Journal
EMBO JOURNAL
Volume 29, Issue 16, Pages 2700-2714Publisher
WILEY
DOI: 10.1038/emboj.2010.181
Keywords
endocytosis; PIN proteins; polar auxin transport; recycling; trafficking
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Funding
- Ghent University
- Research Foundation-Flanders [G091608]
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Development of plants and their adaptive capacity towards ever-changing environmental conditions largely depend on the spatial distribution of the plant hormone auxin. At the cellular level, various internal and external signals are translated into specific changes in the polar, subcellular localization of auxin transporters from the PIN family thereby directing and redirecting the intercellular fluxes of auxin. The current model of polar targeting of PIN proteins towards different plasma membrane domains encompasses apolar secretion of newly synthesized PINs followed by endocytosis and recycling back to the plasma membrane in a polarized manner. In this review, we follow the subcellular march of the PINs and highlight the cellular and molecular mechanisms behind polar foraging and subcellular trafficking pathways. Also, the entry points for different signals and regulations including by auxin itself will be discussed within the context of morphological and developmental consequences of polar targeting and subcellular trafficking. The EMBO Journal (2010) 29, 2700-2714. doi:10.1038/emboj.2010.181
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