Determining the fluxes of Tl+ and K+ at the root surface of wheat and canola using Tl(I) and K ion-selective microelectrodes

The objectives of this study were to develop and evaluate a Tl+ ion-selective microelectrode (ISME) and to determine the basis for observed differences in Tl accumulation by durum wheat (Triticum turgidum L. var ‘Kyle’) and spring canola (Brassica napus L. cv ‘Hyola 401’). Seedlings were grown hydroponically and fluxes of K+ and Tl+ were measured at the root surface in solutions containing 5 μM Tl+ or 3 mM K+. After testing two different Tl(I) …