%0 Journal Article %T Symplastic Continuity between Companion Cells and the Translocation Stream: Long-Distance Transport Is Controlled by Retention and Retrieval Mechanisms in the Phloem %A Ayre, Brian G. %A Keller, Felix %A Turgeon, Robert %J Plant Physiology %V 131 %N 4 %P 1518-1528 %@ 0032-0889 %D 2003-04-01 %I American Society of Plant Biologists %~ DeepDyve