2002/10/21 by Enzo Lombi, Fang‐Jie Zhao, M. Fuhrmann +2 · 1 citation
Environmental Science · Agricultural and Biological Sciences · #Arsenic contamination and mitigation #Lichen and fungal ecology #Heavy metals in environment
paper · pdf · doi:10.1046/j.1469-8137.2002.00512.x
openalex publication_date 2002/10/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/06/24
• Pteris vittata is the first plant reported to be a hyperaccumulator of arsenic (As), and little is known about the mechanisms of As hyperaccumulation in this plant. • Arsenic distribution at the whole plant (fronds) and cellular level was investigated using chemical analyses and energy dispersive X-ray microanalyses (EDXA). Speciation of As in the fronds was determined using X-ray absorption near edge spectroscopy (XANES) analyses. • The majority of As was found in the pinnae (96% of total As). The concentration of As in pinnae decreased from the base to the apex of the fronds. Arsenic concentrations in spores and midribs were much lower than in the pinnae. EDXA analyses revealed that As was compartmentalized mainly in the upper and lower epidermal cells, probably in the vacuoles. The distribution pattern of potassium was similar to As, whereas other elements (Ca, Cl, K, Mg, P and S) were distributed differently. • XANES analyses showed that approximately 75% of the As in fronds was present in the As(III) oxidation state and the remaining as As(V).