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Plant Cell Physiol. 2006 Jun;47(6):788-92. Epub 2006 Apr 17.

Expression profiling of auxin-treated Arabidopsis roots: toward a molecular analysis of lateral root emergence.

Author information

1
Biology Department, Oberlin College, Oberlin, OH 44074, USA. mlaskows@oberlin.edu

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.

PMID:
16621846
DOI:
10.1093/pcp/pcj043
[Indexed for MEDLINE]

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