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The maize Gα gene COMPACT PLANT2 functions in CLAVATA signalling to control shoot meristem size.

Nature.. 2013-09; 
Bommert P, Je BI, Goldshmidt A, Jackson D. Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA.
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Shoot growth depends on meristems, pools of stem cells that are maintained by a negative feedback loop between the CLAVATA pathway and the WUSCHEL homeobox gene. CLAVATA signalling involves a secreted peptide, CLAVATA3 (CLV3), and its perception by cell surface leucine-rich repeat (LRR) receptors, including the CLV1 receptor kinase and a LRR receptor-like protein, CLV2 (ref. 4). However, the signalling mechanisms downstream of these receptors are poorly understood, especially for LRR receptor-like proteins, which lack a signalling domain. Here we show that maize COMPACT PLANT2 (CT2) encodes the predicted α-subunit (Gα) of a heterotrimeric GTP binding protein. Maize ct2 phenotypes resemble Arabidopsi... More