Transcription profiling by array of Arabidopsis MKK9DD (constitutively active MKK9 kinase mutant) overexpressing seedlings and Pi-starved wild type seedlings to identify the same regulated genes
ABSTRACT: Transcription profiling by array of Arabidopsis MKK9DD (constitutively active MKK9 kinase mutant) overexpressing seedlings and Pi-starved wild type seedlings to identify the same regulated genes
Despite the abundance of phosphorus in soil, very little is available as phosphate (Pi) for plants. Plants often experience low Pi (LP) stress. Intensive studies have been conducted to reveal the mechanism used by plants to deal with LP; however, Pi sensing and signal transduction pathways are not fully understood. Using in-gel kinase assays, we determined the activities of MPK3 and MPK6 in Arabidopsis thaliana seedlings under both LP and Pi-sufficient (Murashige and Skoog, MS) conditions. Using ...[more]
Project description:Transcription profiling by array of Arabidopsis MKK9DD (constitutively active MKK9 kinase mutant) overexpressing seedlings and Pi-starved wild type seedlings to identify the same regulated genes
Project description:We were interested in investigating the transcriptome responses to exogenous applications of brassinosteroid hormone when Arabidopsis seedlings are pre-stressed with a reactive oxygen species, hydrogen peroxide. We were interested in seeing which subsets of BR-responsive gene transcripts were most affected and how BR-responsive gene transcripts responded to increasing concentrations of hydrogen peroxide both as a whole and individually. Liquid culture Arabidopsis seedlings are grown under standard conditions. Hydrogen peroxide is added at various concentrations to pre-stress the seedlings. Following this pretreatment, the seedlings are then treated with brassinosteroid (BR) hormone (epi-brassinolide, BL). Following this treatment, seedlings are harvested and total RNA is extracted for genome-wide transcriptome analysis.
Project description:The effect of a 24 hour hypoxia (0.1% O2) treatment on wild-type (Col:FRI) seedlings and vin3.4 mutant seedlings, compared to control conditions.<br>Compare wild-type control to vin3.4 control<br>Compare wild-type control to wild-type 0.1% O2<br>Compare vin3.4 control to vin3.4 0.1% O2<br>Compare wild-type 0.1% O2 to vin3.4 0.1% O2
Project description:The present study quantifies the transcriptomes of wild-type and transgenic Ubi::OsYHB rice seedlings (in the genetic background of Oryza sativa ssp. japonica CV Nipponbare) grown in the dark or under continous red light (Rc, at 50 µmol m-2 s-1) conditions. WT (Nipponbare cultivar; Nip) and Ubi::OsYHB/Nip transgenic seedlings were grown at 28°C for 5 days in darkness or under continuous red light at 50 µmol m-2 s-1 (Rc50). Seedlings were harvested in subjective morning, immediately frozen in liquid nitrogen and strored at -80°C until RNA extraction. The expression of OsYHB is driven by the maize Ubiquitin promoter. Two biological replicates for each treatment. Two independent, genetically single-insertion, homozygous Ubi::OsYHB/Nip lines (#1 and # 9, with determined 41- and 23-fold overexpression levels of OsYHB in comparison to the wild-type control, respectively) were used. GeneChip 3' IVT Express Kit (Affymetrix) was used to synthesize and label aRNA.
Project description:In order to study the Nep1 responsive genes in Arabidopsis, experiments were performed with the Affymetrix GeneChip Arabidopsis ATH1 Genome Array (Santa Clara, CA; Cat # 900385). Experiment Overall Design: Seven-day old Arabidopsis seedlings were exposed to Nep1 (10 ug/mL) treatment or using sterilized, deionized H2O as a control for 30 min. Two independent biological replications were conducted using two independent samples and two microarrays.
Project description:CHD3 proteins are ATP-dependent chromatin remodeling factors that are components of diverse multisubunit complexes that can either repress or activate gene expression. In plants, the CHD3 protein PICKLE (PKL) is necessary for repression of seed-specific genes during germination and promotes deposition of the repressive epigenetic mark trimethylation of histone H3 lysine 27 (H3K27me3). It is unknown, however, if PKL acts directly at H3K27me3-enriched loci. We undertook a microarray analysis of 14-day-old plants and found that PKL continues to play an important role in expression of H3K27me3-enriched genes and in specification of developmental identity after germination. We used microarray to identify genes that are differentialy expressed in 14-day-old pkl seedlings and used chormatin immunoprecipitation to identify genes that are the direct targets of PKL. Wild-type (Col-0) and pkl-1 seedlings were grown on 1/2 MS plates with constant light and harvsted after 14-day growth. Three biological replicates.
Project description:The aim was to identify genes associated to the down-regulation TARGET OF RAPAMYCIN (TOR) pathway in Arabidopsis. For this purpose, three independent amiR-tor lines (amiR-tor9, amiR-tor17 and amiR-tor 20) and EV lines 3 and 6 days after EST- or non-induction were used for expression profile analysis using Affymetrix microarray. Two weeks-old transgenic seedlings were transferred to MS plate with 20µM estradiol to induce the overexpression of amiR-tor (consequently, repression of AtTOR levels) under the control of an estradiol-(EST) inducible promoter. Identically treated wild-type Col-0 and pER8 empty-vector (EV) transformed seedlings were served as controls. Seedlings were harvested after 3 and 6 (amiR-tor lines) days. genetic modification