plants 2 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Plants 2 PowerPoint Presentation
Download Presentation
Plants 2

Loading in 2 Seconds...

play fullscreen
1 / 12

Plants 2 - PowerPoint PPT Presentation


  • 826 Views
  • Uploaded on

Plants 2 Read 422-464 Study for Test next class NR 4 due in a week(ish) Review: Gymnosperms: Mainly conifer trees, naked seeds, thick bark Eudicots (Angiosperms): Flowering plants, branched veins, 4/5 petals Monocots (Angiosperms): Flowering plants, parallel veins, 3 petals Defense

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Plants 2' - jana


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
plants 2

Plants 2

Read 422-464

Study for Test next class

NR 4 due in a week(ish)

review
Review:
  • Gymnosperms:
    • Mainly conifer trees, naked seeds, thick bark
  • Eudicots (Angiosperms):
    • Flowering plants, branched veins, 4/5 petals
  • Monocots (Angiosperms):
    • Flowering plants, parallel veins, 3 petals
defense
Defense
  • 4 major strategies for defense:
    • Chemical
    • Growth of non-essential structures
    • Encourage predation from other species
    • Mechanical
chemical and mechanical
Chemical and Mechanical
  • Production of non-essential organic compounds that do not aid in growth or reproduction of the plant.
    • toxins
  • Production of structures on leaves and stems discourage herbivores through injury or death.
    • Thorns, waxy coatings, poison spines, sap
mutualism
Mutualism
  • Some plants develop structures to house another species that will protect it from predators.
flower structure
Flower structure
  • A flower is a reproductive organ in angiosperm plants.
    • Considered a modified stem
    • Arranged in whorls (spiral patterns)
    • Whorls from outer to inner:
      • Sepals, petals, stamen, pistil
perfect flowers
Perfect flowers?
  • A flower is considered “perfect” if it has both a stamen and pistil.
    • These flowers are also known as bisexual or hermaphroditic.
  • If a flower is “imperfect” it may only contain male or female parts.
    • If both male and female parts are on the same plant (but different flowers)monoecious
    • Male and female flower parts are on different plants dioecious.
flowers are for reproduction
Flowers are for reproduction
  • The main purpose for flowers is to mediate the joining of pollen to ovary (sperm to ovule).
    • Pollination by insects and flower phenotype are adaptations to increase the likelihood of fertilization.
      • Many times, this coevolution can be seen having negative effects when one species or the other becomes endangered.
fruit
Fruit
  • A fruit is a ripened ovary and surrounding tissues.
    • A main way that plants spread seeds.
  • In cooking, many culinary vegetables are actually fruits:
    • Squash, pumpkin, cucumber, tomatoes, peas, beans, corn, eggplant, chilies, etc
  • Nuts are also types of fruit, but are often classified as edible seeds (peanuts, pistachios)
types of fruit
Types of fruit
  • 3 types of fruit:
    • Simple, aggregate, multiple
      • Simple: Comes from one pistil. (ex: avocado)
      • Aggregate: Comes from a flower with many pistils (ex: raspberry)
      • Multiple: multiple flowers that create one massive fruit (ex: pineapple)
  • Seedless fruit:
    • Caused by either breeding or because fruit is not a result of fertilization (plant reproduces via asexual means).
fruit anatomy
Fruit Anatomy
  • Exocarp- tough skin with oil glands and pigments
  • Mesocarp- The fleshy portion of the fruiting body.
  • Endocarp- The portion of the fruit that directly surrounds the seed.
  • Seed- The immature plant that will begin to grow under the right conditions.
plant hormones
Plant hormones
  • 5 major hormones:
    • Abscisic acid: (ABA) prevents leaf & stem growth.
    • Auxin: influence cell growth, bud formation, root initiation
    • Cytokinin: influence shoot formation
    • Ethylene: fruit ripening
    • Gibberellin: seedling growth, flowering, reverses ABA