Arsenic redox transformations and cycling in the rhizosphere of Pteris vittata and Pteris quadriaurita.

ABSTRACT: Pteris vittata (PV) and Pteris quadriaurita (PQ) are reported to hyperaccumulate arsenic (As) when grown in Asrich soil. Yet, little is known about the impact of their unique As accumulation mechanisms on As transformations and cycling at the soil-root interface. Using a combined approach of two-dimensional (2D), sub-mm scale solute imaging of arsenite (As^III), arsenate (As^V), phosphorus (P), manganese (Mn), iron (Fe) and oxygen (O₂), we found localized patterns of As^III/As^V redox transformations in the PV rhizosphere (As^III/As^V ratio of 0.57) compared to bulk soil (As^III/As^V ratio of ≤0.04). Our data indicate that the high As root uptake, translocation and accumulation from the

SUBMITTER: Wagner S 

PROVIDER: S-EPMC7610922 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature