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Series GSE10497 Query DataSets for GSE10497
Status Public on Apr 24, 2008
Title Expression analysis of root developmental zones after iron deficiency (-Fe) treatment
Organism Arabidopsis thaliana
Experiment type Expression profiling by array
Summary To gain a genome-scale understanding of the role that developmental processes play in regulating stimulus response, we examined the effect of -Fe stress on gene expression along the longitudinal axis of the root. Since roots grow from stem cells located near the tip, the position of cells along the longitudinal axis can be used as a proxy for developmental time, with distance from the root tip correlating with increased differentiation. To estimate the role developmental stage plays in regulating salt response, roots were dissected into four longitudinal zones (LZ data set) after transfer to standard or -Fe media and transcriptionally profiled.
Little is known about how developmental cues affect the way cells interpret their environment. Here we characterize the transcriptional response of different cell layers and developmental stages of the Arabidopsis root to high salinity and find that transcriptional responses are highly constrained by developmental parameters. These transcriptional changes lead to the differential regulation of specific biological functions in subsets of cell-layers, several of which correspond to observable physiological changes. We show that known stress pathways primarily control semi-ubiquitous responses and use mutants that disrupt epidermal patterning to reveal cell-layer specific and inter-cell-layer effects. By performing a similar analysis using iron-deprivation we identify common cell-type specific stress responses and environment-independent biological functions that define each cell type.
Keywords: root developmental zone analysis
Overall design Roots were grown under standard conditions for 5 days then transfered to standard media or iron deficient (-Fe) conditions (0.3mM Ferrozine in MS media containing no ferrous sulfate). 24 hours after transferring seedlings, roots were cut into 4 regions using a razor blade. The first cut was made ~150 µm from the root tip at the point where the shape of the root transitions from conical to cylindrical (Zone 1). The second cut was made ~200 µm above the first cut, at the point were the root becomes less optically dense, which marks the approximate end of the meristematic zone (Zone 2). The third cut was made ~200-300 µm above the second cut, just below the region where root hairs begin to emerge (Zone 3). The fourth cut was made ~1 mm above the third cut (Zone 4).
Contributor(s) A. Long T, Wang JY, Benfey PN
Citation(s) 18436742
Submission date Feb 12, 2008
Last update date Aug 28, 2018
Contact name Terri Anita Long
Phone 919-613-8202
Fax 919-613-8177
Organization name Duke University
Department Biology
Lab Philip Benfey
Street address Box 90338
City Durham
State/province NC
ZIP/Postal code 27707
Country USA
Platforms (1)
GPL198 [ATH1-121501] Affymetrix Arabidopsis ATH1 Genome Array
Samples (16)
GSM265418 Arabidopsis, root, longitudinal zone 1, standard conditions, rep 1
GSM265419 Arabidopsis, root, longitudinal zone 1, standard conditions, rep 2
GSM265420 Arabidopsis, root, longitudinal zone 2, standard conditions, rep 1
This SubSeries is part of SuperSeries:
GSE10576 Iron deficiency (-Fe) effect: Arabidopsis roots
Affiliated with GSE69995
BioProject PRJNA108929

Download family Format
SOFT formatted family file(s) SOFTHelp
MINiML formatted family file(s) MINiMLHelp
Series Matrix File(s) TXTHelp

Supplementary file Size Download File type/resource
GSE10497_RAW.tar 55.1 Mb (http)(custom) TAR (of CEL, CHP)
Raw data provided as supplementary file
Processed data included within Sample table
Processed data provided as supplementary file

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