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Science 302 (5652): 1956-1960

Copyright © 2003 by the American Association for the Advancement of Science

A Gene Expression Map of the Arabidopsis Root

Kenneth Birnbaum,1 Dennis E. Shasha,2 Jean Y. Wang,3 Jee W. Jung,1 Georgina M. Lambert,4 David W. Galbraith,4 Philip N. Benfey3*

Abstract: A global map of gene expression within an organ can identify genes with coordinated expression in localized domains, thereby relating gene activity to cell fate and tissue specialization. Here, we present localization of expression of more than 22,000 genes in the Arabidopsis root. Gene expression was mapped to 15 different zones of the root that correspond to cell types and tissues at progressive developmental stages. Patterns of gene expression traverse traditional anatomical boundaries and show cassettes of hormonal response. Chromosomal clustering defined some coregulated genes. This expression map correlates groups of genes to specific cell fates and should serve to guide reverse genetics.

1 Department of Biology, New York University, New York, NY 10003, USA.
2 Courant Institute of Mathematical Sciences, New York University, New York, NY 10003, USA.
3 Department of Biology, Duke University, Box 91000, Durham, NC 27708, USA.
4 Department of Plant Sciences, University of Arizona, Tucson, AZ 85721, USA.

* To whom correspondence should be addressed. E-mail: philip.benfey{at}duke.edu


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Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882