Sentence Examples


  • The cylinder is surrounded by a mantle of one or more layers of parenchymatous cells, the pericycle, and the xylem is generally separated from the phloem in the stem by a similar layer, the mesocycle (corresponding with the amylom sheath in mosses).
  • The pericycle and mesocycle together form the conjunctive tissue of the stele in these simplest types.
  • In the root the mesocycle, like the phloem, is interrupted, and runs into the pericycle where the xylem touches the latter (fig.
  • Such a vascular cylinder is called a haplostele, and the axis containing it is said to be haplostelic. In the stele of the root the strands of tracheids along the lines where the xylem touches the pericycle are spiral or annular, and are the xylem elements first formed when the cylinder is developing.
  • Or many protoxylems. When the protoxylem strands are situated at the periphery of the stele, abutting on the pericycle, as in all roots, and many of the more primitive Pteridophyte stems, the stele is said to be exarch.

How would you define pericycle? Add your definition here.

comments powered by Disqus