title: Pteris vittata - revisited: uptake of As and its speciation, impact of P, role of phytochelatins and S.
abstract: Pteris vittata is known to hyperaccumulate As but the mechanism is poorly understood. We found an increase of As concentration with increasing soil solution As concentrations, but P application had no impact, although plant P concentrations responded to different rates of P supply. As in fronds was dominantly (82-89%) present in the form of AsIII. In roots we detected 45% as AsIII which is higher than reported in previous studies and supports substantial As-reduction to take place in roots. We detected PC2/3GS-AsIII, PC2-GS-AsIII and (PC2)2-AsIII in increasing amounts with application of As. The total amount of PC was in the range reported previously and far too small to assign a significant role in As detoxification to PCs. The close correlation between S and As in fronds and the lack of data on sulphur uptake and metabolism indicates the need for a detailed investigation on sulphur nutritional status and As metabolism in P. vittata.
authors: UFZ Helmholtz Centre for Environmental Research, Department of Soil Physics, Halle, Germany. doris.vetterlein@ufz.de
authors: Doris
authors: D
authors: Vetterlein
authors: Dirk
authors: D
authors: Wesenberg
authors: Petra
authors: P
authors: Nathan
authors: Anja
authors: A
authors: Bräutigam
authors: Angelika
authors: A
authors: Schierhorn
authors: Jürgen
authors: J
authors: Mattusch
authors: Reinhold
authors: R
authors: Jahn
mesh_terms: D001151:Arsenic / Q000378:metabolism*; D010758:Phosphorus / Q000378:metabolism*; D054811:Phytochelatins / Q000378:metabolism*; D032495:Pteris / Q000378:metabolism*; D012989:Soil Pollutants / Q000378:metabolism*; D013455:Sulfur / Q000378:metabolism*
chemical_list: D012989:Soil Pollutants; D010758:Phosphorus; D013455:Sulfur; D054811:Phytochelatins; D001151:Arsenic