Plants

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Plants

  1. 1. Plants
  2. 2. Growth and Development Meristem: Undifferentiated cells that divide and differentiate rapidly. Germination: Growth from a seed to a seedling
  3. 3. Growth Growth Types  Growth in response  Primary to a stimulus  Secondary  Geotropism  Phototropism
  4. 4. Tissues Dermal Tissue: offers protection and prevents water loss  Epidermis Vascular Tissue: transportation of materials  Xylem and Phloem Ground Tissue: production and storage of sugars  Parenchyma: versatile with varying functions  Collenchyma: support structure  Sclerenchyma: support structure, cells are dead
  5. 5. Systems Root  Taproot vs fibrous Stem  Herbaceous vs woody Leaves
  6. 6. Root Systems
  7. 7. Herbaceous vs Woody
  8. 8. Transport Tissues Transports water up through Xylem: the roots to other parts of the plant.  Turgor Pressure Transports sap from the Phloem: photosynthetic parts of the plant (leaves) to the rest of the plant.
  9. 9. Transporting Water  Stomata-tiny openings on the leaf that allow gas exchange and water loss  Guard cells-open and close stomata for the sake of homeostasis  Transpiration: water lost through stomata causes a difference in pressure. This results in water being “sucked up” through the xylem.
  10. 10. Leaves Apex Veins Petiole Margin  Sinus
  11. 11. Leaves Cuticle: Waxy coat on the outside of the leaf Trichomes: Little “hairs” on the leaf
  12. 12. Leaves Continued Mesophyll-groundtissue in leaf. Where most photosynthesis in plants takes place.  Chlorophyll-pigment that causes green coloration  Chloroplasts-organelle unique to photosynthetic organisms which allows photosynthesis to occur
  13. 13. All ImagesCourtesy of Wikipedia http://en.wikipedia.org/wiki/Meristem http://en.wikipedia.org/wiki/Germination http://en.wikipedia.org/wiki/Tree_rings#Growth_rings http://en.wikipedia.org/wiki/Tree_rings#Growth_rings http://en.wikipedia.org/wiki/Fibrous_root_system http://en.wikipedia.org/wiki/Fibrous_root_system http://en.wikipedia.org/wiki/Tree http://en.wikipedia.org/wiki/Herbaceous_plant http://en.wikipedia.org/wiki/Stomata http://en.wikipedia.org/wiki/Leaf http://en.wikipedia.org/wiki/Corn

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