Secondary Plant Growth Flashcards
Where does new lateral growth come from in trees?
Vascular cambium
Cork cambium
Where does vascular cambium place the new wood?
To the middle
Where does cork cambium place the new wood?
Toward the outside
Which cambium is responsible for bark production?
Cork cambium
What is the name for the tip of a plant?
Apex
What kind of tissue does vascular cambium add?
Phleom and Xylem
What is wood “impregnated” with?
Lignin
What does cork cambium replace?
Epidermis (from primary growth)
What makes up the periderm?
Cork and cork cambium (created in secondary growth)
Is there more xylem or phloem in secondary growth?
Xylem
Which way does xylem form? Phloem?
Xylem toward the middle (inside of vascular cambium)
Phloem toward the outside
True or false… Cork cambium grows in two directions?
False, only grows in one direction
Are the youngest cells closest or furthest from the cambium?
Closest
What is the ground tissue found between the phloem and the cork?
Cortex
What is the ground tissue found in the middle of the tree?
Pith
What is primary xylem and primary phloem?
First year growth on a green plant or tree
How does the cork cambium develop?
Parenchyma cells in the cortex
What is the order someone would drive through a tree if a whole was cut in the middle?
- Bark
- Cork cambium
- Phloem
- Vascular cambium
- Xylem
- Pith
What makes up the periderm?
Cork and cork cambium
What makes up bark?
Phloem
Cork
Cork cambium
When is spring wood formed? Are the walls thick or thin and why.
Spring time
Thinner to produce food from sunlight and allow for water movement
When is late wood formed? Are the walls thick or thin and why?
Late summer/ early fall
Thicker since there is less need for photosynthesis, but provide support. Contain lignin
Cork cells dead when mature and are layered which what? (3)
Lignin- structure
Suberin- water proofing
Tannins- bad taste
Bark contains everything (inside or outside) the vascular cambium?
Outside
