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Lateral Transport of Organic and Inorganic Solutes

Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, 78000 Versailles, France
Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, 90183 Umeå, Sweden
Author to whom correspondence should be addressed.
Plants 2019, 8(1), 20;
Received: 14 November 2018 / Revised: 10 January 2019 / Accepted: 11 January 2019 / Published: 15 January 2019
(This article belongs to the Special Issue Plant Phloem Development)
Organic (e.g., sugars and amino acids) and inorganic (e.g., K+, Na+, PO42−, and SO42−) solutes are transported long-distance throughout plants. Lateral movement of these compounds between the xylem and the phloem, and vice versa, has also been reported in several plant species since the 1930s, and is believed to be important in the overall resource allocation. Studies of Arabidopsis thaliana have provided us with a better knowledge of the anatomical framework in which the lateral transport takes place, and have highlighted the role of specialized vascular and perivascular cells as an interface for solute exchanges. Important breakthroughs have also been made, mainly in Arabidopsis, in identifying some of the proteins involved in the cell-to-cell translocation of solutes, most notably a range of plasma membrane transporters that act in different cell types. Finally, in the future, state-of-art imaging techniques should help to better characterize the lateral transport of these compounds on a cellular level. This review brings the lateral transport of sugars and inorganic solutes back into focus and highlights its importance in terms of our overall understanding of plant resource allocation. View Full-Text
Keywords: phloem; xylem; lateral transport; organic solutes; inorganic solutes phloem; xylem; lateral transport; organic solutes; inorganic solutes
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MDPI and ACS Style

Aubry, E.; Dinant, S.; Vilaine, F.; Bellini, C.; Le Hir, R. Lateral Transport of Organic and Inorganic Solutes. Plants 2019, 8, 20.

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