plant cell structure

• cell wall

  • structural support
  • made from polysaccharide cellulose
• middle lamella

  • outer most layer of plant
  • sticks adjacent plant cells together
  • provides stability
• chloroplasts

  • contain stacks of thylakoid membrane called grana- containing chlorophyll
  • grana joined by lamaella(think thylakoid membranes)
  • grana surrounded by stroma(colourless liquid w enzymes for photosynthesis
  • bound by double membrane(envelope)
• amyloplasts

  • contain starch granules
  • store starch and convert it to glucose
• plasmodesmata

  • extension of cytoplasm which connects neighbouring cells
  • allows the transport of substances and cell to cell communication
• pits

  • thin regions of cell wall
  • allows communication and facillitates transportation of substances cell to cell
• vacuole

  • surrounded by tonoplast- controls movement in and out of vacuole
  • contain cell sap,water,minerals ect
  • keep cells turgid and stop wilting