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Plant Structure and Function. Is It a Stem, Leaf, Root, Flower, Fruit or Seed?. Plant Body. Shoot system = leaves + stem Root system Meristem = cells that divide for life of plant, can give rise to all plant structures. Three Types of Plant Tissues. Vascular Tissue Transport Support

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Presentation Transcript
plant body
Plant Body
  • Shoot system = leaves + stem
  • Root system
  • Meristem = cells that divide for life of plant, can give rise to all plant structures
three types of plant tissues
Three Types of Plant Tissues
  • Vascular Tissue
    • Transport
    • Support
  • Ground Tissue
    • Synthesis of Sugars
    • Storage
    • Support
  • Dermal Tissue
    • Protection
division of meristem cells causes plant growth
Division of Meristem Cells Causes Plant Growth
  • Apical Meristem
    • tips of root and shoot
    • increase in height
  • Lateral Meristem
    • cylinders within plant body
    • increase in width
plant body1

Blade

Petiole

Plant Body

Leaf = blade + petiole

Functions

Exposes surface to sunlightMajor site of photosynthesisConserves waterProvides for gas exchange

Stoma = opening in the leaf for gas exchange, water evaporation

structures of the leaf

Conserves water

Structures of the Leaf

Photosynthesis

Transports water and sugar to stem and roots

plant body2

Xylem conducts water

and minerals

Phloem transports sugar

Plant Body

Stem: series of nodes and internodes

Functions

Holds leaves up to light

Transports substances through vascular tissue

plant body3
Plant Body

Root

Functions

Anchors plant in soil

Takes up water and minerals from soil

applying your knowledge
Applying Your Knowledge
  • Apical Meristem
  • Vascular Tissue
  • Stem
  • Leaf
  • Lateral Meristem
  • Where is the primary site of photosynthesis in a plant?
  • Which one is responsible for an increase in plant height?
  • Which one transports materials throughout the plant?
flowering plant reproduction

Flower

Mitosis

Meiosis

Mitosis

Pollengrains

Ovule

Flowering Plant Reproduction
  • Flowers are modified leaves, specialized for reproduction.
  • Flower parts undergo meiosis to produce haploid products
    • pollen grain
    • ovule (contains egg cell)
a complete flower has both male and female parts

Stamen

Pistil

Male part

Produces pollen

A Complete Flower Has Both Male and Female Parts

Anther

Attracts pollinator

Filament

Stigma

Petal

Style

Sepal

Ovary

Encloses and Protects Bud

Female part

Produces egg

pollination and fertilization in a flower

Mature PollenGrain

Pollination andFertilization in a Flower

Sperm Cells

Tube Cell Nucleus

1. pollen grainsland on stigma

3B: Fusion of 2ndsperm + twopolar nuclei

2. pollen tubes growdown stigma to ovary

Stigma

3. doublefertilization

Style

Sperm

3A: Fusion ofsperm + egg

Ovule

Polar nuclei

Ovary

Egg

development of fruit and seeds from flower parts
Development of Fruit and SeedsFrom Flower Parts

Provides nutrition

Endosperm

Triploid

Endosperm

Cell

FreshFruit

Ovary

SeedCoat

Integument

DiploidZygote

Embryo(new plant)

  • Seed = embryo + stored food + seed coat
  • Fruit = ovary wall, mechanism for seed dispersal
applying your knowledge1
Applying Your Knowledge
  • Seed
  • Fruit
  • Pistil
  • Anther
  • Pollen
  • Which one develops from the ovary wall?
  • Which one produces pollen?
  • Which one develops from a fertilized ovule?
  • What is the name of the female part of the flower?