LS1 Lecture 5: Plant tissue and cells

  1. plant tissue
    Image Upload 1
  2. xylem
    vascular tissue that moves water through roots to leaves, dead upon maturity, composed of tracheids (found in vascular plants)
  3. phloem
    vascular tissue that moves sugar, alive upon maturity, composed of sieve tubes
  4. parenchyma
    • plant cell that are thin, flexible, leaf specialized
    • have a large central vacuole, involved in metabolic functions & photosynthesis
    • retain the ability to divide and differentiate into other cell types
  5. collenchyma
    • plant cell that are grouped into strands or cylinders, flexible, has a thicker wall
    • help to support a growing shoot & give it structure
  6. sclerenchyma
    • plant cell that has a primary wall & secondary wall (has a additional polymer called lignin)
    • sclereid cells that have short fibers that help to make the "hardness" in nuts and skins of fruits
  7. monocot roots
    vascular cylinder with a core of parenchyma surrounded by a ring of alternating xylem and phloem
  8. eudicot roots
    The stele is a vascular cynlinder consisting of a lobed core of xylem with phloem between the lobes
  9. Plants have __ growth
    un-determinate (does not stop growing)
  10. primary growth
    • growing lengthwise (longer)
    • From the apical meristem (totipotent cells), there is the zone of division (hyperplasia), zone of elongation (hypertrophy), and zone of maturation
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  11. root cap
    protects primary growth
  12. vascular cambium
    • divides the xylem from the phloem
    • composed of stem cells
    • (phloem on inside, xylem on outside)
  13. secondary growth
    • increasing in girth
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  14. monocot stems
    vascular bundles scattered throughout the ground tissue. Ground tissue is not partitioned into pith and cortex
  15. eudicot stems
    (sunflower) with vascular bundles forming a ring. Ground tissue toward the inside is called pith and ground tissue toward the outside is called cortex
  16. phase changes as meristem matures
    • doubly compound when young
    • simple leaves at adult phase
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  17. sepals
    • protects developing bud
    • gene A
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  18. petals
    • modified leaves that attract pollinators
    • gene A + B
    • Image Upload 6
  19. stamens
    • male parts (where pollen is located)
    • gene B + C
    • Image Upload 7
  20. carpels
    • female parts: includes stigma (where pollen sticks), style, and ovary
    • Multiple carpels are called pistils
    • gene C
    • Image Upload 8
  21. A mutant flower lacking gene A will lack __
    • sepals & petals
    • (will still have both male & female parts)
  22. A mutant flower lacking gene B will lack __
    petals & stamens (male parts)
  23. A mutant flower lacking gene C will lack __
    stamens & carpels (male & female parts)
Card Set
LS1 Lecture 5: Plant tissue and cells
Ch. 28, 29, 30