complexity and shapes of leaves agr 161: unit c
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Complexity and Shapes of Leaves AGR 161: Unit C. Found on Internet: Unknown Source Created By: Jennifer Stewart. Objectives. Recognize the complexity of Leaves Identify leaf shapes. Principal Tissues of the Leaf. Epidermis Cuticle Waxy substance covers the leaves and stems - PowerPoint PPT PresentationTRANSCRIPT
Complexity and Shapes of LeavesAGR 161: Unit C
Found on Internet: Unknown Source
Created By: Jennifer Stewart
Objectives Recognize the complexity of Leaves Identify leaf shapes
Epidermis Cuticle
Waxy substance covers the leaves and stems Waterproof layer that keeps water in plants
Principal Tissues of the Leaf
Epidermis (cont) Stomata
Openings in the epidermis mainly located on underside of leaves
Exchange of gases
Principal Tissues of the Leaf
Principal Tissues of the Leaf
Epidermis (cont) Guard Cells
Two cells located on each side of stomata Open and closes stomata Allows gas exchange
Principal Tissues of the Leaf
Mesophyll layer Palisade mesophyll
Primary site of photosynthesis
Spongy mesophyll Contains air and chloroplasts Site of photosynthesis and gas exchange
Veins or vascular bundles In spongy mesophyll Phloem tissues conduct food from
photosynthesis to rest of plant Xylem tissues conduct water and minerals up to
cells in leaves and stems
Principal Tissues of the Leaf
simple leaf = 2 parts (leaf blade and petiole)
Petiole
Leaf
Blade
What is the difference between a simple leaf and a compound leaf?
Compound leaf: leaf blade divided into leaflets
What is the difference between a simple leaf and a compound leaf?
Palmately compound
What are the different types of compound leaves?
Pinately compound
What are the different types of compound leaves?
What are the different types of compound leaves?
Trifoliate (alfalfa)
Shape and size of leaves vary among plants used for
identification of plants
Review What is the
difference between a simple leaf and a compound leaf?
Review
What type of compound leaf is this?
Review What are the three parts of the epidermis? What is the cuticle? What are the guard cells? What are the three different leaf shapes?