Oscillating gene expression determines competence for periodic Arabidopsis root branching.

Journal Article (Academic article)

Plants and animals produce modular developmental units in a periodic fashion. In plants, lateral roots form as repeating units along the root primary axis; however, the developmental mechanism regulating this process is unknown. We found that cyclic expression pulses of a reporter gene mark the position of future lateral roots by establishing prebranch sites and that prebranch site production and root bending are periodic. Microarray and promoter-luciferase studies revealed two sets of genes oscillating in opposite phases at the root tip. Genetic studies show that some oscillating transcriptional regulators are required for periodicity in one or both developmental processes. This molecular mechanism has characteristics that resemble molecular clock-driven activities in animal species.

Full Text

Duke Authors

Cited Authors

  • Moreno Risueno, MA; Van Norman, JM; Moreno, A; Zhang, J; Ahnert, SE; Benfey, PN

Published Date

  • September 2010

Published In

Volume / Issue

  • 329 / 5997

Start / End Page

  • 1306 - 1311

PubMed ID

  • 20829477

Pubmed Central ID

  • PMC2976612

International Standard Serial Number (ISSN)

  • 1095-9203

Digital Object Identifier (DOI)

  • 10.1126/science.1191937


  • English