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Root Pressure Evidence Role Active Transport Energy Describe

Active transport in the root is supported by the disappearance of root pressure when mitochondria are poisoned, the increase of root pressure with temperature, and the decrease in root pressure with reduced oxygen or respiratory substrates.

El transporte activo en la raíz está respaldado por la desaparición de la presión radicular cuando se envenenan las mitocondrias, el aumento de la presión radicular con la temperatura y la disminución de la presión radicular con la reducción de oxígeno o sustratos respiratorios.

Front Describe evidence for role of active transport in moving water from root endodermis into xylem.
Back Evidence for role of active transport in root pressure:
  • Poisons - affect mitochondria, prevent ATP production - root cells have no energy supply - root pressure disappears
  • Root pressure increases with rise in temp - suggests chemical reations involved
  • If levels of oxygen/respiratory substrates fall, root pressure falls - it relies on energy

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