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....
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This note was uploaded on 01/08/2012 for the course BIO 213 taught by Professor Makina during the Fall '09 term at SUNY Stony Brook.
- Fall '09