sugar transport

sugar transport - Key Points : Sugar Translocation Phloem...

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4/7/11 Key Points : Sugar Translocation Phloem moves through special cells via the Pressure-Flow Hypothesis based on water potential differences Sucrose movement during Phloem Loading and sometimes in Phloem Unloading is due
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4/7/11 What is Translocation?
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4/7/11 Fig 37.14
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4/7/11 What are the two cells that make up  phloem? Sieve-tube members : connected end-to-end by pores ( Sieve plates) , directly linking the cytoplasm of cells (lack organelles). Companion cells : have organelles; maintain cytoplasm and plasma membrane of Sieve Tube Members.
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4/7/11
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4/7/11 Sieve-tube cell Companion cell
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4/7/11 FIG 37.16
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4/7/11 How does phloem move in a plant? Water Potential changes and High Turgor pressure near sources causes phloem sap to flow to sinks. How does pressure vary between the Source and Sink cells in the Pressure- Flow Hypothesis?
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4/7/11 Pressure - Flow Hypothesis Phloem loading near HIGH TURGOR PRESSURE at source Phloem unloading near sink , H2O Potential LOW TURGOR PRESSURE at sink Fig
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This note was uploaded on 04/06/2011 for the course BIO 101 taught by Professor Freeman during the Spring '11 term at Union.

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sugar transport - Key Points : Sugar Translocation Phloem...

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