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01126282010learningguide - • Familiarize yourself with...

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Learning guide for text that you should read for lecture on January 26 & 28 After reading Chapter 37 ( pp. 764-784) in the Campbell text, you should be able to address the following objectives and questions: Familiarize yourself with the proton pump (ATPase) and its importance in an array of cellular functions relating to water as well as nutrient uptake. Make sure you are comfortable with the concept of water potential and its components, pressure and solute (osmotic) potential. What are aquaporins, and what is their importance to plant water relations? How does the symplast interact with the apoplast with respect to water?
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Unformatted text preview: • Familiarize yourself with the key components of the Cohesion-Tension Theory for the ascent of sap (xylem water) in plants. • Can apoplastic water potential ever be greater than 0? • How is root pressure generated, and what is the role of the endodermis in this process? • Explain the biochemistry underlying stomatal opening. • Review the structure of primary phloem. • What are the two pathways for loading sucrose into the phloem? Be sure to highlight involvement of a proton pump in this process. • Be prepared to explain, using diagrams, the mechanism underlying long-distance sugar transport in the phloem....
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