Arsenic accumulation and speciation in plants from different habitats

Abstract

Understanding As accumulation in plants is necessary in order to alleviate problems with As in the environment and to improve sustainable As phytotechnologies. To find suitable candidates for phytoremediation purposes and to investigate specific accumulation patterns due to growth habitat and plant groups, As accumulation in 124 plant species collected from different habitats and speciation in 6 of these plant species, was determined. The data show that submerged plants have a higher accumulation than emergent and terrestrial plants. The As concentration in terrestrial and emergent plants were correlated with the [As] soil , while the accumulation factor correlated negatively with [As] soil. Gymnosperms had a high [As] shoot :[As] root ratio. The inorganic As species, arsenate and arsenite were found in plants from all habitats and methylarsonic acid (MMA) in all but one plant species. Arsenate predominated in submerged plants. The results suggest that the habitat and the [As] soil have a strong influence on the As accumulation in plants and that submerged plants and/or gymnosperms might be suitable for phytoremediation of As.

Arsenic quantification techniques and ISO/IEC 17025 accreditation in Brazil

“…However, it does not cover all species analyzed in scientific studies, quantifying only the species As III, As V, Monomethyl Arsenic (MMA), Dimethyl Arsenic (DMA) and Arsenic Betaine (AsB). Species such as trimethylarsine oxide (TMAO) found in plants (Bergqvist and Greger, 2012) or Arsenocoline (AsC) found in marine animals (Raber et al 2012), are not accredited by any Brazilian laboratory.…”

Accumulation of arsenic in plants from arsenic contaminated irrigation water

“…Demir hidrit ve Fe, Mn, Al oksit/hidroksitlerin çözünürlüğü pH'a bağlı olarak değiştiğinden, arsenitin çözünürlüğü pH düştükçe artarken, arsenatın çözünürlüğü artan pH ile artmaktadır [5].…”

“…Ayrıca taze ve pişmiş olarak insanlar tarafından doğrudan tüketilen, domates, soğan, patates gibi tarımsal ürünlerde As kirlenmesi araştırmaları olmasına rağmen genel olarak çalışmalar, toprakta As kirliğinin etkisi ile ilgilidir. Çalışma sonuçlarında pirinç gibi tarım ürünlerinin çok fazla tüketimi ile insanların yüksek miktarda As alımına neden olabileceği açıklanmıştır [5], [6].…”

Biochemical and Molecular Basis of Arsenic Toxicity and Tolerance in Microbes and Plants

“…Analyses of a range of plant species with the aid of analytical techniques such as HPLC/ICPMS/ES-MS and synchrotron radiation-based X-ray absorption spectroscopy (XAS) have shown that both terrestrial and freshwater aquatic plants contain predominantly inorganic As [26][27][28] but their relative proportions vary among the plant species. Analyses of a range of plant species with the aid of analytical techniques such as HPLC/ICPMS/ES-MS and synchrotron radiation-based X-ray absorption spectroscopy (XAS) have shown that both terrestrial and freshwater aquatic plants contain predominantly inorganic As [26][27][28] but their relative proportions vary among the plant species.…”

“…As is present predominantly as trivalent species [As(III)] [29][30][31][32] and is the main species in the fronds of As-hyperaccumulating ferns [29,33,34]. Many plant species also contain small amounts of methylated As compounds, such as MMA, DMA, TMAO, and, occasionally, the tetramethylarsonium ion [26][27][28]. However, As hyperaccumulators such as Pteris vittata and Pteris cretica appear to be exceptions, containing arsenite mostly as uncomplexed species, due to low phytochelatin (PC) concentrations in tissues [35,36].…”