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Chapter 7: Roots (Other Types of Roots and Root Modifications (Prop Roots,…
Chapter 7: Roots
External Structure of Roots
Organization of Root Systems
lateral roots
branch roots
radicle
develops from embryonic root
fibrous root system
adventitious roots
increase absorptive capacities
Structure of Individual Roots
no leaves
no axillary buds
root cap
thick layer of cells in root apical meristem
zone of elongation
behind root apical meristem
Internal Structure of Roots
Root Cap
layer closest to root apical meristem
Zone of Elongation
cells expand greatly
Zone of Maturation
root hairs grow outward
waters absorption increases
Other Types of Roots and Root Modifications
Storage Roots
provide long term storage for carbohydrates
Prop Roots
extensive roots to the soil
Contractile Roots
extend through soil
they firmly anchor then slowly contract
Roots of Strangler Figs
birds eat fruits of strangler figs
