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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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root apical meristem mitosis
Root apical meristem mitosis

Be able to identify all of the

mitotic stages and know

what order they occur in.

(review)

root promeristems
Root promeristems

apical meristem

promeristems

primary tissues

root promeristems4
Root promeristems

What tissues are

forming here?

slide5
Dicot root primary tissuesYou should be able to identify the tissues and cell types and know the functions of the cell types.

Be able to identify epidermis, cortex, parenchyma, endodermis, passage cells,

stele or vascular cylinder, pericycle, xylem, phloem,residual procambium,

casparian strips.

starch grains in parenchyma cells
Starch grains in parenchyma cells

Parenchyma cells are where

plants store most of their starch.

When proplastids in

parenchyma cells are exposed

to light, they often develop

into chloroplasts.

Plants usually store more starch

in their roots than in their stems.

Can you think of a possible

reason why they do that?

monocot root primary tissues
Monocot root primary tissues

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

is disappearing.

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.)

root anatomy of another monocot root
Root anatomy of another monocot root

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.)