Skeletal System of the Plant World

Slides:



Advertisements
Similar presentations
Horticulture Science Lesson 8 Understanding Stem Anatomy
Advertisements

Specialized Tissue in Plants
Unit 7 Plants Ch. 23 Roots, Stems, & Leaves.
Plant Structure and Growth
1 Review What are three important functions of stems Explain How does the arrangement of vascular bundles in monocot stems differ from dicot stems Apply.
Roots anchor plants and absorb mineral nutrients from soil.
13B-3 Roots Not always underground Anchor the plant
Plant Structures Roots, Stems, and Leaves
HortBotany Lesson Plan #7
Copyright © 2005 Brooks/Cole — Thomson Learning Biology, Seventh Edition Solomon Berg Martin Chapter 33 Stems and Plant Transport.
Forests. Importance Wildlife habitat Soil Erosion Wind block Aesthetics Fuel Climate moderation.
Four functions of stems
STEMS Purpose of Stems Support leaves Transport water and nutrients Store water and food.
Plant Structure and Function
Ch 29 – Plant Structure and Function
Plant Unit Notes 4 of 5 Name: Hour:
Plant Tissues and The Vascular System Interest Grabber Let the Water Flow Recall that vascular tissue transports water and nutrients throughout a plant.
Plant Structure and Function
Plant structure - cells, tissue, organisation & growth Leaves and photosynthesis C 4 photosynthesis CAM photosynthesis Plant water relations Plants and.
Plant Organs – Roots & Stems 3 things to know STRUCTURE - anatomy FUNCTION – what is the primary purpose MODIFICATION – other possible functions (aside.
Patterns of Structure and Function in Plants. Brain Viagra In The News.
Chapter 23 Plant Structure and Function
A. Plants have 3 organs:  1. Roots- Anchor Absorb water and nutrients  2. Leaves- Photosynthesis  3. Stems- Support and transport.
KEY CONCEPT Plants have specialized cells and tissue systems.
Lesson Overview Lesson OverviewStems THINK ABOUT IT While choosing items at a salad bar, you add some sliced water chestnuts, bamboo shoots, asparagus,
Understanding Stem Anatomy
STEMS. LEAF ARRANGEMENT ALTERNATE LEAF ARRANGEMENT OPPOSITE.
Chapter 33: Stems and Plant Transport Chapter 34: Roots.
Either woody or nonwoody Generally, adapted to support leaves; also transport materials and provide storage -stolons – grow along soil surface and produce.
Stems and Plant Transport
1 Stem Anatomy Lesson Plan: NRES B Anticipated Problems 1. What are the functions of a stem? 2. What are some of the external structures of stems?
Modern Biology: Section 31-3
Plant Structures Stems Horticulture I Specialized Tissues in Plants Plants are as successful if not more successful than animals Plants are as successful.
Support a plant….be a stem!
End Show Slide 1 of 36 Copyright Pearson Prentice Hall Biology.
21.1 Plant Cells and Tissues TEKS 5B, 10B, 10C KEY CONCEPT Plants have specialized cells and tissue systems.
Plant Structure and Function Chapter 31. Plant cells: Parenchyma Large central vacuole Storage of water Form the bulk of non- woody plants.
Plant Anatomy Unit 1 Chapter 6 Lesson 2.
The Four Basic Parts of Plants
Plant Organs Roots & Stems.
STEM. Stem Types Herbaceous stems -Soft, green, flexible -Annuals, biennials, or perennials that die to the ground at the end of the growing season Woody.
Stems Students will be able to explain and demonstrate stems of plants.
Lesson Overview 23.3 Stems. Lesson Overview Lesson OverviewStems THINK ABOUT IT While choosing items at a salad bar, you add some sliced water chestnuts,
PLANT STRUCTURE AND FUNCTION
Plant Anatomy Lesson 2 Stem Anatomy
Section 3.  Stems produce leaves, branches, and flowers.  stems hold leaves up to the sun.  And stems transport substances throughout the plant.
Stems.
Plant Anatomy Lesson 2 Stem Anatomy
Vascular Plant Structures
Plant Structures Roots, Stems, and Leaves
Roots anchor plants and absorb mineral nutrients from soil.
Roots anchor plants and absorb mineral nutrients from soil.
Roots anchor plants and absorb mineral nutrients from soil.
Lesson Overview 23.3 Stems.
Lesson Overview 23.3 Stems.
Plant Organs Stems: Structure & Function Transport in Plants
Stems.
Roots anchor plants and absorb mineral nutrients from soil.
Roots anchor plants and absorb mineral nutrients from soil.
Copyright Pearson Prentice Hall
Stems.
Plant Anatomy
Roots anchor plants and absorb mineral nutrients from soil.
Plant Structure and Function
Applied Biology Plant Review.
Plant Structures Roots, Stems, and Leaves
Horticulture Science Lesson 8 Understanding Stem Anatomy
Horticulture Science Lesson 8 Understanding Stem Anatomy
Primary and Secondary Growth in Plants
Roots anchor plants and absorb mineral nutrients from soil.
Presentation transcript:

