Plant Parts and Their Functions

Joel Berry

Topic # 2014 A/B

Diversity in the Plant World

http://www.uky.edu/Projects/SeedBiology/images/corn.jpg

http://entomology.wisc.edu/~cullen/research/Soybean-

Aphid_Hayes.jpg

http://cropandsoil.oregonstate.edu/crops/seeds/ogscr/sowhwh/head.jpg

•Key Focus Points

• Structures of a plant

• Root

• Leaf

• Flower

• Functions of those structures

Tap Root Systems

• CHARACTERISTICS:

• 1 Main root

• Small roots develop from main root

• ex: Carrot

http://www.greencastle.k12.in.us/HS/Botany/root_structure_files/slide0014_image028.jpg

Fibrous Root Systems

• CHARACTERISTICS:

• Numerous slender roots

• Shallow root system

• Ex: grass

http://www.cactus-art.biz/note-book/Dictionary/aaa_Dictionary_pictures/Fibrous_root_system.jpg

Root Functions

• Absorb water and nutrients from the soil

• Anchor the plant to allow upright growth

• Store food that is processed in the leaves

Plants and Animals, Biology and Production Lee/Biondo/Hutter/Westrom/Patrick

Root Structure

• Root Hairs• Primary Root• Root Cap• Zone of Elongation

http://www.cactus-art.biz/note-book/Dictionary/aaa_Dictionary_pictures/Fibrous_root_system.jpg

Root Structures and Functions

• Root Hairs: increase water and mineral absorbance by the plant

• Primary Root: the initial root that anchors the seedling

• Root Cap: protects the root as it pushes through the soil

• Zone of Elongation: region of new root growth

Plants and Animals, Biology and Production Lee/Biondo/Hutter/Westrom/Patrick

Leaf Structure

• Epidermis

• Stoma

• Guard Cells

http://www.bbc.co.uk/scotland/education/bitesize/standard/img/biology/leaf_structure_al.gif

Leaf Structure and Function

• Epidermis: skin-like protective layer of cells

• Stoma: openings in the leaf that allow exchange of: oxygen, carbon dioxide,& water vapor

• Guard Cells: control the opening and closing of the stoma

Plants and Animals, Biology and Production Lee/Biondo/Hutter/Westrom/Patrick

Flower Structure

• Sepal• Petal• Stamen• Pistil• Ovary

http://extension.oregonstate.edu/mg/botany/images/fig19.gif

Flower Structure and Function

• Sepal: protects the flower before it opens

• Petal: brightly colored to attract pollinators

• Stamen: male reproductive part of the flower

• Pistil: female reproductive part of the flower

• Ovary: contains eggs and is the site of seed development

Conclusion

• Quiz hints

• Focus on:

• Functions of each part of a plant

• Be able to label the structure of a plant