Subcellular trafficking and post-translational modification regulate PIN polarity in plants

Shuyang Cheng; Yizhou Wang

doi:10.3389/fpls.2022.923293

Subcellular trafficking and post-translational modification regulate PIN polarity in plants

Front Plant Sci. 2022 Jul 27:13:923293. doi: 10.3389/fpls.2022.923293. eCollection 2022.

Authors

Shuyang Cheng¹, Yizhou Wang^{1

2

3}

Affiliations

¹ Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China.
² Hainan Yazhou Bay Seed Laboratory, Sanya, China.
³ Zhejiang Provincial Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, China.

Abstract

Auxin regulates plant growth and tropism responses. As a phytohormone, auxin is transported between its synthesis sites and action sites. Most natural auxin moves between cells via a polar transport system that is mediated by PIN-FORMED (PIN) auxin exporters. The asymmetrically localized PINs usually determine the directionality of intercellular auxin flow. Different internal cues and external stimuli modulate PIN polar distribution and activity at multiple levels, including transcription, protein stability, subcellular trafficking, and post-translational modification, and thereby regulate auxin-distribution-dependent development. Thus, the different regulation levels of PIN polarity constitute a complex network. For example, the post-translational modification of PINs can affect the subcellular trafficking of PINs. In this review, we focus on subcellular trafficking and post-translational modification of PINs to summarize recent progress in understanding PIN polarity.

Keywords: PINs; auxin transport; polarity; post-translational modification; subcellular trafficing.

Publication types

Review