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. Author manuscript; available in PMC: 2010 Feb 1.
Published in final edited form as: Curr Opin Plant Biol. 2008 Nov 29;12(1):29–35. doi: 10.1016/j.pbi.2008.10.006

Figure 2.

Figure 2

Mutant tmm stems have no stomata at maturity, but they do execute entry asymmetric divisions. TMM signaling is required to promote meristemoid self-renewal/maintenance in stems, similar to leaves.

(a) Mature wild-type stems have stomata (yellow) with adjacent smaller cells (asterisks) formed by differentiation of SLGCs. (b) In tmm mutant stems, meristemoids do not progress to the GMC stage and instead differentiate as pavement cells (also yellow). (c) Early in stem epidermal development, tmm plants execute entry asymmetric divisions. The smaller cells (red) have the shape and molecular signature of meristemoids.