Contribution of sucrose transporters to phloem unloading within Sorghum bicolor stem internodes

Ricky J. Milne, Anke Reinders, John M. Ward, Christina E. Offler, John W. Patrick, Christopher P.L. Grof

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1 Scopus citations

Abstract

Sucrose produced in source leaves is loaded into collection phloem, transported to sinks and unloaded for utilization or storage. In the context of long distance transport, sucrose transporters (SUTs) can function to load sucrose into collection phloem, retrieve leaked sucrose during long distance transport, and load sucrose into sink cells. SUTs have also been proposed to efflux sucrose under conditions of low proton motive force and low extracellular sucrose. The involvement of sucrose transporters in phloem unloading in a representative monocot stem, Sorghum bicolor, was evaluated during different stages of internode development. Transcript levels and functional properties of selected key transporters were measured, with both cellular and subcellular localization determined.

Original languageEnglish (US)
Article numbere1319030
JournalPlant Signaling and Behavior
Volume12
Issue number5
DOIs
StatePublished - May 4 2017

Bibliographical note

Publisher Copyright:
© 2017 The Author(s). Published with license by Taylor & Francis Group, LLC © 2017, © Ricky J. Milne, Anke Reinders, John M. Ward, Christina E. Offler, John W. Patrick, and Christopher P.L. Grof.

Keywords

  • Heterologous expression
  • Sorghum bicolor
  • phloem unloading pathway

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