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A high-resolution root spatiotemporal map reveals dominant expression patterns

Item Type:Article
Title:A high-resolution root spatiotemporal map reveals dominant expression patterns
Creators Name:Brady, S.M. and Orlando, D.A. and Lee, J.Y. and Wang, J.Y. and Koch, J. and Dinneny, J.R. and Mace, D. and Ohler, U. and Benfey, P.N.
Abstract:Transcriptional programs that regulate development are exquisitely controlled in space and time. Elucidating these programs that underlie development is essential to understanding the acquisition of cell and tissue identity. We present microarray expression profiles of a high-resolution set of developmental time points within a single Arabidopsis root and a comprehensive map of nearly all root cell types. These cell type-specific transcriptional signatures often predict previously unknown cellular functions. A computational pipeline identified dominant expression patterns that demonstrate transcriptional similarity between disparate cell types. Dominant expression patterns along the root's longitudinal axis do not strictly correlate with previously defined developmental zones, and in many cases, we observed expression fluctuation along this axis. Both robust co-regulation of gene expression and potential phasing of gene expression were identified between individual roots. Methods that combine these profiles demonstrate transcriptionally rich and complex programs that define Arabidopsis root development in both space and time.
Keywords:Arabidopsis, Developmental Gene Expression Regulation, Gene Expression Profiling, Green Fluorescent Proteins, Oligonucleotide Array Sequence Analysis, Plant Gene Expression Regulation, Plant Roots
Source:Science
ISSN:0036-8075
Publisher:American Association for the Advancement of Science (U.S.A.)
Volume:318
Number:5851
Page Range:801-806
Date:2 November 2007
Official Publication:https://doi.org/10.1126/science.1146265
PubMed:View item in PubMed

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