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Structure of woody plants (Fusiform initials (Ray initials # (Short cells,…
Structure of woody plants
Primary tissues
Epidermis
Cortex
Vascular bundles
Pith
Leaves
Wood
Vascular Cambium
Meristem
Secondary plant body
Fascicular Cambium
Bundle
Interfascicular Cambium
Parenchyma Cells
Secondary thickening
Fusiform initials
Long cells
Ray initials
#
Short cells
Cuboidal
Storage parenchyma
Gymnosperms
Albuminous cells
Tapered ends
Two elongate cells
Secondary Xylem
Secondary phloem
Fusiform initials and Ray initials in longitudinal views
Thin primary walls
Horizontal rows
Secondary Xylem
#
Axial system
Tracheary elements
Longitudinal conduction of H2o
Radial system
Radial system
Woody angiosperms
Uniseriate
Biseriate
Multiseriate
Parenchyma
Ray Parenchyma cells
Upright cells
Procumbant cells
Procumbant cells and Upright cells
Ray Tracheids
Growth rings
Early wood
Wide vessels
Wide tracheids
Late wood
Lower proportion of vessels
Annual Ring
#
Diffuse porus
Yellow birch
Aspen
Sugar maple
American holly
Ring porus
Red oak
Sassafras
Honey locust
Dark wood: Heartwood
Lighter moister outer region: Sapwood
#
Ring porus-Diffuse porus
Reaction wood
Lateral stress
Must be counteracted
Secondary phloem
Axial system
Conduction up and down stem or root
Angiosperms
Sieve tube members and companion cells
Conifers
Sieve cells
Radial system
Outer bark
Cork cambium: Phellogen
Outer cell:cork cell
Phelloderm
Short lived
Cuboid
Periderm->
Lenticels
Anomalous secondary growth
Irregular matrix of parenchyma
Few sieve tube members
Some vessels
Vascular cambia
Seocndary vascular bundles: Phloem and Xylem
Simple meristem
Other name
New layer formed
Converted each year