Upgrade to remove ads
Urban Tree Care - Quiz 1
Terms in this set (43)
What does CODIT stand for
Compartmentalization Of Decay In Trees
Explain CODIT wall #1
Plugs xylem, to prevent vertical spread
Explain CODIT wall #2
Axial parenchyma prevents decay from moving in toward the pith
Explain CODIT wall #3
Using ray cells, resists lateral decay around the trunk
Explain CODIT wall #4
New tissue grows over decay
In CODIT, what are the 2 different zones?
Wall 4 - Barrier zone
Wall 1-3 - Reaction zone
Name some weak compartmentalizers
Willow, cherry, birch
Name some strong compartmentalizers
Crapemyrtle, elm, catalpa
What CODIT resists the spread into the new tissue formed after injury?
What CODIT prevents spread to pith?
What forms around wall 4 that causes trees to fall apart or break?
A ring crack
What is the correct order of tissues, from bark to pith?
Cork cambium, phloem, cambium, xylem
Living and dead cells
Starch is stored in:
Xylem and phloem
What are the 6 functions of the roots
Absorption, transport, growth, storage, support, regulation
Why do roots grow outward instead of down?
They grow where they can find the most air, nutrients, and water
What is the DBH
It is 1.5ft times the diameter at 4.5ft
What's the difference between the CRZ and the TPZ
CRZ is smaller, closer to tree. TPZ is determined by the DBH.
Determine the CRZ
The area under the tree where the roots must be protected to ensure its survival
What purposes does the crown serve
Food production, growth regulation, flowering and fruiting, transport, growth
What happens as trees age
Less sugars produced, growth decreases, energy from respiration goes to maintenance, low sugar production means faster reserve depletion, less energy is available for defense
What are the 2 types of meristems, and what do they do
Apical (primary) meristems - on root and twig tips; for elongation
Lateral (secondary) meristems - on cambium; for diameter
What are the functions of the trunk
Support, transport, growth, defense
What does cambium do
What does sapwood do? What's another name for it
Carries food from roots to leaves... Xylem!
What does inner bark do? What's another name for it
Carries prepared food from leaves to cambium layer... Phloem!
What are the 2 types of cambium, and what do they do
Cambium produces xylem and phloem
Cork cambium produces bark
What can parenchyma cells be used for
Storage and cell division
What is lacking in palms
Cambium layer, growth rings of xylem
What are the different types of roots
radicle - seed root
primary root - tap root
What are woody roots for
Mainly: STABILITY AND STORAGE
Storage, support, water and mineral uptake, transport
What are fine roots for
Water and nutrient uptake; chemical synthesis
WHEN do fine roots grow
ONLY when temp is above 40. Optimum temp: 68-84
Why does water enter roots
Because the salt content is high. Enters through osmosis.
What does water move up the leaves, and what does it move through
Moves up because of transpiration. Moves through the xylem
what does the root cap do
Protects meristem; senses gravity; protects from pathogens
What percentage of a tree's weight is underground?
Roots and canopy must be in a good balance. Why?
Too few roots: canopy declines due to too few minerals, water, etc
Too few leaves: roots die due to lack of photosynthate
How many times greater is root SA than leaf SA
100 times greater
What % of sugars produced each day are used by roots that same day
Where do most roots reside
In the top 12in of the soil
Explain what happens to roots when soil is at 25%, 5%, and 2% aeration
25%: roots grow well
5%: root growth stops
2%: roots decline and die
Explain excurrent and decurrent growth
Excurrent: strong apical point
Decurrent: lateral shoots outgrow the terminal shoot - no apical dominance
YOU MIGHT ALSO LIKE...
lecture 9: plant anatomy
Chapter 31 (8th Ed.): Plant Structure, G…
Arborists' Certification Study Guide: Chapter 1: T…
Bio 102 Exam 3
OTHER SETS BY THIS CREATOR
Photosynthesis (Taiz and Zeigler ch.7-9)
Test 2 - Water Use Efficiency and Drought
Test 2 - Carbohydrate Metabolism