Plant Physiology (Biology 327)
- Dr. Stephen G. Saupe; College of St. Benedict/ St.
University; Biology Department; Collegeville, MN 56321; (320) 363 - 2782;
(320) 363 - 3202, fax;
Exam Essay Questions: Phloem Transport
- Describe the phloem. Include a discussion of the materials transported,
rate of transport, anatomy, and p-protein. Explain how aphids helped to
learn about phloem function and why is phloem transport is difficult to
- Explain the mechanism by which solutes are
transported in the phloem. Include a discussion of the Pressure-Flow
hypothesis and its analogy to a double osmometer.
- Explain how solutes are loaded/unloaded in the
phloem (via apoplastic and/or symplastic transport). Include H+-ATPase,
K+, sucrose/H+ co-transport in your response.
01/07/2009 � Copyright by SG