Long- and short-distance signaling in the regulation of lateral plant growth
Version of Record online: 16 OCT 2013
© 2013 The Authors. Physiologia Plantarum published by John Wiley & Sons Ltd on behalf of Scandinavian Plant Physiology Society.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Special Issue: Plant Vascular Biology
Volume 151, Issue 2, pages 134–141, June 2014
How to Cite
Brackmann, K. and Greb, T. (2014), Long- and short-distance signaling in the regulation of lateral plant growth. Physiologia Plantarum, 151: 134–141. doi: 10.1111/ppl.12103
- Issue online: 14 MAY 2014
- Version of Record online: 16 OCT 2013
- Accepted manuscript online: 14 SEP 2013 12:59PM EST
- Manuscript Accepted: 19 AUG 2013
- Manuscript Received: 18 JUL 2013
- Austrian Science Fund (FWF). Grant Number: P23781-B16
Lateral growth of shoot and root axes by the formation of secondary vascular tissues is an instructive example for the plasticity of plant growth processes. Being purely postembryonic, lateral growth strongly depends on environmental input and is tightly regulated by long- and short-distance signaling. In general, plant vasculature represents the main route for long-distance transport of compounds throughout the plant body, thereby providing also a fast and efficient signaling pipeline for the coordination of growth and development. The vasculature consists of three major tissues; the xylem conducts water and nutrients, the phloem transports mainly organic compounds and the vascular cambium is a group of undifferentiated stem cells responsible for the continuous production of secondary vascular tissues. Notably, the close proximity to functional vascular tissues makes the vascular cambium especially accessible for the regulation by long-distance-derived signaling molecules as well as by the physical and physiological properties of transport streams. Thus, the vascular cambium offers unique opportunities for studying the complex regulation of plant growth processes. In this review, we focus on recent findings about long- and short-distance signaling mechanisms regulating cambium activity and, thereby, lateral expansion of plant growth axes by the formation of additional vascular tissues.