Unveiling Potassium and Sodium Ion Dynamics in Living Plants with an <i>In-Planta</i> Potentiometric Microneedle Sensor.

ABSTRACT: Potassium and sodium ions (K⁺ and Na⁺) play crucial roles in influencing plant growth and health status. Unfortunately, current strategies to determine the concentrations of such ions are destructive for the plants because it is necessary to collect/extract the sap for further analysis and produce either scattered or delayed results. Here, we introduce a new potentiometric dual microneedle sensor for nondestructive, real-time, and continuous monitoring of K⁺ and Na⁺ concentrations in living plants. The developed sensors show a response time <5 s, close-to-Nernstian slope (∼55 mV dec^-1), resiliency to five insertions on the stem, good repeatability (max. %RSD = 0.3%) and reversibility (max. %RSD = 3%), appropriate continuous operation f

SUBMITTER: Wang Q 

PROVIDER: S-EPMC11519921 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature