Xylem and phloem structure (Other in-depth notes)

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  • Created by: dukk
  • Created on: 20-11-14 17:12

Xylem and phloem (Other in-depth notes)


 - Transports water and soluble minerals UP the plant from the roots 

What is it composed of?  

> Vessels

> Fibres

> Parenchyma

> Tracheid  (Yes, that’s the spelling)

> 1 - Vessels 

  •  It has lignin walls, which means they are dead.  Hence, they have no contents inside
  •  They are linked end-to-end which creates a continuous column with proliferation plates
  •  Contains pits/pores

> 2 - Tracheids

  •  These also contain lignin.  They are not found in the same plant as xylem vessels.  Xylem vessels are fatter and shorter.
  •  Linked end-to-end
  •  Sloped ends with pores/pits in them

> 3 - Fibres

 - The walls have lignin in 

 - Do not transport water and run along side the xylem vessel

 - It’s function is to act as support

> 4 - Parenchyma 

  •  They are actually living!  
  •  Provide turgidity, which is basically providing support
  •  Stores starch and minerals

So, some general points on structure - 

 - Continuous…


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