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Chapter 8: Structure of Woody Plants (Vascular Cambium (Fusiform…
Chapter 8: Structure of Woody Plants
Vascular Cambium
Initiation
Fascicular Cambium
Provascular Tissue
Interfascicular Cambium
Comes from Pith
Fusiform
Longitudinal Cell Division
Anticlinal Walls
Perpendicular to Cambium's Surface
Periclinal Wall
Parallel to the Circumference of Cambium
Axial Xylem/Phloem
Ray
Perclinal Cell Division
Parenchyma Cells
Wood
Tracheids, Vessel Elements, Fibers
Phloem
Sieve Cells, Sieve Tube Members, Companion Cells, Fibers
Arrangement
Rays
Vertical
Fusiform
Horizontal
Outer Bark
Cork and Cork Cambium
Periderm
Phellogen
Phelloderm
Phellem
Outer Bark
Outside Inner most Cork Cambium
Inner Bark
Secondary Phloem and Innermost Cork Cambium
Lenticles and Oxygen Diffusion
Aerenchymatous Cork
Pathway for Oxygen
Secondary Phloem
Secondary Xylem
Types of Wood Cells
Axial System
Fusiform Initials
Radial System
Ray Initials
Hardwood
Lots of Fiber
Softwood
Little to No Fiber
Ray Tracheids
Growth Rings
Early Wood
Spring/Summer
Late Wood
Fall/Winter
Heartwood and Sapwood
Heartwood
Inner Dark Region
Sapwood
Lighter Moist Outer Region
Reaction Wood
Works Against Gravity
