Abstract

Vascular tissue in plants is unique due to its diverse and dynamic cellular patterns. Signals controlling vascular development have only recently started to emerge through biochemical, genetic, and genomic approaches in several organisms, such as Arabidopsis, Populus, and Zinnia. These signals include hormones (auxin, brassinosteroids, and cytokinins, in particular), other small regulatory molecules, their transporters, receptors, and various transcriptional regulators. In recent years it has become apparent that plant growth regulators rarely act alone, but rather their signaling pathways are interlocked in complex networks; for example, polar auxin transport (PAT) regulates vascular development during various stages and an emerging theme is its modulation by other growth regulators, depending on the developmental context. Also, several synergistic or antagonistic interactions between various growth regulators have been described. Furthermore, shoot-root interactions appear to be important for this signal integration.

Keywords

Vascular meristem; HD-ZIPIII genes; Auxin; Cytokinin

Published in

Plant Molecular Biology
2009, Volume: 69, number: 4, pages: 347-360

SLU Authors

• Helariutta, Yrjö

  • Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences
    
  • University of Helsinki

UKÄ Subject classification

Forest Science


Publication Identifiers

DOI: https://doi.org/10.1007/s11103-008-9374-9

Permanent link to this page (URI)

https://res.slu.se/id/publ/28522