Project description:The Arabidopsis thaliana mutant wrky33 is highly susceptible to the necrotrophic fungus Botrytis cinerea. We identified by ChIP-seq >1680 high-confidence WRKY33 binding sites associated with 1576 genes within the Arabidopsis genome, with all of them being dependent on rapid activation of WRKY33 expression by Botrytis cinerea strain 2100. Genome-wide transcriptional analysis defined 318 genes as direct functional targets at 14 h post inoculation. Comparison between resistant wild-type Columbia-0 and susceptible wrky33 mutant plants revealed that expression of 75% of all WRKY33 regulated targets were down-regulated upon infection, indicating that WRKY33 predominately acts as a repressor. However, WRKY33 appears to possess dual functionality acting either as a repressor or as an activator in a promoter-context dependent manner. Our genome-wide analysis confirmed known WRKY33 targets involved in ethylene and jasmonic acid hormone signaling and phytoalexin biosynthesis, but also uncovered a previously unknown role of abscisic acid (ABA) biosynthesis in the complex regulatory circuitry affecting resistance towards Botrytis. Analysis of transgenic plants expressing WRKY33-HA under its native promoter post inoculation with spores of Botrytis cinerea 2100
Project description:The Arabidopsis rosette core can display full resistance against Botrytis cinerea. To reveal potential players in this resistance, the transcriptome of the Arabidopsis rosette core was determined.
Project description:af13_plp2 - plp2 botrytis cinerea 2 - Effects of deregulation of a lipid acyl hydrolase gene (PLP2, At2g26560) on global transcriptome upon infection by Botrytis cinerea. This deregulation affects resistance levels against fungal and bacterial pathogens, likely by perturbing the biosynthesis of oxylipins. Oxylipins are fatty acid-derived compounds (example:jasmonic acid) with diverse signaling or antimicrobial properties. - 5000 spores of Botrytis were pipetted on 4 infection sites per ault leaf. Leaf material was harvested at 0 and 2 days later. 3 plant genotypes were used (Col-0 ecotype): siPLP2 (RNAi-silenced),pBIN (empty pBIN-transformed),PLP2OE (PLP2-overexpressors). 4 dye-swap - CATMA arrays
Project description:af13_plp2 - plp2 botrytis cinerea 2 - Effects of deregulation of a lipid acyl hydrolase gene (PLP2, At2g26560) on global transcriptome upon infection by Botrytis cinerea. This deregulation affects resistance levels against fungal and bacterial pathogens, likely by perturbing the biosynthesis of oxylipins. Oxylipins are fatty acid-derived compounds (example:jasmonic acid) with diverse signaling or antimicrobial properties. - 5000 spores of Botrytis were pipetted on 4 infection sites per ault leaf. Leaf material was harvested at 0 and 2 days later. 3 plant genotypes were used (Col-0 ecotype): siPLP2 (RNAi-silenced),pBIN (empty pBIN-transformed),PLP2OE (PLP2-overexpressors).
2009-05-10 | GSE15972 | GEO
Project description:UV mutagenesis on Coprinopsis cinerea #326
Project description:Botrytis cinerea (gray mold) is one of the most destructive pathogens of cherry tomatoes, causing fruit decay and economic loss. Fludioxonil is an effective fungicide widely used for crop protec-tion and is essential for controlling tomato gray mold. The emergence of fungicide-resistant strains has made the control of Botrytis cinerea more difficult. While the genome of Botrytis cinerea is available, there are few reports regarding the large-scale functional annotation of the genome using expressed genes derived from transcriptomes, and the mechanism(s) underlying such flu-dioxonil resistance remain unclear. The present study prepared RNA-sequencing (RNA-seq) li-braries for three Botrytis cinerea strains [two highly resistant (LR and FR) versus one highly sen-sitive (S) to fludioxonil], with and without fludioxonil treatment, to identify fludioxonil responsive genes that facilitate fungicide resistance. Functional enrichment analysis identified nine resistant related DEGs in the fludioxonil-induced LR and FR transcriptome that were simultaneously up regulated, and seven resistant related DEGs down regulated. These included adenosine tri-phosphate (ATP)-binding cassette (ABC) transporter-encoding genes, major facilitator super-family (MFS) transporter-encoding genes, and the high-osmolarity glycerol (HOG) pathway homologues or related genes. The expression patterns of twelve out of the sixteen fludioxo-nil-responsive genes, obtained from the RNA-sequence data sets were validated using quantita-tive real-time PCR (qRT-PCR). Based on RNA-sequence analysis it was found that fugal HHKs, like BOS1, BcHHK2, and Bchhk17, were in some way involved in the fludioxonil resistance of B. cinerea, in addition, a number of ABC and MFS transporter genes that were not reported before, such as BcATRO, BMR1, BMR3, BcNMT1, BcAMF1, BcTOP1, BcVBA2, and BcYHK8 were differen-tially expressed in the fludioxonil-resistant strains, indicating that overexpression of these efflux transporters located in the plasma membranes played a crucial role in the fludioxonil resistant mechanism of B. cinerea. These lines of evidence together allowed us to draw a general portrait of the anti-fludioxonil mechanisms for Botrytis cinerea, and the assembled and annotated transcrip-tome data provide valuable genomic resources for further study of the molecular mechanisms of B. cinerea resistance to fludioxonil.
Project description:Analysis of the genome-wide DNA methylation pattern of Botrytis cinerea. Results provide new and important information that DNA methylation is critical for pathogenicity and development of Botrytis cinerea by regulating gene expression.
Project description:Analysis of the genome-wide DNA methylation pattern of Botrytis cinerea. Results provide new and important information that DNA methylation is critical for pathogenicity and development of Botrytis cinerea by regulating gene expression.
Project description:To investigate NUP62 in the regulation of plant defense against Botrytis cinerea , we performed gene expression profiling analysis using data obtained from RNA-seq of nup62 mutant and WT arabidopsis with or without Botrytis cinerea infection.