Transport in plants

• What tissues are there in a plant

  • Epidermis
  • Palisade mesophyll
  • Spongy mesophyss
  • Xylem vessels
  • Phloem vessels
  • Mertistem tissue
• What does the Epidermis function?


  Covers the outer surface of the plant for protection
• What does the Palisade mesophyll function?

  Photosynthesis
• What does the spongy mesophyll function?

  Air spaces between the cell allow gases to diffuse through the leaf
• What does the xylem vessel function?

  Transports water and minerals through the plant and support the plants
• What does the phloem vessel function?

  Transports dissolved food minerals through the plant
• What does the meristem tissue function?

  Found mainly at the tips of the roots and shoots, where it can produce new cell for growth
• What does plant cells gather together form?

  Organs
• Water transport

  • Water enters the plant from the soil, through the root hair cells, by osmosis.
  • Root hair, xylem and phloem cells are specialised to transport Water, minerals and sugar around thr plant
  • At the leaves, most of the water will evaporate and diffuse out of the stomata.
• The loss of Water from the leaves are called?

  Transpiration
• Factors that are effected by the rate of transpiration

  • An increase in temperature will increase the rate, as more energy is transferred to the water to allow it to evaporate
  • Faster sir flow will increase the rate, as it will blow away water vapour allowing more to evaporate
  • Increase light intesting will increase the  rate, as it will cause stoma to open
• How does an increase temperature effect by the rate of transpiration?

  More energy is transferred to the water to allow it to evaporate
• How does faster air flow effect by the rate of transpiration?

  As it will blow away water vapour allowing more to evaporate
• How does increase in light intensity effect by the rate of transpiration?

  As it will cause the stoma to open
• An increase in humanity will decrease effect by the rate of transpiration?

  As the air contains more water vapour, so the concentration gradient for diffuse is lower.
• Translocation

  • Phloem tissue transport dissolved sugar from thr leaves to the rest of the plant
  • This movement of food through phloem tissue is called Translocation
  • Phloem cells are adapted for this function