Fluctuating auxin response gradients determine pavement cell-shape acquisition

Peter Grones, Mateusz Majda, Siamsa M. Doyle, Daniël Van Damme, Stéphanie Robert*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

14 Citations (Scopus)


Puzzle-shaped pavement cells provide a powerful model system to investigate the cellular and subcellular processes underlying complex cell-shape determination in plants. To better understand pavement cell-shape acquisition and the role of auxin in this process, we focused on the spirals of young stomatal lineage ground cells of Arabidopsis leaf epidermis. The predictability of lobe formation in these cells allowed us to demonstrate that the auxin response gradient forms within the cells of the spiral and fluctuates based on the particular stage of lobe development. We revealed that specific localization of auxin transporters at the different membranes of these young cells changes during the course of lobe formation, suggesting that these fluctuating auxin response gradients are orchestrated via auxin transport to control lobe formation and determine pavement cell shape.

Original languageEnglish
Pages (from-to)16027-16034
Number of pages8
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number27
Publication statusPublished - 7 Jul 2020
Externally publishedYes


  • Arabidopsis
  • Auxin response gradient
  • Auxin transporter
  • Lobe formation
  • Pavement cells


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