Plant Structure, Reproduction and Development

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Plant Structure, Reproduction and Development

• Botany - Lecture 1
• Ross Nicholson M.Sc.
• 966-2222
• ross.nicholson_at_usask.ca

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Why Plants?

• Humans depend on plants

• Plants are interesting

Plants are beautiful
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The Plant Body
All Plants are
In this section we will concentrate on flowering
plants Angiosperms
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Some plants have modified roots and stems
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Monocots and Dicots
are the two major divisions of Angiosperms
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Plant Anatomy
Review basic plant cell anatomy Learn to
distinguish between the main types of plants
cells Describe the three tissues systems and main
tissue types where they are in the plant what
kind of cells they are made of
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Basic Plant Cell
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Main differences between plant and animal cell
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Plant Cell Wall

• All plant cells have a primary cell wall

• Only certain types of plant cells have a
  secondary cell wall

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Parenchyma Cell
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Collenchyma Cell
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Sclerenchyma Cells
Come in various shapes and sizes
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Water Conducting Cells
All have thick secondary walls, and no living
contents
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Food Conducting Cells
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Plant Tissue Systems
You can find these three tissue systems in all
parts of the plant
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Tissue Systems and Cell Types
Tissue System Dermal Vascular Ground
Tissue
Cell Types
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Root Tissue Systems
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Stem Tissue Systems
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Leaf Tissue System
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Plant Growth
Indeterminate Growth
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Primary vs Secondary Growth
Primary growth
Secondary growth
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Primary Growth in Roots
Notice root hairs are not found in the zone of
elongation why?
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Primary Growth in Shoots
Shoot Apical Meristem
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Secondary Growth in Shoots
There are two lateral meristems that form
Vascular cambium
Cork cambium
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Secondary Growth Diagram
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Log Anatomy
Sapwood Heartwood
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What is the significance of Secondary Growth?
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Next Day

• Plant Reproduction
• Basic flower structure
• Angiosperm lifecycle
• Seed development
• Seed germination