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Structure of woody plants (Vascular cambium (Initiation of VC (Fasicular…
Structure of woody plants
Vascular cambium
Initiation of VC
Fasicular cambium
Interfasicular cambium
Fusiform initials
Produces 2 elongated cells
Ray initials
Short & cuboidal
Arrangement of Cambrial Cells
Produce 2nd cell body
Secondary Xylem
Types of Wood Cells
Contains all Cells in primary
No new cells
Axial system
From fusiform initials
Tracheids
Parenchyma
Fibers
Vessels
Radial system
From ray initials
Ray tracheids
Ray parenchyma
Growth rings
Early wood
Late wood
Unusually cold winter = no ring
❄️❄️🌤=🚫 💍
Heartwood and Sapwood
Heartwood = dark
Sapwood = light
Reaction wood
Produced in response to stress
Secondary phloem
Axial & Radial system
Sieve tube members & companion cells
Outer bark
Cork & Cork cambium
Cork cambium = phellogen
Cork cell= phellem cell
Outside inner CC = outer bark
Lenticels and oxegyn diffusion
Lentiicels permit oxygen flow
Initiation of cork cambium
Secondary growth in roots
Dicot
Monocot
Anomalous forms of growth
Anomalous secondary growth
Alt. Cambium have 2nd bodies
Included phloem
2nd phloem between 2 Xylem bands
Secondary vascular bundles in monocots
Unusual primary growth
Establishment growth
