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Ch.8 Structure of Woody Plants, image, https://haygot.s3.amazonaws…

- - - - vascular cambium cells
      - divide longitudinally
      - increase cambium cells
      - prevents not functioning
  - - - meristem
      - produce secondary body
    - - cells continue to divide
      - do not mature
    - - out of cell cycle arrest
      - resume mitosis
- - - - first wood formed
      - high proportion of wide vessels
      - spring
    - - summer
      - low proportion of wide vessels
    - - early & late wood
      - 1 years growth
    - - wood of growth ring
      - vessels through it
    - - vessels restricted to early wood
  - - - lighter, moist, outer
    - - dark wood
    - - plug for vessel
  - - - develops from fusiform initials
    - - originates from ray initials
    - - interior to vascular cambium
    - - few or no fibers
      - softer consistency
    - - upright cells
        
        direct connection with axial
      - procumbent cells
        
        no direct connection with axial
    - - Horizontal, rectangular cells
- - - - cork cambium produce a cell inside
      - mature into a layer of parenchyma
    - - cork cambium
      - layers of cork cells
      - phelloderm
    - - phellem cell
      - outer cell differentiates into
    - - all tissues outside innermost cork cambium
    - - Secondary phloem
        
        new cambium
    - - all secondary phloem
      - between vascular cambium & innermost cork
  - - - regions of aerenchymatous cork
- - - - located between 2 bands of xylem
  - - - undergo rapid division & produce
  - - - form of primary growth
      - increase width & add adventitious roots