research D’orenone Blocks Polarized Tip Growth Of Root Hairs By Interfering With The PIN2-Mediated Auxin Transport Network In The Root Apex 44 citations, August 2008 in “Plant journal” D'orenone stops root hair growth by disrupting auxin transport, but adding auxin can reverse this.
research Auxin And Ethylene: Collaborators Or Competitors? 356 citations, March 2012 in “Trends in Plant Science” Auxin and ethylene hormones both work together and against each other to control plant growth.