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Shoot meristem maintenance is controlled by a GRAS-gene mediated signal from differentiating cells

By Jeroen Stuurman, Fabienne Jäggi and Cris Kuhlemeier


Plant shoot development depends on the perpetuation of a group of undifferentiated cells in the shoot apical meristem (SAM). In the Petunia mutant hairy meristem (ham), shoot meristems differentiate postembryonically as continuations of the subtending stem. HAM encodes a putative transcription factor of the GRAS family, which acts non-cell-autonomously from L3-derived tissue of lateral organ primordia and stem provasculature. HAM acts in parallel with TERMINATOR (PhWUSCHEL) and is required for continued cellular response to TERMINATOR and SHOOTMERISTEMLESS (PhSTM). This reveals a novel mechanism by which signals from differentiating tissues extrinsically control stem cell fate in the shoot apex

Topics: Research Communication
Publisher: Cold Spring Harbor Laboratory Press
Year: 2002
DOI identifier: 10.1101/gad.230702
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Provided by: PubMed Central
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