Basic Plant Morphology (definition)oregonstate.edu/instruct/bot101/Patterson/lectures_05/...Plant...

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Plant Morphology• Shoot System• winter twigs • leaf morphology

• Root System• root architecture• modified roots

Bot 101Botany: A Human Concern

Two IntegratedOrgan Systems

Basic Plant Morphology (definition) -

Shoot System

Root System

1.

2.

Root Systemtap, lateral, adventitious roots

• anchorage• storage

root hairs• elemental mineral uptake• water absorption

Shoot Systemleaves

• light, CO2 capture • (photosynthesis!)

stems• support• transport

flowers• sexual reproduction• pollinator attraction

Organ Systems: Function The Shoot Systemmodular construction

The Shoot SystemStems

• basic structure

winter twig

terminal bud

leaf scar

axillary bud

node

internode

lenticels

bud

scars ?

internode

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Modifications of Stem and Shoot

Stolon - above ground Rhizome - below ground

Tuber - storageBulb - storage

Modifications of Stem and Shoot

Modifications of Stem and Shoot The Shoot System• Leaves

• basic structure (morphology)

bladepetiole + = LEAF

midveinaxillary bud