Skeletal System of the Plant World Stems Skeletal System of the Plant World

Stem Functions Support leaves Transportation of water, nutrients, carbohydrates Storage – water or starch in parenchyma of cortex Protection – thorns, thick bark Photosynthesis – green stems Differences between species are adaptations to environment.

Stem Structure Nodes – points of 1 or more leaf attachment Internodes – segments between nodes Node usually also has 1 or more lateral buds Tip of stem has terminal bud Bud – contains apical meristem covered by bud scales that leave scars when bud opens Stem Structure

Specialized Stems Stolons – horizontal, above ground (“runners” of strawberry plants) – spread to form new plants Tubers – storage of starch (potatoes) Rhizomes – horizontal underground stems – also spread to form new plants Cacti – storage of water, photosynthesis

Stem Growth Gymnosperms & Dicots Primary – from apical meristems when bud opens. Secondary – from lateral meristems In woody plants: Vascular cambium in vascular bundles eventually unites to form vascular cylinder. Secondary xylem (wood) forms toward inside, secondary phloem toward outside. Stem Growth Gymnosperms & Dicots

Woody Stem in Cross-section Older xylem gets clogged, darker = heartwood Functional light-colored wood = sapwood Bark = cork, cork cambium, & phloem Woody Stem in Cross-section

Woody Stem in Cross-section Springwood = wide, thin-walled xylem produced in spring when water is plentiful. Summerwood = narrower, thick-walled xylem produced in summer when less water is available. Production ceases when photosynthesis slows/stops for winter. Annual ring/growth ring = 1 year’s xylem consisting of a layer of springwood and a layer of summerwood. (absent where water is abundant year-round).

Transportation within Stem Translocation = Carbohydrates moved from source (where made or have been stored) to sink (where used or to be stored). Pressure-flow hypothesis – carbohydrate movement Cohesion-tension theory – water movement

Pressure-Flow Hypothesis Carbs move into sieve tubes of phloem Water follows via osmosis (why?) Pressure builds at source Process reversed at sink Dissolved carbs move from high pressure to low pressure. https://www.youtube.com/watch?v=-b6dvKgWBVY https://www.youtube.com/watch?v=bsY8j8f54I0 https://www.youtube.com/watch?v=KHUrQ6qKpxQ https://www.youtube.com/watch?v=-I8ZijaOX9M https://www.youtube.com/watch?v=e8RtpC5RgbI

Cohesion-tension Theory Transpiration - Water constantly evaporating through leaves. Roots drawing in water create high pressure. Transpiration creates low pressure at leaves, tension on water column. Water pulled through xylem by polar water molecules’ attraction to each other (cohesion) Attraction of water molecules to xylem walls = adhesion, keeps water column from breaking. Combination of these results in upward movement https://www.youtube.com/watch?v=FTrFKPaOpm8 https://www.youtube.com/watch?v=mc9gUm1mMzc https://www.youtube.com/watch?v=BickMFHAZR0 https://www.youtube.com/watch?v=t14KGGWtn4M Cohesion-tension Theory

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2024 SlidePlayer.com Inc. All rights reserved.