Hormonal control of the shoot stem-cell niche

Zhong Zhao, Stig U. Andersen, Karin Ljung, Karel Dolezal, Andrej Miotk, Sebastian J. Schultheiss and Jan U. Lohmann ()
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Zhong Zhao: University of Heidelberg
Stig U. Andersen: Max Planck Institute for Developmental Biology
Karin Ljung: Umeå Plant Science Centre, Swedish University of Agricultural Sciences
Karel Dolezal: Umeå Plant Science Centre, Swedish University of Agricultural Sciences
Andrej Miotk: University of Heidelberg
Sebastian J. Schultheiss: Max Planck Institute for Developmental Biology
Jan U. Lohmann: University of Heidelberg

Nature, 2010, vol. 465, issue 7301, 1089-1092

Abstract: Control of shoot stem cells Plants continuously maintain stem cells in their apical meristems from which shoot and root systems are produced. In the classic plant model Arabidopsis thaliana, stem-cell fate in the shoot apical meristem is controlled by hormones such as auxin and cytokinin. A study of the cross-talk between these hormones now shows that two A-type ARABIDOPSIS RESPONSE REGULATOR genes integrate cytokinin and auxin signals and connect these inputs with the core regulatory machinery in the shoot apical meristem. This work suggests a mechanistic framework for the synergistic activity of auxin and cytokinin in setting up the shoot stem-cell niche, and highlights differences between the responses of root and shoot stem-cell systems to phytohormones.

Date: 2010
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DOI: 10.1038/nature09126

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