PIF2025 - Caracterización del Reajuste Iónico de la Raíz en un suelo seco: un Mecanismo Adaptativo Esencial frente a la Sequía (OsmoRoot) - (PID2024-159116NB-I00)

This proposal aims to deepen our understanding of an adaptive mechanism underlaying drought resistance of land plants and crops, the regulation of which remains largely unknown: sustaining root growth in dry soil. Objectives: 1) To investigate how S-Type anion channels and ABA-dependent kinases regulate both Cl¯ and NO3¯ transport into the xylem and modify root architecture of Arabidopsis thaliana plants; 2) To functionally characterize R-Type channels involved 3) To assess whether the coexpression in Xenopus oocytes of channel-kinase pairs affects Cl¯ and NO3¯ transport; 4) To investigate the occurence the root-triggered mechanism of shoot-to-root relocation of resources; 5) To investigate the involvement of electric signals in root-to-shoot signaling of water deficit through the use of optogenetic tools.