Shoot meristem maintenance is controlled by a GRAS-gene mediated signal from differentiating cells
Open Access
- 1 September 2002
- journal article
- Published by Cold Spring Harbor Laboratory in Genes & Development
- Vol. 16 (17) , 2213-2218
- https://doi.org/10.1101/gad.230702
Abstract
Plant shoot development depends on the perpetuation of a group of undifferentiated cells in the shoot apical meristem (SAM). In thePetunia 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 andSHOOTMERISTEMLESS (PhSTM). This reveals a novel mechanism by which signals from differentiating tissues extrinsically control stem cell fate in the shoot apex.Keywords
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