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Updated: Feb 7, 2026

Confocal Live Imaging of Shoot Apical Meristems from Different Plant Species
Published on: March 29, 2019
HAIRY MERISTEM with WUSCHEL confines CLAVATA3 expression to the outer apical meristem layers
Abstract:
The control of the location and activity of stem cells depends on spatial regulation of gene activities in the stem cell niche. Using computational and experimental approaches, we have tested and found support for a hypothesis for gene interactions that specify the Arabidopsis apical stem cell population. The hypothesis explains how the WUSCHEL gene product, synthesized basally in the meristem, induces CLAVATA3-expressing stem cells in the meristem apex but, paradoxically, not in the basal domain where WUSCHEL itself is expressed. The answer involves the activity of the small family of HAIRY MERISTEM genes, which prevent the activation of CLAVATA3 and which are expressed basally in the shoot meristem.
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Meristems and Plant Growth
Outer Layers of the Cell Envelope
Primary and Secondary Growth in Roots and Shoots
Plant Cells and Tissues
Assessment of apical pulse
Assessing the apical pulse is a critical nursing procedure, particularly indicated for:
Assessment of apical radial pulse
The A-R pulse assessment involves simultaneous evaluation of the apical and radial pulses. When the apical and radial pulse rates vary, this assessment helps identify a pulse deficit.
Pre-Procedural Preparation

