• cell
  • Plants have the capacity to continuously produce organs throughout their life because they maintain stem-cell containing structures called meristems. (cea.fr)
  • Stem cell proliferation in a niche within developing roots is limited by the gaseous hormone ethylene. (sciencemag.org)
  • cells
  • The central zone (CZ) at the SAM tip harbors the self-renewing pluripotent stem cells and the organizing center, providing daughter cells that are continuously displaced into the interior rib zone (RZ) or to the surrounding peripheral zone (PZ), from which organ primordia are initiated. (biologists.org)