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Chapter 7: Roots (Other Types of Roots and Root Modifications (Mycorrhizae…
Chapter 7: Roots
Other Types of Roots and Root Modifications
Mycorrhizae
Relationship btw Soil Fungi and Roots
Endomycorrhizal
Inside cell
Ectomycorrhizal Relationship
Outside Cell
Root Nodules and Nitrogen Fixation
Nitrogen Fixation
Atmospheric to usable Compound
Contractile Roots
Roots Frim in Soil
Pull Stem to Soil
Aerial Roots of Orchids
Grow on Bark
Dangle in Air
Adapted to Drought
Haustorial Roots of Parasitic Flowering Plants
Haustoria
Modified Parasitic Roots
Penetrate into Host Tree
Prop Roots
Roots of Strangler Figs
Kills Host Tree
Cling to the Bark
Wrap around Host Roots
Storage Roots
Carbohydrates accumulated in the summer
Internal Structure of Roots
Zone of Elongation
Behind Apical Meristem
Primary Xylem/Phloem
Short
Little Absorption
Zone of Maturation
Root Hair Zone
Endodermis
Casparian Strips
Root Apical Meristem
Quiescent Center
Mitotic Division
Mature Portions of the Root
Passage Cells
Allow Absorption of Minerals
Root Pressure
Water Pressure
Root Cap
Protection
Sloughing off then regenerating
External Structure of Roots
Organization of Root Systems
Fibrous Root System
Radicle
Embryonic Root
Present in Seed
Adventitious Roots
Lateral Roots
Branch Roots
Grow from Taproot
Grow more Lateral Roots
Structure of Individual Roots
Root Hairs
Only zone of Maturation
Zone of Elongation
Just behind Cap & Root Meristem
Cell division and expansion
Root Cap
Secrete Mucigel
Origin and Development of Lateral Roots
