Root hydraulics adjustment is governed by a dominant cell-to-cell pathway in Beta vulgaris seedlings exposed to salt stress

VITALI, VICTORIA; SUTKA, MOIRA; CATANIA, ANTONELLA; OZU, MARCELO; AROCA, RICARDO; AMODEO, GABRIELA

Congreso; RAFV Conference 2021 - XXXIII Argentinian meeting of Plant Physiology; 2021

Soil salinity reduces root hydraulic conductivity (L ) of several plant species. However, how cellular signaling and root hydraulic proper cope with water restriction remains unclear. In this work, we exposed the halotolerant species red beet (Beta vulgaris) to increa determine the components that might be critical to sustaining the capacity to adjust root hydraulics. Our strategy was to use both hyd hydroponically grown seedlings during the first osmotic phase of salt stress. Interestingly, L presented a bimodal profile response a imposed salt stress. As well as L , the PIP2-aquaporin profile follows an unphosphorylated/phosphorylated pattern when increasing aquaporins remain constant. L also shows high sensitivity to cycloheximide. In low NaCl concentrations, L was high and 70 % of its the CHX-inhibited cell-to-cell pathway. More interestingly, roots can maintain a constant spontaneous exudated flow that is ind concentration. In conclusion, Beta vulgaris root hydraulic adjustment completely lies in a dominant cell-to-cell pathway that contr demands.