Abstract
Polar transport of the phytohormone auxin is mediated by plasma-membrane and endosome localized carrier proteins. PIN proteins are the best studied auxin efflux components implicated in the establishment of the auxin gradient required for growth and patterning in plants. Emerging models postulate a role for vesicular trafficking and protein phosphorylation and dephosphorylation in the regulation of PIN protein subcellular localization and auxin transport activity, providing a conceptual framework for our understanding of auxin transport and its role in plant development.
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Acknowledgments
RC would like to thank Jeffery Long (Salk), Ben Scheres, and Jian Xu (Utrecht University) for providing the PIN1-eGFP and PIN2-eGFP lines, respectively. We thank Dr. Jozef Samaj for comments on the manuscript. Research was supported by a startup fund from the Noble Foundation to RC, and by NSF, NASA, and HATCH funds to PHM.
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Chen, R., Masson, P.H. Auxin Transport and Recycling of PIN Proteins in Plants. In: Šamaj, J., Baluška, F., Menzel, D. (eds) Plant Endocytosis. Plant Cell Monographs, vol 1. Springer, Berlin, Heidelberg. https://doi.org/10.1007/7089_009
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