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Slide set 17 and 18

Autotrophic Organisms

Derive nutrition from inorganic substances in earths crust

Heterotrophic Organisms

Derive nutrients from other living organisms


Required in relatively large quantity by plants

Carbon, Hydrogen, Oxygen, Phosphorus, Potassium, Nitrogen, Sulfur, Calcium, Iron, and Magnesium



Required in relatively small quantity by plants


molecule with positive charge


molecule with negative charge

Exchangeable Form

Ion weakly associated with soil particle having the opposite charge.

Hydroponic Culture

plants grown in liquid culture

Aeroponic Culture

plants grown in air

Solid Media

Plants grown in sand, vermiculite, or perlite


Nitrogen deficiency


Death of tissue


Insufficent water available to maintain turgor pressure


Plasma membrane pulls away from cell wall

Turgid cells

sufficient water to maintain turgor pressure

Solute Potential

number of solutes disolved in water, decreases water potential

Pressure potential

Turgor pressure, increases water potential

Biotic pathway

Transport through cells

Abiotic pathway

Transport between cells

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