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Structure of Woody Plants (growth rings image (first wood (early wood…
Structure of Woody Plants
Tissues
Primary
vascular bundles
pith
cortex
leaves
epidermis
Secondary
wood
bark
conducting tissue
moves more water
Vascular Cambium
secondary plant body
no cell cycle arrest
fasciclular cambium
cell cycle arrest
resume mitosis
interfascicular cambium
types of cells
fusiform initials
long, tapered cells
dicots
140-462mm
conifers
700-8700mm
ray initials
short
cuboidal
secondary xylem
wood
axial system
tracheary elements
longitudinal conduction
gives strength and flexibility
radial system
parenchyma
rays
biseriate
mmultiseriate
uniseriate
upright cells
procumbant cells
growth rings
first wood
early wood
spring wood
high proportion of wide vessels
late wood
summer wood
lower proportion vessels
year older
larger, heavier
stronger
annual ring
1 years growth
outer bark
cork and cork cambium
phellem cell
phelloderm
periderm
resistant cork cells
