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Chapter 8: Structure of Woody Plants (outer bark (Cork and the Cork…
Chapter 8: Structure of Woody Plants
Secondary growth in roots
outer bark
inner bark
all secondary phloem between vascular cambium and innermost cork cambium.
tissues outside inner cork cambium
Lenticels and Oxygen Diffusion
blocks absorption of oxygen
Cork and the Cork Cambium
initiation
phellogen
all cells are cuboidal
cell division
inner cell almost always remains cambium
the outer cell differentiates into a cork cell
Periderrm
maturation
protection
short lived
new cork
secondary xylem
wood
Anomalous Forms of Growth
unusual primary growth
Anomalous Secondary
included phloem
roots of sweet potatoes
secondary growth monocots
unequal activity of the vascular cambium
initiation
Provascular Tissue
Fascicular Cambium
Vascular Cambium
produces secondary plant body
cells
Fusiform Initials
long, tapered cells
Axial xylem
Axial phloem
Ray Initials
Xylem rays
Phloem rays
short and cuboidal
Pith
Interfascicular Cambium
make up cork cambium
become one and make vascular cambium
