Auxin and the developing root of Arabidopsis thaliana

The plant hormone auxin has long been known to play a crucial role in plant growth and development, but how it affects so many different processes has remained a mystery. Recent evidence from genetic and molecular studies has begun to reveal a possible mechanism for auxin action. In this article we will present an overview with specific emphasis on auxin's role in roots of Arabidopsis thaliana , focusing on cell division, elongation and differentiation.