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Chapter 4 part 2, meristems. day 4
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Plants get bigger by...
- cell division and cell elongation
Meristems
-area of unspecialized tissue
-where cell division occurs in most plants
Initials
-meristimatic; ability for dividing cells
Derivatives
-cells no longer divide
-forms special tissue types
-"mature" cells
(Meristem types) Apical meristem
- apex or tip (root, stem, branch)
- increase length
-in youngest part
-hebeceous plants (non-woody) and annuals
(Meristem types) Primary meristems
-next to apical meristem
-cells both dividing and specializing
- in roots and stems
-form primary tissues
3 types of meristems
protoderm, ground meristem, and procambium
Primary tissue formed...Protoderm?
Dermal- Epidermis
Primary tissue formed...ground meristem
ground-parenchyma
Primary tissue found...Procambium
Vascular- Xylem and Phloem
label them....
root camp
root apical meristem
proderm
ground meristem
procambium
epidermis
cortex
vascular cylinder
Lateral meristems (cambium, secondary meristems)
-inside of the plant
-forms when plant is older
-increases width or diameter
-woody plants
-older plants or perennials
-forms secondary tissue
Intercalary and basal meristems
-within the stem or at base of stem
-between the other stems
- in grasses, found at the base of plant
ex) Basal meristem is why we have to cut grass
Marginal meristem
-at edge or margin
-add cells to outside of a leaf
ex) explains why in spring leaves seem to grow quickly
Floreal meristems
-form flowers rather than leaves
Author
efrain12
ID
131858
Card Set
Chapter 4 part 2, meristems. day 4
Description
day 4, Meristems
Updated
1/31/2012, 1:54:48 AM
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