High Auxin and High Phosphate Impact on RSL2 Expression and ROS-Homeostasis Linked to Root Hair Growth in Arabidopsis thaliana

Frontiers in Plant Science
Silvina ManganoJosé M Estevez

Abstract

Root hair size determines the surface area/volume ratio of the whole roots exposed to the nutrient and water pools, thereby likely impacting nutrient and water uptake rates. The speed at which they grow is determined both by cell-intrinsic factors like hormones (e.g., auxin) and external environmental signals like nutrient availability in the soil (e.g., phosphate). Overall root hair growth is controlled by the transcription factors RSL4 and RSL2. While high levels of auxin promote root hair growth, high levels of inorganic phosphate (Pi) in the media are able to strongly repress RSL4 and RSL2 expression linked to a decreased polar growth. In this work, we inquired the mechanism used by root hairs to integrate conflicting growth signals like the repressive signal of high Pi levels and a concomitant high auxin exposure that promotes growth and questioned whether these complex signals might activate known molecular players in root hair polar growth. Under these conditions, RSL2 expression (but not RSL4) is activated linked to ROS production and root hair growth. On the other hand, by blocking ROS production derived from the NADPH Oxidase C (or RBOHC for RESPIRATORY BURST OXIDASE HOMOLOG C) and ROS production from Secreted type-II...Continue Reading

References

Mar 30, 2011·The Plant Journal : for Cell and Molecular Biology·Antje FellerErich Grotewold
Feb 26, 2013·The New Phytologist·Nulu Naga Prafulla ChandrikaWolfgang Schmidt
May 22, 2013·Proceedings of the National Academy of Sciences of the United States of America·Nuno D PiresLiam Dolan
Nov 26, 2013·Frontiers in Plant Science·Richard D-W Lee, Hyung-Taeg Cho
Jan 21, 2016·Plant Physiology·Silvia Melina VelasquezJosé M Estevez
Dec 6, 2016·Current Opinion in Plant Biology·Anna FranciosiniKeiko Sugimoto
Feb 9, 2017·Plant Physiology·Bart RymenKeiko Sugimoto
May 4, 2017·Proceedings of the National Academy of Sciences of the United States of America·Silvina ManganoJosé Manuel Estevez
Dec 14, 2017·Proceedings of the National Academy of Sciences of the United States of America·Ying FengHongwei Guo

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Citations

Jan 30, 2020·Journal of Experimental Botany·Kris VissenbergSébastjen Schoenaers
Mar 25, 2019·Journal of Plant Research·Michitaro Shibata, Keiko Sugimoto
Mar 31, 2021·Journal of Experimental Botany·Chaonan LiRuilian Jing
Aug 18, 2021·Ecotoxicology and Environmental Safety·Hang ZhouDeqiang Qi

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Methods Mentioned

BETA
transgenic
PCR
biosensor

Software Mentioned

HyPer
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