[Curr Biol] Mechanochemical feedback mediates tissue bending required for seedling emergence

 • Asymmetric pectin methylesterification is required for differential growth
 • Auxin distribution regulates pectin methylesterification during differential growth
 • Feedback between pectin and auxin via PIN proteins facilitates growth asymmetry

 Auxin modulates cell elongation and mechanical properties during hook formation



 Asymmetric HG methylesterification is required for proper hook development