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Chapter 7: Roots (Other Types of Roots and Modifications (Prop Roots…
Chapter 7: Roots
Other Types of Roots and Modifications
Storage Roots
carbohydrates
Prop Roots
vascular bundle
can produce adventitious roots
do not make contact with soil
Buttress roots
Aerial Roots of Orchids
epiphytic
dangle freely in air
Contractile Roots
Mycorrhizae
ectomycorrizal relationship
endomycorrhizal association
Root Nodules/Nitrogen Fixation
infection thread
Haustorical Roots of Parasitic Flowering Plants
Roots of Strangler Figs
Internal Structure of Roots
Root Cap
Zone of Elongation
allows roots to elongate
vaculos merge
Regions of Maturation
root hair
pericycle
xylem/phloem
cortex
Zone of Maturation
quiescent center
apical meristem
endodermis
Origin and Development of Lateral Roots
expanded epidermis
intitated deep within the root
External Structure of Roots
Organization of Root Systems
lateral roots
develop from radicle
fibrous root system
adventiticus roots
Structure of Individual Roots
root cap
mucigel
