Project description:rs06-01_pld - pld - Role of PLDzeta to abiotic stress adaptation - A double mutant PLDzeta1,2 was obtained in a Columbia background. 12-day-old Arabidopsis seedlings, wt or double mutant, were treated with either NaCl (200 mM), mannitol (400 mM) or with 4degreeC temperature during 3 h. 3 biological replicates were pooled. Keywords: gene knock out,treated vs untreated comparison
Project description:Global gene expression data from 7-day old light-grown liquid cultured seedlings treated with or without auxin (5�M IAA) for 2 h. Columbia (WT), IAA17 loss of function mutant allele (iaa17-2), IAA17 gain of function mutant allele (axr3-1) and iaa5 iaa6 iaa19 triple loss of function mutant allele (i5i6i19) were used for this study. Each experimental condition has three true replicates for a total of 24 hybridizations. Data Keywords: parallel sample
Project description:Relative expression data from germinating seeds of Columbia (wt), the pkl mutant (pkl), Columbia plus uniconazole-P (Uwt) and the pkl-mutant plus uniconazole-P (Upkl).
Project description:Identification of new and unpredicted full length Arabidopsis genes. Examination of cRNA prepared from Arabidopsis thaliana ecotype Columbia light grown 7-day old seedlings using whole genome tiling arrays. Keywords: other
Project description:Relative expression data from germinating seeds of Columbia (wt), the pkl mutant (pkl), Columbia plus uniconazole-P (Uwt) and the pkl-mutant plus uniconazole-P (Upkl). Each experimental condition (wt, pkl, Uwt and Upkl) has four true replicates for a total of 16 chips. Keywords = CHD3 Keywords = chromatin remodeling factors Keywords = developmental transition Keywords = embryo Keywords = seed germination Keywords: other
Project description:We sequenced the poly(A)+ and poly(A)- samples of the roots and shoots from 10-day-old WT seedlings grown under P+ and P- condition. The WT plant refers to Columbia ecotype Arabidopsis seedlings. Each condition has two replicates. After total RNA extraction, ribosomal RNAs were removed using RiboMinus™ Plant Kit repeated two times. The poly(A)+ and poly(A)- constituent were separated with oligo(dT) magnetic beads (Oligotex mRNA Mini Kit, QIAGEN). Using a 2-fold change and a P-value <0.05 as the cut-off for selecting the differentially expressed transcripts, we globally identified novel noncoding lncRNAs.
Project description:Reactive oxygen species such as hydrogen peroxide (H2O2) are important in biotic and abiotic stress responses in plants, but their source is often unclear. We have identified an Arabidopsis mutant that shows loss of stress responsive GSTF8 gene expression in response to the plant defence signal salicylic acid (SA) . The mutant showed increased susceptibility to both fungal and bacterial pathogens. The dsr1 mutation was mapped to mitochondrial succinate dehydrogenase (SDH1-1) and dsr1 had reduced SDH activity and a lowered mitochondrial H2O2 production. To better understand the loss of SA-response in dsr1, we performed ATH1 microarray analysis in WT and dsr1 10 hours after a 1 mM SA treatment, a point at which we observed maximal SA-induced GSTF8 promoter activity. 4 day old WT (a Columbia line containing a -800GSTF8::LUC reporter) and dsr1 seedlings (a mutant Columbia line containing a -800GSTF8::LUC) reporterwere treated with water (mock) or 1 mM SA for 40 min. Ten hours after treatment, samples were collected.
Project description:Plants respond to changes in the red:far red ratio (R:FR) of incident light. A reduction in this ratio (increase in FR) results in the Shade Avoidance Response (SAR) with associated changes in gene expression. The Phyotchrome-Interacting Factors (PIFs) are bHLH transcription factors known to be involved in the SAR. An analysis of changes in gene expression in WT and quadruple pif1pif3pif4pif5 (pifq; Leivar et al., 2008 (PMID 19920208)) mutant seedlings in response to an increase in FR should identify primary targets of PIF signaling. We used microarrays to examine the SAR in WT (Columbia) and pifq mutant Arabidopsis seedlings. Arabidopsis WT 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, and then grown in WL (19 umol/m2/s, R/FR ratio of 6.48) for 2 days at 21°C (WL0 samples). Two-day-old WL-grown seedlings were then maintained in the same fluence rate of WL supplemented with far-red light (WL-FR, R/FR ratio of 0.006) for 1 (FR1), 3 (FR3) or 24 (FR24) hours before harvesting. Control seedlings were also maintained in parallel in the same fluence rate of WL for 24h (WL24) before harvesting. Three different biological replicates of each treatment were grown separately and extracted, processed, and analyzed independently.
Project description:Dark grown Arabidopsis seedlings (Columbia gl1) were grown in the dark at 23°C for 4 days before adding 90 mM sucrose for 6h. Keywords: Response to nutrients; sugar sensing