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Whole genome expression profiling of rice leaves treated with Xanthomonas oryzae pv. oryzae secreted cell wall degrading lipase/esteraseA (LipA) at early time points, 30 min. and 120 min.

ABSTRACT: Treatment of rice tissues with purified preparations of a Xanthomonas oryzae pv. oryzae (Xoo) secreted plant cell wall degrading enzyme, Lipase/Esterase (LipA), elicits cell wall damage induced innate immune responses. LipA activity is required for induction of defense responses. In order to characterize the early events during elaboration of cell wall degrading enzyme, Lipase/Esterase (LipA) induced innate immune response in rice, we have performed global gene expression profiling of rice leaves treated with purified LipA at early time points, 30 minutes and 120min, after treatment. Whole genome transcriptional profiling was performed using Affymetrix Rice GeneChips

ORGANISM(S): Oryza sativa

PROVIDER: GSE53940 | GEO | 2015/06/30

SECONDARY ACCESSION(S): PRJNA234000

REPOSITORIES: GEO

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Whole genome expression profiling of rice leaves treated with Xanthomonas oryzae pv. oryzae secreted cell wall degrading lipase/esteraseA (LipA) at early time points, 30 min. and 120 min.

Project description:Treatment of rice tissues with purified preparations of a Xanthomonas oryzae pv. oryzae (Xoo) secreted plant cell wall degrading enzyme, Lipase/Esterase (LipA), elicits cell wall damage induced innate immune responses. LipA activity is required for induction of defense responses. In order to characterize the early events during elaboration of cell wall degrading enzyme, Lipase/Esterase (LipA) induced innate immune response in rice, we have performed global gene expression profiling of rice leaves treated with purified LipA at early time points, 30 minutes and 120min, after treatment. Whole genome transcriptional profiling was performed using Affymetrix Rice GeneChips Leaves of two weeks old green house grown susceptible rice cultivar (Taichung Native-1; TN-1) were infiltrated with either 30-40μl of purified Xoo Lipase/Esterase (LipA)(500μg/ml) or with buffer (10mM potassium phosphate buffer pH 6.0) alone (as described in Jha et al. 2007; MPMI vol 20, pp 31-40). The plants were shifted to a growth chamber (28oC; 80% relative humidity; 12/12h light/dark cycle) 48 hours before the treatment. 20-30 leaf pieces covering the infiltrated zone from each of the treatments were harvested 30 min. and 120 min. after infiltration. Total RNA isolated from the pooled samples was subjected for expression analysis using Affymetrix GeneChip System. The experiment was repeated with three different biological replicates using RNA isolated from three batches of rice leaves treated with the freshly purified Xoo Lipase/Esterase (LipA)and the buffer Gene Expression profiling of rice leaves undergoing an innate immune respone induced by LipA (Lipase/Esterase A) enzyme

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Gene Expression profiling of rice leaves undergoing an innate immune response induced by XOO secreted cell wall degrading enzyme LipA (Lipase/Esterase A)

Project description:The plant cell wall degrading enzyme LipA (Lipase/Esterase A) is a Type II secretion system secreted protein of Xanthomonas oryzae pv. oryzae (Xoo; the casual of bacterial leaf blight of rice). LipA is an Xoo virulence factor. However, LipA is a double edged sword for Xoo as it induces rice defense responses such as programmed cell death/hypersensitive response like reaction (HR) and callose deposition. Prior treatment with LipA enhances resistance against subseqent Xoo infection. In order to understand the molecular events associated with Esterase (LipA) induced innate immune responsein rice , whole genome transcriptional profiling was performed using Affymetrix Rice GeneChips

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Project description:Gene Expression profiling of rice leaves undergoing an innate immune response induced by XOO secreted cell wall degrading enzyme LipA (Lipase/Esterase A)

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Project description:Whole genome expression profiling of rice leaves treated with Xanthomonas oryzae pv. oryzae secreted cell wall degrading lipase/esteraseA (LipA) at early time points, 30 min. and 120 min.

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Data-independent acquisition (DIA)-MS analysis for identification of Magnaporthe oryzae secreted protein induces cell death and triggers defense responses in rice

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.

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Transcriptome Profiling of Xanthomonas oryzae pv. oryzae and Xanthomonas oryzae pv. oryzicola on two different medias

Project description:Xanthomonas oryzae pv. oryzae (Xoo) and X. oryzae pv. oryzicola (Xoc) are important bacterial pathogens of the worldwide staple and grass model, rice. Xoo invades rice vascular tissue to cause bacterial leaf blight, a serious disease of rice throughout the world. Xoc colonizes the parenchyma tissue to cause bacterial leaf steak, a disease of emerging importance. We have designed oligonucleotide probes (50-70-mers) represented 2,858 Xoo genes and 1,816 Xoc genes annotated by The Institute for Genomic Research (TIGR). To validate the Xo arrays, self-hybridization samples and tests of the non-specific hybridization using randomly spotted oligonucleotides corresponding to the hygromycin phosphotransferase gene (hph), and blank spot and of the correlation coefficient between biological replicates as well as between duplicate spots revealed that the data generated from our oligo array were highly reliable and consistent. To demonstrate application of Xo array, we performed expression profiling experiments on arrays hybridized with RNA of Xoo and Xoc grown in the two different nutrient-condition media. Several sets of genes involved in bacterial movement, chemotaxis, and hrp genes differentially express in response to different treatment. Due to comprehensive views of microarray study, extended biological events of plant-bacteria interaction was described. This publicly available microarray for Xanthomonas oryzae (Xo) is an enabling resource for a large and international community of scientists to better understand not only Xo biology but also many other Xanthomonas species that cause significant losses on crops. Keywords: Media condition response

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