Impacts of Iron on Phosphate Starvation-Induced Root Hair Growth in Arabidopsis
May 2021
TLDR Iron influences root hair growth during phosphate starvation by affecting auxin distribution and vesicle trafficking.
The study investigated the role of iron (Fe) in phosphate starvation-induced root hair growth (RHG) in Arabidopsis. It was found that local Fe availability influenced RHG under phosphate starvation (-Pi) conditions. The study revealed that auxin and phosphate starvation-induced responses were necessary for Fe-triggered RHG, as evidenced by reduced sensitivity in certain mutants. Fe affected auxin distribution and the expression of phosphate starvation-responsive genes, and proteomic analysis showed that vesicle trafficking was influenced by Fe under -Pi. The application of brefeldin A demonstrated that vesicle trafficking is crucial for Fe-triggered RHG. Overall, the research suggested that Fe plays a role in RHG under -Pi by integrating vesicle trafficking, auxin distribution, and phosphate starvation responses, enhancing the understanding of the interaction between phosphate and iron in root hair development.