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JXB Advance Access published online on May 23, 2006
Journal of Experimental Botany, doi:10.1093/jxb/erj201
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© The Author [2006]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org
Received March 3, 2006
Accepted March 23, 2006

Oxygen Metabolism ROS and Redox Signalling in Plants Special Issue

The role of reactive oxygen species in cell growth: lessons from root hairs

Rachel J. Carol 1 * and Liam Dolan 2

1 Ecole Pratique des Hautes Etudes, 46 rue de Lille, F-75007 Paris, France
2 Department of Cell and Developmental Biology, John Innes Centre, Norwich Research Park, Colney, Norwich NR4 7UH, UK

* To whom correspondence should be addressed.
Rachel J. Carol, E-mail: rachel.carol{at}ephe.sorbonne.fr


  Abstract

Reactive oxygen species (ROS) play a diversity of roles in plants. In recent years, a role for NADPH oxidase-derived ROS during cell growth and development has been discovered in a number of plant model systems. These studies indicate that ROS are required for cell expansion during the morphogenesis of organs such as roots and leaves. Furthermore, there is evidence that ROS are required for root hair growth where they control the activity of calcium channels required for polar growth. The role of ROS in the control of root hair growth is reviewed here and results are highlighted that may provide insight into the mechanism of plant cell growth in general.

Keywords: Arabidopsis; cell growth; reactive oxygen species; root hairs; tip growth.
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