transport in plants. plants require: co 2 light o2o2 h2oh2o minerals macronutrients (besides c, h,...
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Transport in Plants
Plants require:
CO2
Light
O2
H2O
Minerals
Macronutrients (besides C, H, O) Ca, K, Mg, N, P, S
Micronutrients B, Cl, Cu, Fe, Mn, Mo, Ni, Zn
Sugar
Water goes up the Xylem
From root To leaf then Transpires
Sugar madeIn the leaf
Goes down The Phloem
How do roots absorb water and minerals?
How does xylem transport xylem sap?
Nearly all of the energy to drive
the process comes from the
sun
Unbroken chains of water
molecules fill xylem vessels
Evaporation at the top
pulls water up from the
bottom
How does xylem transport xylem sap?
Water vapor escapes through stomata
How does phloem transport phloem sap?
Food (sugars) are then moved from leaves to the rest of the plant
Not all herbivores chew leaves…Some exploit sap
E.g., aphids tap sieve-tube
elements for phloem sap
Summary
• Xylem is
H/W
• P97• Q 3,5,7,8.
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