Potyvirus effect-Transcriptionnal response to potyviruses infection in Arabidopsis
ABSTRACT: ra06-05_potyvirus-ecotypes - potyvirus effect - Common and specific genes deregulated in response to various potyviruses in different Arabidopsis genetic backgrounds. - Arabidopsis thaliana ecotype Ler was inoculated with three different Potyviruses. About 4 weeks after sowing, the 6 expanded leaves plants were inoculated with the different viruses or were mock-inoculated. Seven days after inoculation, inoculated leaves were collected, RNA was extracted and virus infection controlled. Three biological repeats have been done and two dye-swaps. Keywords: normal vs disease comparison 6 dye-swap - CATMA arrays
Project description:ra06-05_potyvirus-ecotypes - arabidopsis ecotypes - Common and specific genes deregulated in response to various potyviruses in different Arabidopsis genetic backgrounds. - Four different Arabidopsis ecotypes were inoculated with one Potyviruse. About 4 weeks after sowing, the 6 expanded leaves plants were inoculated with the different viruses or were mock-inoculated. Seven days after inoculation, inoculated leaves were collected, RNA was extracted and virus infection controlled. RNA fron infected plants was then used for microarrays hybridization. Three biological repeat have been done and two dye-swap. Keywords: normal vs disease comparison 6 dye-swap - CATMA arrays
Project description:In an effort to begin to delineate the bicarbonate regulon, we used microarray analysis with cells grown to late exponential growth phase (3 hr) and then submitted to a 15 min exposure with 0.1 M NaHCO3. Our goal was to define the first set of genes affected by the presence of bicarbonate.
Project description:Investigation of differentially expressed genes in human HCT116 cells after knockdown of FBXO28 for 16h and 36h. FBXO28 knockdown and control HCT116 cells. 4 replicates per time point (16h, 36h), including dye swaps.
Project description:Identification of the régulation pathways implied in adventitious root formation control in Arabidopsis etiolated seedlings. 2 mutants : a null allele and a weak allele of the ARGONAUTE gene. 4 repetitions in 2 pools for each sample.
Project description:The objective of the study was to identify the genes up and down-regulated during the interaction of P. brassicae with a partial resistant genotype of Arabidopsis. The transcriptome pattern of inoculated and non-inoculated plants of Arabidopsis was compared at three time points after inoculation (24 hours, 48 hours and one-week ai).<br> Sixty plants were studied by comparison (inoculated-non inoculated) and by kinetic point. RNAs of the 30 inoculated plants and the RNAs of the 30 non-inoculated plants were pooled to eliminate variability between individual plants and thus to target for genes for which differences in expression were linked to the inoculation by the pathogen. Five comparisons have been performed: inoculated-non inoculated at 24 hours ai; inoculated-non inoculated 48 hours ai; inoculated-non inoculated one-week ai; inoculated 24h ai-inoculated 48h ai; inoculated 48h ai- inoculated one-week ai. The entire experiment was repeated (biological repetition) and each comparison was performed in two independent hybridisations (technical repetition).
Project description:Identification of Hox gene downstream genes at embryonic stages 11 and 12<br><br>Functional diversification of body parts is dependent on the formation of specialized structures along the various body axes. In animals, region-specific morphogenesis along the anterior-posterior axis is controlled by a group of conserved transcription factors encoded by the Hox genes. Although it has long been assumed that Hox proteins carry out their function by regulating distinct sets of downstream genes, only a small number of such genes have been found, with very few having direct roles in controlling cellular behavior. We have quantitatively identified hundreds of Hox downstream genes in Drosophila by microarray analysis, and validated many of them by in situ hybridizations on loss- and gain-of-function mutants. One important finding is that Hox proteins, despite their similar DNA binding properties in vitro, have highly specific effects on the transcriptome in vivo, as expression of many downstream genes responds primarily to a single Hox protein. In addition, a large fraction of downstream genes encodes realizator functions, which directly affect morphogenetic processes, such as orientation and rate of cell divisions, cell-cell adhesion and communication, cell shape and migration, or cell death. Focusing on these realizators, we provide a framework for the morphogenesis of the maxillary segment. Since the genomic organization of Hox genes and the interaction of Hox proteins with specific cofactors are conserved in vertebrates and invertebrates, and similar classes of downstream genes are regulated by Hox proteins across the metazoan phylogeny, our findings represent a first step towards a mechanistic understanding of morphological diversification within a species as well as between species.
Project description:A large-scale time course expression profiling of wild type (Mla12/Rar1/Rom1) and mutants (mla12-M66, M82 (rar1-1), M100 (rar1-2) and rom1) of barley cultivar Sultan 5 was conducted to understand the molecular mechanisms of delayed powdery mildew resistance. Barley plants were inoculated with powdery mildew pathogen isolate 5874. First leaves of inoculated and non-inoculated plants were harvested at six time points after pathogen inoculation. The experiment was laid out in split-split-plot design with 180 experimental units (3 replications x 2 treatments (inoculated and non-inoculated) x 5 genotypes x 6 time points).