Botany 431 - Physiological Plant Ecology

At the end of your study this week, you should be able to achieve the objectives listed below. You must assemble the evidence that you have achieved these learning outcomes into your Portfolio. You should provide evidence that would be regarded as performance at the top two levels of Biggs' SOLO Taxonomy.

The material in your Portfolio will be assessed as Project 1.

If you wish to discuss this material informally with your peers, you can interact in Esme's Coffee Shop.

You can also challenge your peers by posting questions for them to respond to on the Student Quiz Board.

Week Two - Learning Objectives

When you have completed this section you will be able to:

  1. Recall from Botany 240 the thermodynamic basis for defining the chemical potential of water (Water Potential).

  2. Recall from Botany 240 the factors that may lower or raise the value of the water potential.

  3. Explain how a pressure chamber technique can be used to define the following parameters for plant tissues:
  4. Explain how therrmocouple psychrometers may be applied to the measurment of plant and soil water potentials.

  5. Explain how a pressure probe technique may be use to define the following parameters for plant tissues:

  6. Predict the numerical value of the relative water content (RWC) of tissue at full turgidity.

  7. What might you be able to predict about a plants habitat from a knowledge of the physical properties of its cell walls?

Supplemental Sources

Boyer. 1995. Pages 4-11.

Nobel. 1991. Pages 47-107.

Grace. In Crawley, 1997. Pages 28-37.

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