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Difference of toxicity and accumulation of methylated and inorganic arsenic in arsenic-hyperaccumulating and -hypertolerant plants
Huang Z. C.; Chen T. B.; Lei M.; Liu Y. R.; Hu T. D.
Source PublicationEnvironmental Science & Technology
2008
Volume42
Issue14
Pages5106-5111
KeywordPteris-vittata L. Chinese Brake Fern Holcus-lanatus Chemical Speciation Phytochelatin Complexes Xylem-sap Transformation Tolerance Growth Phytotoxicity
AbstractThe 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.
Indexed BySCI
Language英语
ISSN0013-936X
Document TypeSCI/SSCI论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/23785
Collection历年回溯文献
Recommended Citation
GB/T 7714
Huang Z. C.,Chen T. B.,Lei M.,et al. Difference of toxicity and accumulation of methylated and inorganic arsenic in arsenic-hyperaccumulating and -hypertolerant plants. 2008.
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