Introduction To Plant Science

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Introduction To Plant Science

• Introduction To AgriScience and Technology
• GHS
• Mr. Ham

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Objective 1.1What roles do plants serve in the
ecosystem

• Plants serve several roles in our ecosystem by
  providing the following items
• Oxygen
• Food
• Reduce soil erosion
• Medicines

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Objective 1.2How plant differ from animal

• Plants differ from animals in several ways
• Plants produce their own food with the aid of
  nutrients from the soil.
• Plants are stationary.
• Plants have rigid cell walls with cell membranes
  inside.
• Plants utilize carbon dioxide and give off oxygen.

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Objective 1.3List how plants and animals are
alike.

• Plants and animals are alike in several ways.
• They have a life cycle.
• They carry on life processes, such as
  circulation, respiration and growth.
• They are made of cells.
• They must have food.

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Objective 1.4List three major factors that
affect plant growth

• Major factors in climate that effect plant growth
  include
• Temperature
• Warm season plants start growing in the spring
  and finish in the fall. I.e., bananas, oranges,
  cotton and corn.
• Cool season plants have a life cycle that begins
  in the fall and ends when summer begins. I.e.,
  wheat, rye, and oats.

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Objective 1.4 (cont.)

• Precipitation
• Light

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Objective 1.5Define life cycle in terms of
plants and how they are classified

• Life Cycle refers to the length of the plants
  life.
• Plants can be classified into three groups on the
  basis of their life cycle
• Annuals- complete life within one year.
• Biennials- complete life cycle in two years.
• Perennials- plants live for more than two years.
• Deciduous- plants that lose their leaves in the
  winter.
• Evergreens- plants that retain their leaves year
  round.
• Plants may be perennials but only used as an
  annual in the agricultural industry. I.e. cotton

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Objective 1.6List the different parts of a plant

• Parts of the plants are of two major kinds
• Vegetative
• Leaves- makes food for the plant through a
  process known as photosynthesis.
• Blade -Veins
• Epidermis -Stomata
• Internal cells -Waxy coating
• Petiole -Stipule

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Parts of a Leaf
Waxy Coating
Stomata
Stipule
Stipule
Petiole
Petiole
Vein
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Objective 1.7List the two different types of
leaves

• Leaves are divided into two groups
• Simple
• Compound

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Simple Leaf
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Compound Leaf
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Objective 1.8List the three ways leaves attach
to the stem

• Leaves attach to the stem in several different
  ways.
• Alternate
• Opposite
• Whorled

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Alternate Attachment

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Opposite Attachment

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Whorled Attachment
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Objective 1.9List the different functions of the
stem

• The stem supports the leaves and flowers.
• The stem transport water and other materials.
• The stems also store food.

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Objective 1.10List the different parts of the
stem

• Bark
• Cortex
• Phloem
• Cambium
• Xylem
• Pith

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Xylem Pholem

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Objective 1.11List the types and roles of roots

• Role of roots
• Roots anchor the plant.
• Roots take in water and minerals.
• Roots store energy.
• Types of roots
• Taproots
• Fibrous roots

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Taproot

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Fibrous Root

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Taproot vs. Fibrous