resistance specificities in response to inoculation with the Blumeria graminis f. sp. hordei (Bgh) isolates 5874 (AvrMla1, AvrMla6) and K1 (AvrMla1, AvrMla13). ****[PLEXdb(http://www.plexdb.org) has submitted this series at GEO on behalf of the original contributor, Rico Caldo. The equivalent experiment is BB4 at PLEXdb.] genotype: CI 16137 (Mla1) - pathogen isolates: Bgh 5874 - time: 0 hai(3-replications); genotype: CI 16137 (Mla1) - pathogen isolates: Bgh 5874 - time: 8 hai(3-replications); genotype: CI 16137 (Mla1) - pathogen isolates: Bgh 5874 - time: 16 hai(3-replications); genotype: CI 16137 (Mla1) - pathogen isolates: Bgh 5874 - time: 20 hai(3-replications); genotype: CI 16137 (Mla1) - pathogen isolates: Bgh 5874 - time: 24 hai(3-replications); genotype: CI 16137 (Mla1) - pathogen isolates: Bgh 5874 - time: 32 hai(3-replications); genotype: CI 16137 (Mla1) - pathogen isolates: Bgh K1 - time: 0 hai(3-replications); genotype: CI 16137 (Mla1) - pathogen isolates: Bgh K1 - time: 8 hai(3-replications); genotype: CI 16137 (Mla1) - pathogen isolates: Bgh K1 - time: 16 hai(3-replications); genotype: CI 16137 (Mla1) - pathogen isolates: Bgh K1 - time: 20 hai(3-replications); genotype: CI 16137 (Mla1) - pathogen isolates: Bgh K1 - time: 24 hai(3-replications); genotype: CI 16137 (Mla1) - pathogen isolates: Bgh K1 - time: 32 hai(3-replications); genotype: CI 16151 (Mla6) - pathogen isolates: Bgh 5874 - time: 0 hai(3-replications); genotype: CI 16151 (Mla6) - pathogen isolates: Bgh 5874 - time: 8 hai(3-replications); genotype: CI 16151 (Mla6) - pathogen isolates: Bgh 5874 - time: 16 hai(3-replications); genotype: CI 16151 (Mla6) - pathogen isolates: Bgh 5874 - time: 20 hai(3-replications); genotype: CI 16151 (Mla6) - pathogen isolates: Bgh 5874 - time: 24 hai(3-replications); genotype: CI 16151 (Mla6) - pathogen isolates: Bgh 5874 - time: 32 hai(3-replications); genotype: CI 16151 (Mla6) - pathogen isolates: Bgh K1 - time: 0 hai(3-replications); genotype: CI 16151 (Mla6) - pathogen isolates: Bgh K1 - time: 8 hai(3-replications); genotype: CI 16151 (Mla6) - pathogen isolates: Bgh K1 - time: 16 hai(3-replications); genotype: CI 16151 (Mla6) - pathogen isolates: Bgh K1 - time: 20 hai(3-replications); genotype: CI 16151 (Mla6) - pathogen isolates: Bgh K1 - time: 24 hai(3-replications); genotype: CI 16151 (Mla6) - pathogen isolates: Bgh K1 - time: 32 hai(3-replications); genotype: CI 16155 (Mla13) - pathogen isolates: Bgh 5874 - time: 0 hai(3-replications); genotype: CI 16155 (Mla13) - pathogen isolates: Bgh 5874 - time: 8 hai(3-replications); genotype: CI 16155 (Mla13) - pathogen isolates: Bgh 5874 - time: 16 hai(3-replications); genotype: CI 16155 (Mla13) - pathogen isolates: Bgh 5874 - time: 20 hai(3-replications); genotype: CI 16155 (Mla13) - pathogen isolates: Bgh 5874 - time: 24 hai(3-replications); genotype: CI 16155 (Mla13) - pathogen isolates: Bgh 5874 - time: 32 hai(3-replications); genotype: CI 16155 (Mla13) - pathogen isolates: Bgh K1 - time: 0 hai(3-replications); genotype: CI 16155 (Mla13) - pathogen isolates: Bgh K1 - time: 8 hai(3-replications); genotype: CI 16155 (Mla13) - pathogen isolates: Bgh K1 - time: 16 hai(3-replications); genotype: CI 16155 (Mla13) - pathogen isolates: Bgh K1 - time: 20 hai(3-replications); genotype: CI 16155 (Mla13) - pathogen isolates: Bgh K1 - time: 24 hai(3-replications); genotype: CI 16155 (Mla13) - pathogen isolates: Bgh K1 - time: 32 hai(3-replications)
2011-11-22 | E-GEOD-33396 | biostudies-arrayexpress
Project description:RNA-seq experiments in Arabidopsis detected MLA1-dependent gene regulation which does not require defence phytohormones signalling.
