Download 12 - Plant Systems

Two types of systems:
 Root System
 Shoot System

Anchorage
 Keeps plant in the
soil
 Holds stem in place

Absorption
 water
 dissolved minerals

Storage
 Starch and nutrients
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Large long primary root
Strong anchoring system
Specialized to store water and nutrients
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Many small roots that branch
Increases surface area
Better absorption, less structural
support
Shoot System Function
Main functions:
 Conduct photosynthesis
 Produce flowers for
sexual reproduction
Main components:
 Stem
 Leaf
 Flower



Supports branches,
leaves and flowers
Transport of water and
nutrients through
vascular tissue
Some are specialized for
food storage. Ex) sugar
cane, potatoes, onions

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Main function: Photosynthesis
Parts of the Leaf:
 Epidermis
 Cuticle
 Guard Cells & Stomata
 Palisade cells
 Spongy Layer
 Vascular Tissue

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Outer layers of
cells
Cuticle is waxy
coating on exterior
of leaf
Protects interior,
water proofing
and blocks
passage of gases
http://www.goldiesroom.org/Multimedia/Bio_Images/05%20Nutrition/15a%20Cross%20Section%20of%20a%20Leaf.jpg
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Pore-like openings in
the plant’s epidermis
Opening size controlled
by two guard cells
permits gas exchange
with environment.

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Contains many
chloroplast for
photosynthesis
Cells stand tall
and upright
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Where water
is stored
Location of
vascular
tissues
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Specialized structures developed for sexual
reproduction known as pollination
Can contain both male and female
reproductive structures in the same flower

Male reproductive organ: stamen
 Pollen (male gametes) produced on anther

Female reproductive organ: pistil
 Ovule (female gametes) produced in ovary

Pollination involves the pollen traveling down the
style into the ovary for fertilization
http://www.exploringnature.org/graphics/teaching_aids/flower_parts_color72.jpg
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Zygote (fertilized egg) becomes the seed
Ovary becomes the fruit
http://www.biosci.ohio-state.edu/~plantbio/osu_pcmb/pcmb_lab_resources/images/pcmb101/flwrs_sds_frts/where_fruit.jpg
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Titan Arum’s scent (2:29)
http://www.youtube.com/watch?v=FHaWu2r
cP94&feature=related
Hoverfly and pollen guides (2:29)
http://www.youtube.com/watch?v=MQlq5Qt
RI9o
Orchid mimics female wasps (2:59)
http://www.youtube.com/watch?v=h8I3cqpgnA