Project description:Red light can affect a variety of responses in Arabidopsis. We characterize the early gene expression patterns of seedlings exposed to 1 hour of red light using a small sized sample of 5, 7-day-old seedlings and also performed dark controls. Methods that were developed for tissue extraction and labeling for microarrays were tested using these samples Keywords: 1 time point
Project description:Red light can affect a variety of responses in Arabidopsis. We characterize the early gene expression patterns of seedlings exposed to 1 hour of red light using a small sized sample of 5, 7-day-old seedlings and also performed dark controls. Methods that were developed for tissue extraction and labeling for microarrays were tested using these samples Experiment Overall Design: Only 5, 7 day-old dark-grown Arabidopsis seedlings were treated as described and harvested for RNA extraction and hybridization on Affymetrix microarrays. We pooled samples from one Petri plate with MS medium 2% sucrose. Treatment was 1 hour of red light 630 nm (max) and dark controls
Project description:We report the mRNA profiles of the Arabidopsis thaliana seedlings germinated for 7days in the dark, then treated with light for 0h, 1h, 2h, 4h, 8h and 12h.
Project description:Etiolated seedling response to one hour of continuous red light. Four-day-old dark-grown wild-type RLD and phyA101, phyB1 and phyAphyB mutant seedlings were transferred to Rc (680 nm, 8 mol m-2 s-1) for 1 h or retained in darkness as controls. Three different biological replicates of each treatment were grown separately and extracted, processed, and analyzed independently.RNA was extracted and subjected to expression analysis by using the Affymetrix ATH1 microarray containing approximately 22,000 Arabidopsis genes .
Project description:Transcriptome analysis was conducted on fourteen-day-old Col-0 Arabidopsis seedlings 1h after treatment with 100 µM cellooligosaccharides, 100 µM cellobiose and control solution. Arabidopsis seedlings were grown on 1/2 MS solid medium in a controlled growth cabinet with a photoperiod of 8 h light (100 µmol photons m-2 s-1) / 16 h darkness, constant temperature of 22 °C. Transcriptome data show that cellooligosaccharides trigger plant immune system
Project description:The mRNA expression profiles of the WT and b''ab''b were analyzed in 1 hour 8 μmol/m2s red-light exposure and darkness after 4-day dark-grown. The gene expression changes was analyzed and compared between dark and red-light treated samples.
Project description:Transcript profiling analysis of csn3-1, csn4-1 and csn5 (csn5a-2 csn5b) light grown and dark grown mutant seedlings compared to light grown and dark grown wild type using Arabidopsis ATH1 GeneChip array Experiment Overall Design: We compare eight samples of 7 day-old light grown or dark grown csn3-1, csn4-1, and csn5 (csn5a-2 csn5b) mutant seedlings and light grown and dark grown wild type seedlings (3 independent biological replicates each).
Project description:Transcriptional profiling of 16-day-old seedlings of Arabidopsis wild type control and mutants is performed using AligentM-bM-^@M-^Ys Whole Arabidopsis Gene Expression Microarray (4x44K). Two-condition experiment, seedlings of wild type control vs. Mutant sdg25, sdg26, sdg25 sdg26, atx1, sdg26 atx1, clf, sdg26 clf, ldl1 ldl2, sdg25 ldl1 ldl2 or sdg26 ldl1 ldl2. Three biological replicates: 3 control, 3 each of the ten mutants, independently grown under 12h light/ 12h dark photoperiods and harvested.
Project description:Light initiates the seedling deetiolation transition by promoting major changes in gene expression mainly regulated by phytochrome (phy) photoreceptors. During the initial dark-to-light transition, phy photoactivation induces rapid changes in gene expression that eventually lead to the photomorphogenic development. Recent reports indicate that this process is achieved by phy-induced degradation of Phy-Interacting bHLH transcription Factors (PIFs) PIF1, PIF3 PIF4 and PIF5, which are partly redundant constitutive repressors of photomorphogenesis that accumulate in darkness. In order to test whether light/phy-regulated gene expression occurs through these PIFs, we have performed whole-genome expression analysis in the pif1pif3pif4pif5 quadruple mutant (pifq). Wild-type and pifq mutant seeds were plated on GM medium without sucrose at room temperature. During this procedure the seeds were routinely exposed to white light (WL) for a total of 1.5 hours after imbibition. Seeds were then stratified for 5 days at 4ºC in darkness, induced to germinate with a 5-min red pulse (Rp) (46 μmol/m2/s) and then incubated in the dark for 3h at 21°C before exposure to a terminal 5-min far red pulse (FRp) (58 μmol/m2/s) to suppress pseudo-dark effects. Seeds were then placed in either dark (D) or constant red light (Rc) (6.7 μmol/ m2/s) at 21°C for 45h (2d-old seedlings). Alternatively, 2d-old dark-grown seedlings were treated with 1h of red light (R1) (7.5 μmol/m2/s). Seed samples were harvested after stratification (5d stratified seeds).
