Plants: Transport and Nutrition

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PlantsTransport and Nutrition
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3 levels of plant transport

• 1) uptake and loss of water and solutes by
  individual cells
• 2) short distance transport of substances from
  cell to cell at level of tissues and organs
• 3) long distance transport of sap within xylem
  and phloem for whole plant

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Figure 36.1 An overview of transport in whole
plants (Layer 4)
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Figure 36.4 Water relations of plant cells
Key words Flaccid cells Turgid
cells Plasmolysis Turgor pressure
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Figure 36.5 A watered tomato plant regains its
turgor
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Transpiration,Root pressure, and guttation

• Transpiration loss of water vapor from leaves
  and other aerial part of the plant
• Root pressure upward push of xylem sap
• major forces in transpiration are cohesion and
  adhesion of water

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Figure 36.13b The mechanism of stomatal opening
and closing
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Translocation

• Transport of food in a plant
• Source-sink movement

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Plant Nutrition

• Macronutrients 9 of them
• C, H, N, O, P, S and K, Ca, Mg
• Micronutrients 8 of them
• Fe, Cl, Cu, Mn, Zn, Molybdenum, B, Ni

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Figure 37.1 The uptake of nutrients by a plant
an overview