Expression Profiling of Auxin-treated Arabidopsis Roots: Toward a Molecular Analysis of Lateral Root Emergence

Abstract

Treating Arabidopsis roots with exogenous auxin results in dramatic changes in cellular processes including de novo induction of lateral roots which later emerge through the overlying cells. Microarray experiments reveal approximately 80 genes that are substantially up-regulated in the root over the first 12 h following auxin treatment. We hypothesize that the observed increase in expression of pectate lyase family genes leads to degradation of the pectin-rich middle lamellae, allowing cells in the parent root to separate cleanly. Differences in the degree of pectin methylation in lateral and parent roots may explain why lateral roots are not degraded themselves.

Publisher

Oxford University Press

Publication Date

6-1-2006

Publication Title

Plant and Cell Physiology

Department

Biology

Document Type

Article

DOI

https://dx.doi.org/10.1093/pcp/pcj043

Keywords

Arabidopsis thaliana, Auxin, Cell separation, Lateral root, Microarray, Pectate lyase

Language

English

Format

text

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