This preview shows page 1. Sign up to view the full content.
Unformatted text preview: Phloem, found in patches between the xylem arms, comprised of sieve elements and companion cells Pericycle, parenchyma cells just inside of the endodermis, forms the rest of the stele tissue. Older pericycle cells may form secondary walls. Origin of lateral or branch roots (by dedifferentiation) Origin of secondary root cambium and cork cambium (by dedifferentiation) The stele of Monocot roots usually has a thin cylinder of alternating xylem and phloem patches and an internal pith composed of parenchyma cells. The endodermis layer of some monocot roots is very thick....
View Full Document
- Fall '09