; Chen, Tong-Bin
; Lei, Mei
; Liu, Ying-Ru] Chinese Acad Sci, Inst Geog & Nat Resources Res, Ctr Environm Remediat, Beijing 100101, Peoples R China
; [Hu, Tian-Dou] Chinese Acad Sci, Inst High Energy Phys, Lab Synchrotron Radiat, Beijing 100039, Peoples R China
The arsenic (As) hyperaccumulators, Pteris vittata and Pteris cretica and an As-tolerant plant Boehmeria nivea, were selected to compare the toxicity, uptake, and transportation of inorganic arsenate (As(V)) and its methylated counterpart dimethylarsinic acid (DMA). The XANES method was used to elucidate the effect of As species transformation on As toxicity and accumulation characteristics. Significantly higher toxicity and lower accumulation of DMA than inorganic As V) was shown in the As hyperaccumulators and the As-tolerant plant. Reduction of As(V) was commonly found in the plants. Arsenic complexation with thiols, which have less mobility in plants and usually occur in As-tolerant plants, was also found in rhizoids of P. cretica. Plants with greater ability to form As-thiolate have lower ability for upward transport of As. Demethylation of DMA occurred in the three plants. The DMA component decreased from the rhizoids to the fronds in both hyperaccumulators, while this tendency is reverse in B. nivea.
Huang, ZC,Chen, TB,Lei, M,et al. Difference of toxicity and accumulation of methylated and inorganic arsenic in arsenic-hyperaccumulating and -hypertolerant plants[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2008,42(14):5106-5111.
Huang, ZC,Chen, TB,Lei, M,Liu, YR,Hu, TD,&胡天斗.(2008).Difference of toxicity and accumulation of methylated and inorganic arsenic in arsenic-hyperaccumulating and -hypertolerant plants.ENVIRONMENTAL SCIENCE & TECHNOLOGY,42(14),5106-5111.
Huang, ZC,et al."Difference of toxicity and accumulation of methylated and inorganic arsenic in arsenic-hyperaccumulating and -hypertolerant plants".ENVIRONMENTAL SCIENCE & TECHNOLOGY 42.14(2008):5106-5111.