Plant Sucrose Transporters from a Biophysical Point of View |
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Authors: | Dietmar Geiger |
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Affiliation: | Julius-von-Sachs Institute, Molecular Plant Physiology and Biophysics, University Wurzburg, Julius-von-Sachs Platz 2, D-97082 Wurzburg, Germany |
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Abstract: | T The majority of higher plants use sucrose as their main mobile carbohydrate. Proton-driven sucrose transporters play a crucial role in cell-to-cell and long-distance distribution of sucrose throughout the plant. A very negative plant membrane potential and the ability of sucrose transporters to accumulate sucrose concentrations of more than 1 M indicate that plants evolved transporters with unique structural and functional features. The knowledge about the transport mechanism and structural/functional domains of these nano-machines is, however, still fragmentary. In this review,the current knowledge about the biophysical properties of plant sucrose transporters is summarized and discussed. |
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Keywords: | Biophysics electrophysiology transport processes/kinetics phloem physiology phloem unloading sucrose transport |
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