Project description:Transcriptional profiling of Arabidopsis thaliana seedlings treated with cis-cinnamic acid derivatives constructed by Nishikawa et al. (2013) Phytochemistry (http://dx.doi.org/10.1016/j.phytochem.2013.08.013), evaluating the candidate of herbicide chemicals by observing early response of gene expressions in Arabidopsis seedlings.
Project description:To understand the role of GCN2 in regulating translation, we compared the polysome loading state and overall transcript level between Arabidopsis thaliana wild type (ecotype Landsberg erecta) and gcn2 (Genetrap line GT8359, Cold Spring Harbor Laboratory) seedlings with or without herbicide chlorosufuron treatment RNA was fractionated using sucrose gradients into polysomal and nonpolysomal RNAs. We also determined overall total transcript levels. We used Affymetrix ATH1 microarrays.
Project description:Using whole genome microarray (Affymetrix ATH1) we studied the transcriptional response of Arabidopsis thaliana to triazolopyrimidine (FirstRate) herbicde that inhibits acetolactate synthase (ALS) enzyme and thus disrupts branched chain amino acid biosynthesis. A number of genes related to amino acid, protein metabolism, growth, regulatory networks, respiratory pathways, stress, defense and secondary metabolism were altered. Experiment Overall Design: Surfactant (preference 0.25%) treated plants were used as carrier control group and EC50 concentration of triazolopyrimidine was used as the herbicide treatment group. Each of the control and treatment group consisted of 3 biological replicates and each biological replicates comprised leaves from 10 individual plants. RNA was extracted at 24h post treatment to study the transcriptional alterations caused by the herbicide treatment.
Project description:Using whole genome microarray (Affymetrix ATH1) we studied the transcriptional response of Arabidopsis thaliana to primisulfuron (Beacon) herbicde that inhibits acetolactate synthase (ALS) enzyme and thus disrupts branmched chain amino acid biosynthesis. A number of genes related to amino acid, protein metabolism, growth, regulatory networks, respiratory pathways, stress, defense and secondary metabolism were altered. Experiment Overall Design: Surfectant (preference 0.25%) treated plants were used as carrier control group and EC50 concentration of primisulfuron was used as the herbicide treatment group. Each of the control and treatment group consisted of 3 biological replicates and each biological replicates comprised leaves from 10 individual plants. RNA was extracted at 24h post treatment to study the transcriptional alterations caused by the herbicide treatment.
Project description:Plants respond differently to herbicide treatments largely due to distinct modes of action of individual compounds. In this study, we performed a comparative transcriptomic analysis of Arabidopsis thaliana exposed to seven herbicides (2,4-dichlorophenoxyacetic acid, acifluorfen, atrazine, glyphosate, imazethapyr, mesotrione, and paraquat) representing seven different modes of action, employing a factorial design with two time points (4 hour and 24 hour) and two dosage levels (IC50 and IC99) at each time point. By focusing on herbicide unique differentially expressed genes under each treatment, we identified distinct transcriptional signatures comprising both mode-of-action-associated pathways and broader stress response processes. Temporal expression dynamics of these unique gene sets were resolved using k-means clustering, revealing characteristic response patterns across herbicides. Together, the differential gene sets and their associated expression patterns identify transcriptional signatures that provide a framework for herbicide mode-of-action inference, classification of novel compounds, and investigation of herbicide resistance mechanisms at the molecular level.