Plant Physiology Unit Leaves Miss. Perry Floral Design

Functions of Leaves ● Manufacture food for the plant – through process of photosynthesis ● Equation for Photosynthesis: CO 2 + H 2 O → C 6 H 12 O 6 + O 2 ● Photosynthesis only occurs when light is present

Leaf Terms ● Epidermis: outside layer of the leaf (leaf surface) ● Stomata: openings in the leaves where carbon dioxide comes in from the atmosphere (needed for photosynthesis) ● Transpiration: the loss of water vapor from the plant; most water is lost from the stomata, some through the cuticle layer

A typical leaf contains: Leaf Blade Petiole Node

Leaf Activity Take one sheet of colored paper

Leaf Activity Fold the paper “hamburger style”

Leaf Activity Fold the paper one more time, making it look like a book.

Leaf Activity Unfold the paper and have it laying “hot dog style”

Leaf Activity Fold right and left sides into the middle fold.

Leaf Activity Fold the paper in half, so it looks like a book. And then fold it again.

Leaf Activity Unfold the paper to where it looks like this:

Leaf Activity Rip the paper where it is folded, making 8 flaps You should be able to make 8 flaps. Please see the example.

Leaf Activity ● Fold the top corners of each flap:

Leaf Activity ● See example that is on the Elmo Cam. Please make yours look like the example.

Filling it out ● The next slides will show you the different types of leaf patterns. (The same ones that are on your folded paper) ● When you see that type of leaf, please open the flap and draw the picture of that leaf.

Example Simple Open the flap and draw the pictures

● If there is more than 2 leaves that you need to draw, then squeeze them in. AlternateOpposite Whorled

Types of Leaves ● Simple ● Compound

Leaf Arrangement ● Alternate ● Opposite ● Whorled

Leaf Types Palmately Compound Even Pinnate Odd Pinnate

TELEPHONE!! I show you the picture and you say the vocabulary word.

Simple

Compound

Odd Pinnate

Alternate

Opposite

Whorled Arrangement

Palmate Compound

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Pistil The female reproductive system of a flower

Stamen ● The male reproductive system of a flower

Petal ● This part of the flower attracts pollinators to the flower

Anther ● This part holds the pollen

Stigma ● This part of the flower is usually sticky and collects the pollen