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Root and Stem Anatomy
A. PRIMARY ROOT
Investigate a prepared slide showing a cross section of buttercup root. Connect label lines to the overview and to your close-up from the left list, to just your close-up from the right list. Ranunculus root cs Ranunculus root cs close-up of gray area overview
-epidermis- -starch grain
-cortex-
-endodermis- -gas space
-pericycle-
-phloem-
-xylem- -Casparian strip
protostele siphonostele radial collateral endarch exarch triarch tetrarch
Observe a prepared cross section of the catbrier ( Smilax ) root. Connect label lines to the overview and to your close-up from the left list, to just your close-up from the right list. Smilax root cs Smilax root cs close-up of gray area overview -epidermis-
-cortex- -starch grain
-endodermis-
-pericycle- -gas space
-phloem-
-xylem- -Casparian strip
-pith-
protostele siphonostele radial collateral endarch exarch triarch tetrarch polyarch
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B. PRIMARY STEM
Observe prepared cross and longitudinal sections of sunflower ( Helianthus ) stems. Connect label lines to both the overview and your close-up from the left list, to just your close- up from the right list. Helianthus stem cs Helianthus stem cs close-up of gray area overview -epidermis- -cuticle -collenchyma -cortex- -parenchyma -chloroplast -vascular bundle- -gas space -endodermis -pith ray- -Casparian strip -phloem fibers -pith- -phloem sieve tube element -phloem companion cell -vascular cambium -xylem vessel -xylem tracheid eustele siphonostele radial collateral endarch exarch use a brace { from the left list to show the vascular bundle in the close-up sketch
Check out a Ranunculus stem cross section too. This plant (buttercup) is much shorter; how is its anatomy different compared to the huge sunflower? Buttercup is a plant found in moist, humid, and shady forest floor. Sunflower is found in hot, dry grasslands. How is buttercup anatomy different because of its habitat compared to sunflower (hint: epidermis)?
Ranunculus stem cs (extreme closeup ) (hint: sketch rotated with epidermis left and pith to right)
cutin- stoma- guard cell- epidermis- gas space- cortex- chloroplast- Has apoptosis occurred? yes no
