, Volume 18, Issue 7, pp 717–720 | Cite as

Initiation und Etablierung von Keimblättern im Arabidopsis-Embryo

  • Michaela Matthes
  • Ramon A. Torres-Ruiz
Wissenschaft Keimblattorganogenese bei Pflanzen


Cotyledons are specialised embryonic leaves whose initiation starts when the activities of the Ser/Thr-kinase PID and the NPH3-like protein ENP polarise the auxin transporter PIN1 in epidermal cells of the Arabidopsis embryo apex. The resulting directional auxin flux generates two opposing cell groups with high concentrations of the hormone auxin. These auxin maxima are essential for initiation and maintenance of cotyledons. We describe the interplay of factors participating in this process.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Lehrstuhl für GenetikTU MünchenMünchenGermany
  2. 2.Lehrstuhl für GenetikTechnische Universität MünchenFreisingGermany

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