Mechanism of stem cell niche control by epidermis in plants

Mechanism of stem cell niche control by epidermis in plants

Development requires coordination between molecular patterning and morphogenesis. Although adaptation to size is often seen in developmental tissues, how tissue geometry and size feedback on gene expression domains is less understood.

Authors explore this question for the characteristic gene expression domains of the plant stem cell niche residing in the shoot apical meristem.

They show that a combination of signals originating from the epidermal cell layer can correctly pattern the key gene expression domains and notably leads to adaptive scaling of these domains to the size of the tissue.

Using live imaging, authors experimentally confirm this prediction. The identified mechanism is also sufficient to explain de novo stem cell niches in emerging flowers.

These findings suggest that the deformation of the tissue transposes meristem geometry into an instructive scaling and positional input for the apical plant stem cell niche.

http://advances.sciencemag.org/content/2/1/e1500989
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