Project description:The development of trichomes (leaf hairs) from pluripotent epidermal cells in Arabidopsis provides a powerful system to investigate the regulatory motifs involved in plant cell differentiation. Genetic studies have revealed that a bHLH transcription factor, GL3, activates downstream genes required for trichome initiation by interacting with a R2R3-MYB protein, GL1. We have taken advantage of several mutants in the trichome developmental pathway and gene expression analyses to identify a set of genes expressed predominantly in Arabidopsis trichomes. Experiment Overall Design: We compared the gene expression between the wild type and trichome mutant, gl3 egl3 using green tissue (not include root).
Project description:GLABRA3 (GL3) and GLABRA1 (GL1) function as selector genes that control the differentiation of a group of protodermal cells into trichomes in Arabidopsis thaliana. We performed genome-wide location (ChIP-chip) analyses by using transgenic Arabidopsis plants carrying GL3-YFP or GL1-YFP-MYC1 mini genes. These analyses identified statistically significant enriched DNA associated with GL1 and GL3. A total ~540 and ~700 genes were identified as located proximal and downstream to the GL1 and GL3 binding regions, respectively. Keywords: ChIP-chip
Project description:Transcriptional profiling of cotyledon transcriptomics at the seedling stage (6 d) by comparison of wild-type vs. cotyledon-less laterne (= pid enp) homozygous mutant. The goal was to determine the transcriptomic profile of a cotyledon. The experiment took advantage of the endogenously caused lack of cotyledons instead of dissecting these organs, which would cause wound-induced expression.This was achieved by comparing seedlings of the Arabidopsis thaliana pid enp double mutant, which is incapable to generate cotyledons. This is caused by the loss of apical cell polarisation of the auxin efflux carrier PIN1 in epidermal cells during embryogenesis.
