Notes
Slide Show
Outline
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Basic Parts of the Plant
  • Roots
  • Stems
  • Leaves
  • Flower
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Roots
  • 1.  Anchor Plant
  • 2.  Absorb water and minerals
  • 3.  Translocate water and minerals to stem
  • 4.  Store Food
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Stems
  • 1.  Translocate water, minerals and food to the leaves
  • 2.  Support the leaves and display them to light
  • 3.  Store Food
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Leaves
  • 1.  Make food through photosynthesis
  • 2.  Provide site of gas exchange
  • 3.  Store food
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Flowers
  • 1.   Contain organs for specialized sexual production
  • 2.  Produce seeds and fruit
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Different type of Roots
  • A.  Tap Root
    • Continuation of the primary root
    • Ideal for anchorage
    • Penetration is greater for water
    • Storage area for food made by photosynthesis
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Different type of Roots
  • B.  Fibrous Roots
    • Many finely branched secondary roots
    • Shallow roots cover a large area
      • More effective absorption of water and minerals
      • Roots hold the soil to prevent erosion
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Different type of Roots
  • C.  Aerial roots
    • Clinging air roots
      • Short roots that grow horizontally from the stems
      • Roots that fasten the plant to a support
    • Absorptive air roots
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Different type of Roots
  • Adventitious Roots
    • Develop in places other than nodes
    • Can form on cuttings and rhizomes
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Roots
  • Root hairs:
    • Tiny one celled hair like extensions of the epidermal cells located near the tips of the roots where vascular tissues have formed.
    • Increase surface area
    • Absorb water and minerals from soil
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Specialized Stems
  • A.  Corm (gladiolus, crocus)
    •  underground
    • Solid, fleshy, scale covered
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Specialized Stems
  • B.  Bulb (tulips, lillies, onions)
    • Layers of fleshy scales that overlap each other
    • Underground stem
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Specialized Stems
  • C.  Tuber (potato, caladium)
    • Food storage area
    • Short, thick underground stem
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Specialized Stems
  • F.  Rhizomes (iris, lily of the valley)
    • Underground stems that produce roots on the lower surface and extend leaves and flower shoots above the ground
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Specialized Stems
  • G.  Stolon (Strawberry, airplane plant)
    • Stem that grows horizontally above the soil surface


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Principal Tissues of the Leaf
  • Epidermis
    • Cuticle
      • Waxy substance covers the leaves and stems
      • Waterproof layer that keeps water in plants
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Principal Tissues of the Leaf
  • Epidermis (cont)
    • Stomata
      • Openings in the epidermis mainly located on underside of leaves
      • Exchange of gases
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Principal Tissues of the Leaf
  • Epidermis (cont)
    • Guard Cells
      • Two cells located on each side of stomata
      • Open and closes stomata
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Principal Tissues of the Leaf
  • Mesophyll layer
    • Palisade mesophyll
      • Primary site of photosynthesis


    • Spongy mesophyll
      • Contains air and chloroplasts
      • Site of photosynthesis and gas exchange
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Principal Tissues of the Leaf
  • Veins or vascular bundles
    • In spongy mesophyll
    • Phloem tissues conduct food from photosynthesis to rest of plant
    • Xylem tissues conduct water and minerals up to cells in leaves and stems