Abstract
The remarkable developmental plasticity of plants greatly relies on the regulation of stem cell niches in two distal meristems, namely the shoot apical meristem (SAM) and the root apical meristem (RAM). Plants also have a remarkable capability to regenerate new stem cell niches in vitro and in vivo. These distinct features confer plants with an ability to survive and propagate successfully under ever-changing environmental conditions. Studies in the model flowering plant Arabidopsis have revealed that plant hormones, including auxin, cytokinin, and peptides, play key roles in the maintenance of stem cell niches in apical meristems and the de novo regeneration of a new SAM and RAM, which sheds a new light on the signals and molecular mechanisms underlying maintenance of plant stem cell niches and regeneration capacity.
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