2017-12-11 | GSE80423 | GEO
Project description:RNA-seq experiments detected fungal expression patterns during infection of immunocompromised Arabidopsis thaliana 3 biological replicates per condition. Arabidopsis plants without (pps) or with (B12) the MLA1-HA construct in pen2 pad4 sag101 background were challenged with either Bgh isolate K1 expressing the cognate AVRA1 effector for MLA1 or Bgh isolate A6 expressing other AVRA effectors. Samples were collected at 6, 12, 18, 24 hours post inoculation (hpi) of Bgh.
2013-05-27 | E-GEOD-43163 | biostudies-arrayexpress
Project description:Expression analysis was performed on total RNA from the Q21861 and SM89010 barley lines, and 75 derived doubled haploid progeny, with CI 16137 included as an internal Mla1 allele control. Samples were blocked by time-point and completely randomized within each block. For each sample, seven day old seedlings were inoculated with Blumeria graminis f. sp. hordei (Bgh) isolate 5874 (AVRa1, AVRa6, AVRa12), and first leaves were collected at 16 and 32 hours after inoculation (HAI). ****[PLEXdb(http://www.plexdb.org) has submitted this series at GEO on behalf of the original contributor, Roger Wise. The equivalent experiment is BB96 at PLEXdb.]
2016-10-04 | GSE68963 | GEO
Project description:Disease resistance is mediated by specific recognition of pathogen avriulence effectors (AVR) by nucleotide-binding leucine-rich repeat (NLR) receptors. The barley (Hordeum vulgare) mildew locus A (mla) resistance gene homolog 1 (RGH1) encoded NLRs (MLAs) confer isolate-specific resistance to the widespread mildew fungus Blumeria graminis forma specialis hordei (Bgh). In barley, MLA has been subject to extensive functional diversification, resulting in allelic resistance specificities, each recognizing a cognate Bgh AVRa. The by genetic association isolated AVRa1 and AVRa13 effectors belong to the candidate secreted effector protein (CSEP) gene family (Lu et al., 2016). To unravel the complex mechanisms underlying MLA functional diversification in barley and wheat, isolation of numerous Bgh AVRa genes and recognition of their gene products by MLA is necessary. Our here deployed higher resolution genetic association approach identified the Bgh avirulence gene candidate loci AVRa7, AVRa9, AVRa22 and AVRa10 by associating of transcript polymorphisms and AVRa phenotypes from a collection of 27 Bgh isolates. We collected 10 Bgh isolates from a local Bgh population in Cologne in addition to our previous collection of 17 Bgh isolates (Lu et al., 2016).
2019-02-19 | GSE110266 | GEO
Project description:A parallel expression profiling of wild-type and loss-of-function mutants of Mla6 and Mla1 powdery mildew resistance alleles was conducted using Barley1 GeneChip. Barley plants were inoculated with powdery mildew isolate 5874 and first leaves were harvested at 6 time points after pathogen inoculation. This experiment was conducted in split-split-plot experimental design with 3 replications.
