Chinese Bulletin of Botany

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Plasma Membrane Positioning Mechanism of Auxin Efflux Carrier PIN Proteins

Wenjie Cao, Guisheng Li*   

  1. Plant Rescources Protection and Utilization Hunan Province College Key Laboratory, Jishou University, Jishou 416000, China
  • Received:2016-01-25 Revised:2016-02-01 Online:2016-03-01 Published:2016-03-31
  • Contact: Guisheng Li

Abstract: Auxin concentration affects the morphological establishment of plant body and its organs, while PIN (PINFORMED) proteins determine the direction of auxin stream within tissues. The nature of lipid rafts of cellular plasma membrane underlies the uneven distribution of PINs in the plasma membrane. Meanwhile, clathrin-mediated endocytyosis, proteins phosphorylation/dephosphorylation and even genes transcriptional regulation affect this polar location of PINs. Additionally, at the time when multicellular plants emerge, PINs may undergo a transition from endoplasmic reticulum membrane to plasma membrane positioning.