1 Regulation of phyllotaxis by polar auxin transport Reinhardt D., et al. 2003 Presented by Alysha Torbiak November 18, 2005 Introduction • Auxin involved in embryogenesis, root development, vascular differentiation • In 2000, auxin shown to induce leaf and flower (organ) formation at the SAM • Auxin triggers organ initiation, does it play a role in determining organ position and thereby phyllotaxis?