Chapter 29: Plants

The World of Plants

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1

What is a plant?

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2

Why are plants important?

•
photosynthesis

Photosynthesis
-
conversion of solar
energy to chemical energy

O
2

production

Base of all
food chains

Why are plants important?

•
Photosynthesis


•
Food

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9

Ancient Agriculture Egyptian tomb wall
1500
BC

Modern Agriculture;

people food…

…and herbivore food

Why are plants important?

•
Photosynthesis


•
Food


•
pharmaceuticals

Cinchona tree and quinine Treatment

of fevers by Native Americans,


Andes. Spanish explorers discover the

use for the treatment of Malaria

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15

Why are plants important?

•
Photosynthesis


•
Food


•
Pharmaceuticals


•
Fuel, shelter, paper

Wood for fuel

Wood for building

Fossil fuels from fossilized plant
remains

Paper from pulp
derived from
woody plants

Why are plants important?

•
Photosynthesis


•
Food


•
Pharmaceuticals


•
Fuel, shelter, paper


•
Industrial products

Why are plants important?

•
Photosynthesis


•
Food


•
Pharmaceuticals


•
Fuel, shelter, paper


•
Industrial products


•
Aesthetic benefits!!!

Plants vs. other organisms

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26

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27

Common plants today

Division Bryophyta

Division Pterophyta

Division Psilophyta

Division Sphenophyta

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31

Division Lycophyta

Division Cycadophyta

Division Ginkgophyta

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34

Division Gnetophyta

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35

Division Coniferophyta

Division Anthophyta

Fields of study

•
Plant systematics
–

evolutionary history of plants

•
Plant physiology
–

functionality of plants, such as
photosynthesis, flowering, hormone action

•
Plant anatomy
–

how plant structure relates to
function

•
Plant morphology
–

plant lifecycles, reproduction,
evolution

•
Plant ecology
–

how plants relate to other
organisms, and how plants meet their needs in the
environment

•
Plant genetics
–

biotechnology and genetic
engineering


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38