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Curr Opin Plant Biol. 2005 Oct;8(5):494-500.

Auxin transport.

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1
Department of Horticulture, Purdue University, West Lafayette, Indiana 47907, USA.

Abstract

Polar transport of auxin is essential for normal plant growth and development. On a cellular level, directional auxin transport is primarily controlled by an efflux carrier complex that is characterized by the PIN-FORMED (PIN) family of proteins. Detailed developmental studies of PIN distribution and subcellular localization have been combined with the analysis of changes in localized auxin levels to map PIN-mediated auxin movement throughout Arabidopsis tissues. Plant orthologs of mammalian multidrug-resistance/P-glycoproteins (MDR/PGPs) also function in auxin efflux. MDR/PGPs appear to stabilize efflux complexes on the plasma membrane and to function as ATP-dependent auxin transporters, with the specificity and directionality of transport being provided by interacting PIN proteins.

PMID:
16054428
DOI:
10.1016/j.pbi.2005.07.014
[Indexed for MEDLINE]
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