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Plant Structure
- Roots anchor the plant to the ground. They are also the site of absorption of water and minerals from the soil and a site of food storage.
- The leaf is the primary site of photosynthesis in most plants. The outer layer of the leaf is covered with a cuticle to prevent the loss of water. The cells of the mesophyll contain numerous chloroplasts where photosynthesis takes place.
- Stomata are pores on the surface of leaves that allow for gas exchange. Guard cells flanking a stoma change shape in order to control the opening and closing of the stoma.
- The xylem conducts water and minerals from the roots to the rest of the plant. The xylem is composed of tracheids and vessel elements arranged in chains.
- The phloem conducts nutrients from sites of production to the rest of the plant. Companion cells associated with the sieve-tube elements regulate the flow of nutrients.
- Plants can grow indefinitely due to the undifferentiated, embryonic cells in their meristems. Primary growth increases the length of the plant. Non-herbaceous plants also undergo secondary growth, which results in an increase in width.
Plant Structure
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
- Intro
- Plant Tissue
- Cell Types in Plants
- Xylem
- Phloem
- Roots
- Taproots & Fibrous
- Aerial Roots & Prop Roots
- Structures and Functions of Root: Dicot & Monocot
- Pericyle
- The Nitrogen Cylce
- Mycorrhizae
- Stems
- Leaves
- Blade & Petiole
- Upper Epidermis, Lower Epidermis & Cuticle
- Ground Tissue, Palisade Mesophyll, Spongy Mesophyll
- Stomata Pores
- Guard Cells
- Vascular Tissues: Vascular Bundles and Bundle Sheath
- Stomata
- Stomata & Gas Exchange
- Guard Cells, Flaccid, and Turgid
- Water Potential
- Factors for Opening Stoma
- Factors Causing Stoma to Close
- Overview of Plant Growth
- Primary Plant Growth
- Apical Meristems
- Root Growth: Zone of Cell Division
- Root Growth: Zone of Cell Elongation
- Root Growth: Zone of Cell Differentiation
- Stem Growth: Leaf Primodia
- Secondary Plant Growth
- Secondary Plant Growth Overview
- Vascular Cambium: Secondary Xylem and Phloem
- Cork Cambium: Periderm and Lenticels
- Example 1: Leaf Structures
- Example 2: List Three Types of Plant Tissue and their Major Functions
- Example 3: What are Two Factors that Stimulate the Opening or Closing of Stomata?
- Example 4: Plant Growth
































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