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ROOT MORPHOLOGY, Assimilatory - Coggle Diagram
ROOT MORPHOLOGY
Develoment
- Environmental change occur
- Rhizoid evolved into roots
- So, water & nutrients were absorb by rhizoid
- Rhynophyta (1st vascular plant) lacked roots
- Root grows from radicle during germination
- Environment effect root structure (adaptation)
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Root Modification
Storage root
Fusiform
swollen middle, tapers ends, spindle shape
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Napiform
swollen base, almost spherical, abruptly taper ends (tail-like)
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Conical
swollen and broad base, apex tapers form a con
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Tuberous
thick & fleshy, indefinite shape
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Prop root
Climbing
developed from nodes and are aerial root that twist & clasp the support & climbing, found in climber plants
Aerial
arise from stem base entering crevices of the support to fix the epiphyte, have white surface - velamen (dead cells, water proof barrier), found in orchids
Adventitious
horizontal branches give rise to aerial root: hang vertically reaching the ground - pillar / as mechanical support
Buttresses
great plant-like roots radiate from the base stem, consists partly root and stem, soil is wet and unstable
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Vital Function
Sucking root (Haustoria)
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parasatic, produces knob like root penetrating into the host & draw nourishment
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