Transport in Angiosperms9.2 part 1
Roots  A. Plants take in water and minerals through their roots  B. Roots have large surface area to allow for adequate up...
 Zone of maturation: cells  differentiate into different types of  cells Zone of elongation: allows the  root to get dee...
Roots and active transportA. Mineral concentrations are often higher in the root than in  the soil  B. This suggests activ...
Water Uptake By RootsRoots take in water via osmosis       -Water in the soil contains a lower       concentration of solu...
Water Uptake by Roots                     Root cell        Soil                  High solute    Low solute                ...
Water Uptake By Roots (continued)Most absorbed water is eventually drawn to the rest of the plant because of transpiration...
Apoplast pathway-water does not enter the root cells  -it travels by capillary action through the cell walls  of the corte...
Symplast Pathway-water enters the cytoplasm of the cells, but not thevacuole-water passes from cell to cell via the plasmo...
Movement Through Roots
Assignment: (in notebook)Make a chart to compare apoplast    and symplast pathways
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9.2 transport- part1

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9.2 transport- part1

  1. 1. Transport in Angiosperms9.2 part 1
  2. 2. Roots A. Plants take in water and minerals through their roots B. Roots have large surface area to allow for adequate uptake of water and minerals -they are branched and they have root hairs C. Function of the cortex=to facilitate water uptake D. Roots also act as anchorage to ground
  3. 3.  Zone of maturation: cells differentiate into different types of cells Zone of elongation: allows the root to get deeper within the soil Meristematic region: rapid mitosis of undifferentiated meristematic cells Root cap: protects the meristematic region
  4. 4. Roots and active transportA. Mineral concentrations are often higher in the root than in the soil B. This suggests active transport (going against the concentration gradient) C. Cortex cells can absorb ions that are dissolved in the water that is drawn by capillary action through the cortex cell walls
  5. 5. Water Uptake By RootsRoots take in water via osmosis -Water in the soil contains a lower concentration of solutes than the cytoplasm of root cells -This causes water to diffuse in to the roots
  6. 6. Water Uptake by Roots Root cell Soil High solute Low solute H2O H2O**Water diffuses (osmosis) to an area of high solute concentrationto reach equilibrium between the roots and the soil**Minerals are taken in via active transport because the rootshave higher solute concentration than the soil
  7. 7. Water Uptake By Roots (continued)Most absorbed water is eventually drawn to the rest of the plant because of transpiration -as water exits the leaves it must be replacedTo get water from the root hairs to the xylem, there are two possible methods-apoplast or symplast
  8. 8. Apoplast pathway-water does not enter the root cells -it travels by capillary action through the cell walls of the cortex until it reaches the endodermis -cells of the endodermis have Casparian strips around them that are impermeable to water -to pass through the endodermis the water must follow the symplast pathway (the apoplast pathway stops at the endodermis)
  9. 9. Symplast Pathway-water enters the cytoplasm of the cells, but not thevacuole-water passes from cell to cell via the plasmodesmata(connections of cytoplasm between cells)-the water eventually enters the xylem
  10. 10. Movement Through Roots
  11. 11. Assignment: (in notebook)Make a chart to compare apoplast and symplast pathways

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