The Molecular Link Between Auxin and ROS-Mediated Polar Root Hair Growth
March 2017
in “
bioRxiv (Cold Spring Harbor Laboratory)
”
TLDR Plant root hair growth is controlled by the hormone auxin, which affects the production of certain oxygen-related molecules through a specific process.
The study from March 14, 2017, revealed that root hair polar growth in plants is regulated by the hormone auxin, which influences the production of reactive oxygen species (ROS) through a molecular pathway. The transcription factors RSL4 are activated by auxin via Auxin Responsive Factors (ARFs), leading to the upregulation of genes that encode for NADPH oxidases (RBOHs) and Class-III Peroxidases (PER), enzymes responsible for ROS production. This process is crucial for root hair cell elongation, as chemical or genetic disruptions in ROS balance or peroxidase activity can affect the final cell size of root hairs. The findings provide a molecular link between auxin signaling, ARFs-RSL4 regulation, and ROS-mediated polar growth in root hairs, which is essential for plant survival due to the significant expansion of root hairs in response to external signals.
