Plant Molecular Biology

, 69:347 | Cite as

Hormone interactions during vascular development



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.


Vascular meristem HD-ZIPIII genes Auxin Cytokinin 



We thank Anthony Bishopp for critical reading of the manuscript. JD is supported by the European Molecular Biology Organisation (EMBO, ALTF 450-2007).


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© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Plant Molecular Biology Laboratory, Department of Biological and Environmental Sciences, Institute of BiotechnologyUniversity of HelsinkiHelsinkiFinland
  2. 2.Department of Forest Genetics and Plant Physiology, Umeå Plant Science CenterSwedish University of Agricultural SciencesUmeaSweden

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