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Abstract

A major feature of embryogenesis is the specification of stem cell systems, but in contrast to the situation in most animals, plant stem cells remain quiescent until the postembryonic phase of development. Here, we dissect how light and metabolic signals are integrated to overcome stem cell dormancy at the shoot apical meristem. We show on the one hand that light is able to activate expression of the stem cell inducer WUSCHEL independently of photosynthesis and that this likely involves inter-regional cytokinin signaling. Metabolic signals, on the other hand, are transduced to the meristem through activation of the TARGET OF RAPAMYCIN (TOR) kinase. Surprisingly, TOR is also required for light signal dependent stem cell activation. Thus, the TOR kinase acts as a central integrator of light and metabolic signals and a key regulator of stem cell activation at the shoot apex.

Published in

eLife
2016, volume: 5, article number: e17023
Publisher: ELIFE SCIENCES PUBLICATIONS LTD

SLU Authors

  • Schmid, Markus

    • Max Planck Institute for Developmental Biology
    • Umeå University

UKÄ Subject classification

Cell Biology

Publication identifier

  • DOI: https://doi.org/10.7554/eLife.17023

Permanent link to this page (URI)

https://res.slu.se/id/publ/127177