1. Sarah Lomanto AgEd 410 Cal Poly-SLO
Plant Anatomy
Sarah Lomanto
AgEd 410
Cal Poly-SLO

2. Parts of a Plant
Roots
Leaves
Stems
Fruit
Flowers

3. Diagram of Plant Parts

4. Root Systems Two Basic Types of Root Systems
Fibrous- The roots branch from the bottom of the plant (corn and beans)
Taproot- A long tapering root (carrots and dandelions)

5. Parts of Root Systems
Root Hairs- involved in absorption of nutrients from the soil
Root Cap & Meristem- conducting tissue, involved in conducting moisture & nutrients to the plant

6. Types of Leaves
Simple leaves
Compound leaves
Needle leaves

7. Leaves
Food manufacturing factory of the plant which performs Photosynthesis and contains the green pigment, Chlorophyll

8. Leaves Also...
Capture solar energy, which is converted into chemical energy in the form of sugars and starch and is transferred up the food chain

9. Parts of Leaves
Stomata- small openings in the leaf that help cool the plant through Transpiration
Blade- main body of the plant
Petiole- small stem which attaches the blade to the main plant stem

10. More Parts of Leaves
Midrib- large central vein down the middle of the leaf
Apex- tip of the leaf
Base- bottom of the leaf & attaches to the petiole
Margin- edge of the leaf

11. Different Types of Leaves
Can you identify the parts we discussed on these different types of leaves?

12. Stems Central support structure of the plant
Contain buds which are found in the area referred to as the node

13. External Anatomy of Stems
Internodes- Areas between the buds
Bark Lenticels
Leaf Scars
Scale Scars

14. Internal Anatomy of Stems
Xylem
Phloem
Cambium
Sapwood
Heartwood
Pith

15. Stem Anatomy of Herbacious Plants
Epidermis
Cortex
Pith
Vascular Bundles

16. Fruit Ripened ovule or egg
In most plants the ovule or egg is fertilized by the sperm (the pollen) and the ovary matures into the fruit
Fruit are usually classified by their structure and number of ovules

17. Simple Fruits
Develop from a simple ovary
Can be fleshy or dry

18. Fleshy Simple Fruit Classified as a “Drupe” or “Pome”
A drupe has a stone in the center of the fruit which is the seed
A pome has several seeds, usually in a chamber

19. Dry Simple Fruit
Classified in two categories
Indehiscent
Dehiscent

20. More Fruit Classifications
Aggregate fruits are developed from a single flower with many ovaries
Multiple fruit have flowers that are separated but closely clustered

21. Flowers
Four main parts
Sepals
Petals
Stamens
Pistils

22. Flower Classification
Complete- has all four main parts
Incomplete- missing any of the four primary parts
Perfect- has both a pistil and a stamen (the female and male reproductive structures)
Imperfect- missing the stamen or pistil

23. The Pistil Female reproductive structure and has three primary parts
Stigma- pollen collecting structure, located at the top of the pistil
Style- support structure below the stigma
Ovary- enlarged portion which contains ovules or eggs

24. The Stamen Male reproductive structure usually surrounding the pistil
Anther- pollen bearing structure
Filament- acts as a stalk to support the anther

25. The End