Root meristems and primary tissues. Root apical meristem mitosis. Be able to identify all of the mitotic stages and know what order they occur in. (review). Root promeristems. apical meristem promeristems primary tissues. Root promeristems. What tissues are forming here?.
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Be able to identify all of the
mitotic stages and know
what order they occur in.
What tissues are
Be able to identify epidermis, cortex, parenchyma, endodermis, passage cells,
stele or vascular cylinder, pericycle, xylem, phloem,residual procambium,
Parenchyma cells are where
plants store most of their starch.
When proplastids in
parenchyma cells are exposed
to light, they often develop
Plants usually store more starch
in their roots than in their stems.
Can you think of a possible
reason why they do that?
Note that there is parenchyma
in the middle of this monocot
root. Cells in the outer part of
the cortex have differentiated
into fibers, and the epidermis
Be able to identify epidermis,
exodermis, cortex and cortical
parenchyma, endodermis and
endodermal cells, pericycle,
primary phloem, primary xylem,
vessel cells, sieve cells,
undifferentiated xylem parenchyma.
(This is a cross section of a corn or maize root, Zea.)
Notice that the endodermis is very lignified.
Do you think water could pass through this endodermis?)
Be able to identify all tissues and cell types.
(These are Smilax root cross sections. The common
Name of Smilax is catbrier or sawbrier.)