<P> Unlike the shoot apical meristem , the root apical meristem produces cells in two dimensions . It harbors two pools of stem cells around an organizing center called the quiescent center ( QC ) cells and together produce most of the cells in an adult root . At its apex , the root meristem is covered by the root cap , which protects and guides its growth trajectory . Cells are continuously sloughed off the outer surface of the root cap . The QC cells are characterized by their low mitotic activity . Evidence suggests that the QC maintains the surrounding stem cells by preventing their differentiation , via signal ( s ) that are yet to be discovered . This allows a constant supply of new cells in the meristem required for continuous root growth . Recent findings indicate that QC can also act as a reservoir of stem cells to replenish whatever is lost or damaged . Root apical meristem and tissue patterns become established in the embryo in the case of the primary root , and in the new lateral root primordium in the case of secondary roots . </P>
<P> Unlike the shoot apical meristem , the root apical meristem produces cells in two dimensions . It harbors two pools of stem cells around an organizing center called the quiescent center ( QC ) cells and together produce most of the cells in an adult root . At its apex , the root meristem is covered by the root cap , which protects and guides its growth trajectory . Cells are continuously sloughed off the outer surface of the root cap . The QC cells are characterized by their low mitotic activity . Evidence suggests that the QC maintains the surrounding stem cells by preventing their differentiation , via signal ( s ) that are yet to be discovered . This allows a constant supply of new cells in the meristem required for continuous root growth . Recent findings indicate that QC can also act as a reservoir of stem cells to replenish whatever is lost or damaged . Root apical meristem and tissue patterns become established in the embryo in the case of the primary root , and in the new lateral root primordium in the case of secondary roots . </P>
which meristematic tissue is found in root and shoot apex
which meristematic tissue is found in root and shoot apex
root
root