Molecular link between auxin and ROS-mediated polar growth

• DOI: 10.1073/pnas.1701536114
• Publication Date: 2017-05-02T00:30:25Z
• Authors: Silvina Mangano; Silvina Paola Den...; Hee-Seung Choi; Eliana Marzol; Youra Hwang; Philippe Ranocha; Silvia Melina Vel...; Cecilia Borassi; María Laura Barbe...; Ariel Alejandro A...; Jorge Prometeo Mu...; Alejandro Daniel ...; Christophe Dunand; Hyung-Taeg Cho; José Manuel Estevez
• Keywords: Root hair

Root hair polar growth is endogenously controlled by auxin and sustained oscillating levels of reactive oxygen species (ROS). These cells extend several hundred-fold their original size toward signals important for plant survival. Although final cell fundamental importance, the molecular mechanisms that control it remain largely unknown. Here we show ROS production transcription factor RSL4, which in turn transcriptionally regulated through response factors (ARFs). In this manner, controls ROS-mediated activating then up-regulates expression genes encoding NADPH oxidases (also known as RESPIRATORY BURST OXIDASE HOMOLOG proteins) class III peroxidases, catalyze production. Chemical or genetic interference with balance peroxidase activity affects root size. Overall, our findings establish a link between growth.