2008-11-19 | E-TABM-142 | biostudies-arrayexpress
Project description:A split-split-plot design with 144 experimental units (3 replications x 4 genotypes x 6 time points x 2 treatment types) was used to profile barley plants containing variants of Mla1 and Mla6 powdery mildew resistance genes in response to inoculation with the Blumeria graminis f. sp. hordei (Bgh) isolates 5874 (AvrMla1, AvrMla6). Barley leaves were harvested from inoculated and non-inoculated plants at 6 time points (0,8,16,20,24 and 32 hrs) after Bgh inoculation. ****[PLEXdb(http://www.plexdb.org) has submitted this series at GEO on behalf of the original contributor, Rico Caldo. The equivalent experiment is BB10 at PLEXdb.] genotype: Mla1 - time: 0 - Treated or untreated: Inoculated (3-replications); genotype: Mla1 - time: 0 - Treated or untreated: Non-inoculated(3-replications); genotype: Mla1 - time: 8 - Treated or untreated: Inoculated (3-replications); genotype: Mla1 - time: 8 - Treated or untreated: Non-inoculated(3-replications); genotype: Mla1 - time: 16 - Treated or untreated: Inoculated (3-replications); genotype: Mla1 - time: 16 - Treated or untreated: Non-inoculated(3-replications); genotype: Mla1 - time: 20 - Treated or untreated: Inoculated (3-replications); genotype: Mla1 - time: 20 - Treated or untreated: Non-inoculated(3-replications); genotype: Mla1 - time: 24 - Treated or untreated: Inoculated (3-replications); genotype: Mla1 - time: 24 - Treated or untreated: Non-inoculated(3-replications); genotype: Mla1 - time: 32 - Treated or untreated: Inoculated (3-replications); genotype: Mla1 - time: 32 - Treated or untreated: Non-inoculated(3-replications); genotype: m508 - time: 0 - Treated or untreated: Inoculated (3-replications); genotype: m508 - time: 0 - Treated or untreated: Non-inoculated(3-replications); genotype: m508 - time: 8 - Treated or untreated: Inoculated (3-replications); genotype: m508 - time: 8 - Treated or untreated: Non-inoculated(3-replications); genotype: m508 - time: 16 - Treated or untreated: Inoculated (3-replications); genotype: m508 - time: 16 - Treated or untreated: Non-inoculated(3-replications); genotype: m508 - time: 20 - Treated or untreated: Inoculated (3-replications); genotype: m508 - time: 20 - Treated or untreated: Non-inoculated(3-replications); genotype: m508 - time: 24 - Treated or untreated: Inoculated (3-replications); genotype: m508 - time: 24 - Treated or untreated: Non-inoculated(3-replications); genotype: m508 - time: 32 - Treated or untreated: Inoculated (3-replications); genotype: m508 - time: 32 - Treated or untreated: Non-inoculated(3-replications); genotype: Mla6 - time: 0 - Treated or untreated: Inoculated (3-replications); genotype: Mla6 - time: 0 - Treated or untreated: Non-inoculated(3-replications); genotype: Mla6 - time: 8 - Treated or untreated: Inoculated (3-replications); genotype: Mla6 - time: 8 - Treated or untreated: Non-inoculated(3-replications); genotype: Mla6 - time: 16 - Treated or untreated: Inoculated (3-replications); genotype: Mla6 - time: 16 - Treated or untreated: Non-inoculated(3-replications); genotype: Mla6 - time: 20 - Treated or untreated: Inoculated (3-replications); genotype: Mla6 - time: 20 - Treated or untreated: Non-inoculated(3-replications); genotype: Mla6 - time: 24 - Treated or untreated: Inoculated (3-replications); genotype: Mla6 - time: 24 - Treated or untreated: Non-inoculated(3-replications); genotype: Mla6 - time: 32 - Treated or untreated: Inoculated (3-replications); genotype: Mla6 - time: 32 - Treated or untreated: Non-inoculated(3-replications); genotype: 9472 - time: 0 - Treated or untreated: Inoculated (3-replications); genotype: 9472 - time: 0 - Treated or untreated: Non-inoculated(3-replications); genotype: 9472 - time: 8 - Treated or untreated: Inoculated (3-replications); genotype: 9472 - time: 8 - Treated or untreated: Non-inoculated(3-replications); genotype: 9472 - time: 16 - Treated or untreated: Inoculated (3-replications); genotype: 9472 - time: 16 - Treated or untreated: Non-inoculated(3-replications); genotype: 9472 - time: 20 - Treated or untreated: Inoculated (3-replications); genotype: 9472 - time: 20 - Treated or untreated: Non-inoculated(3-replications); genotype: 9472 - time: 24 - Treated or untreated: Inoculated (3-replications); genotype: 9472 - time: 24 - Treated or untreated: Non-inoculated(3-replications); genotype: 9472 - time: 32 - Treated or untreated: Inoculated (3-replications); genotype: 9472 - time: 32 - Treated or untreated: Non-inoculated(3-replications)
2011-11-22 | E-GEOD-33392 | biostudies-arrayexpress
Project description:A large-scale parallel expression analysis was conducted to elucidate Mla-specified responses to powdery mildew infection using 22K Barley1 GeneChip probe arrays. Our goal was to identify genes differentially expressed in incompatible (resistant) vs. compatible (susceptible) and Mla-specified Rar1-dependent vs. -independent interactions. A split-split-plot design with 108 experimental units (3 replications x 2 isolates x 3 genotypes x 6 time points) was used to profile near-isogenic lines containing the Mla1, Mla6, and Mla13 resistance specificities in response to inoculation with the Blumeria graminis f. sp. hordei (Bgh) isolates 5874 (AvrMla1, AvrMla6) and K1 (AvrMla1, AvrMla13).
2004-09-01 | E-MEXP-142 | biostudies-arrayexpress