Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to Procambium: ground meristem


The part of the apical meristematic tissue from which primary vascular tissues are derived.



the lateral meristem of a plant from which are differentiated the primary vascular tissues and bundles. The procambium arises in the form of meristematic strands in the growing point of a shoot when leaf traces appear, or it develops in the form of a solid cylinder (or ring) in the growing point of the root in the middle of the primary meristem. The procambium is characterized by intensive longitudinal cell growth and by the elongated (prosenchymal) shape of the cells. Cell division occurs in various directions, with vascular tissues— primary xylem and phloem—arising from the cells. After the formation of vascular tissues in the bundles of gymnospermous and dicotyledonous plants, the procambium functions as cambium. In monocotyledonous plants, the procambium is exhausted completely during the differentiation of closed vascular bundles in the tissue.

References in periodicals archive ?
Within the transition zone tissue differentiation begins with the establishment of the primary histogenes, as are the protoderm, procambium, and the quickly extending groundhistogen (Sachs, 1991:131) which produce during further growth the final tissue organization of the adult vegetation body (final histogenesis: Hagemann 1999).
This auxin resulted in a well-defined procambium, a clear delimitation of the protoderm layer and signs of polarization, which are important features for further maturation of the somatic embryo and the effective conversion into plants.
1985), sugieren que la formacion de areas meristematicas a partir de celulas poco diferenciadas, como el parenquima, ocurre en algunos casos debido a la proximidad de estas ultimas con tejidos meristematicos existentes como el procambium, donde se asume que la concentracion de reguladores de crecimiento es mayor.
12: 257-270, procambium y tejidos vasculares de la hoja.
As the shoot grows, the leaf traces become displaced with reference to the center of the apex as a consequence of the PTM and the elongation of procambium in the plane of the highest number of cell divisions, which must necessarily be circumferential.
Desarrollo del procambium y los tejidos vasculares de la hoja.