1. Plant Science
Agscience I
Stalder

2. Human Needs Direct Plant Source: plants or products used by humans
Indirect Plant Source: Plants used as animal feed and humans use the animals or its products
Meeting Basic Needs
Food
Clothing
Shelter

3. Role of Plant Science Field Crops Horticulture Crops Forestry Agronomy
Ornamental Horticulture
Floriculture – plants for foliage (flowers)
Landscape Horticulture – outdoor environment
Food Crop Horticulture
Olericulture - vegetables
Pomology - fruits
Forestry

4. Important Plants & Uses
Grain Crops
Wheat, oats, barley, rye, rice corn
Sugar & Oil Crops
Sugar cane, sugar beet
Soybean, cotton, canola, corn
Fiber Crops
Cotton, flax, hemp, jute

5. Important Plants & Uses
Vegetable, Fruit & Nut
Forage
Use leaves and stems for animal use
Hay, grasses, legumes
Ornamental
Turf, flowers, shrubs, vines
Other
Herbs – non-woody plant used to enhance food
spices – an aromatic plant part
medicinal plants – pain killers, oitments

6. The Plant Kingdom Four major groups: Mosses Ferns Gymnosperm
“naked seeds”
seeds lay on the scales of cones
Angiosperms
Flowering plants
Seed is enclosed in the fruit

7. Flowering Plants Two Classes Monocots Dicots
Lilies, grasses, corn and palms
Dicots
Oaks, cacti, roses and soybeans

8. Flowering Plants Monocots Dicots Leaves Flowers Stems Seedlings
Long, narrow blades, parallel veins
Broad to narrow leaves with netted veins
Flowers
Parts in multiples of three
Parts in multiples of four or five
Stems
Vascular bundles scattered
Vascular bundles arranged in circle
Seedlings
One seed leaf
Two seed leaves

9. Plant Life Cycles Life Cycle
Time when a plant begins growth until the time it dies.

10. Plant Life Cycles 3 groups Annuals
Complete their life cycle within one year.
Must replant every year.
Corn, soybeans, marigolds, ragweed, zinnias

11. Plant Life Cycles Biennials
Normally require 2 growing seasons to produce flowers and fruit before dying
Hollyhock, parsley, beets, carrots

12. Plant Life Cycles Perennials
Plants that have a life cycle of more than 2 years.
Produce seeds every year for many years.
2 types
Herbaceous – soft shoots that are killed by frost
Daylilies, tulips, asparagus
Woody – wood and buds above ground that survive winter
Maple, honeysuckle, grape

13. Plant Parts
Stem
Leaves
Roots
Flowers

14. Stem Vascular Tissue Buds
Xylem = transports water & nutrients from roots
Phloem = transport food produced by leaves
Buds
Terminal = end of the stem
Lateral = on the side of the stem

15. Leaves Petiole = stem of a leaf Simple = petiole + 1 leaf
Compound = numerous petioles and/or leaflets

16. Roots Tap Fibrous Adventitious Single, large root, grows straight down
Many small roots that grow underground
Adventitious
Do not need to be underground, help plant to climb

17. Flower Look on pg 299 for flower diagram
Record all parts of the flower
Identify if they are male, female or both
Identify its job