Project description:This SuperSeries is composed of the following subset Series: GSE8517: Magnaporthe oryzae gene expression during biotrophic invasion of rice using version 2 of the Agilent Magnaporthe grisea Array (G4137B). GSE8518: Rice gene expression during biotrophic invasion by the rice blast fungus Magnaporthe oryzae using the Agilent Rice Array (G4138A). Keywords: SuperSeries Refer to individual Series
Project description:Analysis of transgenic rice overexpressing OsWRKY28, a WRKY type transcription factor. Results provide insight into the role of OsWRKY28 in the defense signaling against rice blast fungus. Expression profiling in wild-type and OsWRKY28 overexpressing rice leaves infected with or without Magnaporthe Oryzae was analyzed using one-color method with three biological replicates.
Project description:The rice blast disease caused by Magnaporthe oryzae (M.oryzae) is one of the most important disease in cultivated rice (Oryza sativa L.) results in extensive loss of productivity worldwide. Therefore, here we utilized the label-free quantitative proteomic approach to identify the novel M. oryzae effectors. A total of 114 were significantly modulated M. oryzae proteins derived from infected rice leaves. Among them, twenty-nine proteins were predicted as secreted proteins by SignalP 4.0. In addition, functional annotation proteins revealed that five proteins were mainly associated with hydrolase family. Consequently, five putative effector genes were cloned into a plant expression vector and fused with MYC tag in the C-terminal. Finally, we found that three in-planta M.oryzae hydrolase proteins were induced cell death after Agrobacterium tumefaciens-mediated transient expression in Nicotiana benthamiana (N.benthamiana). MGP1 (endo-1,4-beta-xylanase) and MGP4 (cellulose-binding protein) were localized in extracellular. Otherwise, MGP5 (cutinase) localized in intracellular space induced cell death. Thus, our results suggest that in-planta M. oryzae hydrolase proteins may play a key role in innate immunity via PAMP (Pathogen-Associated Molecular Pattern) in rice.
Project description:We created a mutant in the MAP kinase-encoding Pmk1 gene of the rice blast fungus Magnaporthe oryzae (pmk1AS) that renders the gene sensitive to inhibition by 1NA-PP1. Fungal gene expression was compared during infection of rice sheath by the M. oryzae pmk1AS mutant in the presence and absence of 1NA-PP1.
Project description:Analysis of transgenic rice plants overexpressing the rice WRKY transcription factor OsWRKY53 or its phospho-mimicking mutant (OsWRKY53SD). Results provide insight into the roles of OsWRKY53 and its phosphorylation in the basal defense signaling against the rice blast fungus. Expression profiling in wild-type, OsWRKY53- or its phospho-mimicking mutant-overexpressing rice leaves infected with or without Magnaporthe Oryzae was analyzed using one-color method with four biological replicates.
Project description:Mycelium from the rice blast fungus Magnaporthe oryzae was grown in both rich medium and under nutrient limiting conditions. Genes were identified that were more highly expressed in one condition as compared to the other.
Project description:Mycelium from the rice blast fungus Magnaporthe oryzae was grown in both rich medium and under nutrient limiting conditions. Genes were identified that were more highly expressed in one condition as compared to the other.
Project description:The rice blast disease, caused by Magnaporthe oryzae , devastates cultivated rice (Oryza sativa L.), resulting in extensive global crop loss. We employed a label-free quantitative proteomics approach to discover novel proteins associated with M. oryzae pathogenicity and rice defense. We identified 990 significantly modulated proteins in rice leaves including various pattern recognition receptors (PRRs) and pathogenesis-related (PR) proteins that were induced in response to M. oryzae inoculation. Additionally, 123 M. oryzae proteins were also identified and screened for their cell death-inducing activity by an in-silico approach. Among these, we found a novel protein MoXYL1 (endo-1,4-beta-xylanase) protein, which induces cell death in Nicotiana benthamiana leaves. Transgenic rice plants (PDUF26::MoXYL1) expressing MoXYL1 derived by rice domain of unknown function protein 26 (DUF26) promoter exhibited resistance against the M. oryzae and Cochliobolus miyabeanus and enhanced expression of pathogen-responsive genes and hormone-related genes. Furthermore, the application of data-independent acquisition (DIA) mass spectrometry (MS)-based proteomics on these transgenic rice plants revealed 1,833 significantly modulated proteins in response to M. oryzae, with 219 and 410 proteins responsive to MoXYL1 and M. oryzae, respectively. Based on these results, we propose a signaling network model induced by MoXYL1 and M. oryzae. In summary, our findings highlight the crucial role of MoXYL1 in rice innate immunity against M. oryzae and its potential to enhance rice disease resistance.
Project description:Magnaporthe oryzae is the causative agent of the rice blast, the most relevant rice disease worldwide. To date expression analysis on rice infected with Magnaporthe oryzae have been carried out only with the strains FR13 (leaf) and Guy 11 (root). However different strains of Magnaporthe are present in the environment leading to different rice responses at molecular level. To gain more insight on the unknown molecular mechanisms activated by different Magnaporthe strains during rice defense, a global expression analysis was performed by using the GeneChip® Rice Genome Array. To identify rice genes differentially regulated upon infection by Magnaporthe isolates, inoculation with different strains were performed and samples were collected 24 hours post infection.
Project description:We report that the homeobox trasncription factor called HOX7 controls hyphae-associated genes, autophagy and cell cycle related genes necessary for appressorium development in the rice blast fungus Magnaporthe oryzae. We also report that the ste transcription factor MST12 regulates gene functions involved in septin reorientation.
