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Arsenic biotransformation and volatilization in transgenic rice

Meng, Xiang-Yan ; Qin, Jie ; Wang, Li-Hong ; Duan, Gui-Lan ; Sun, Guo-Xin ; Wu, Hui-Lan ; Chu, Cheng-Cai ; Ling, Hong-Qing ; Rosen, Barry P. ; Zhu, Yong-Guan

The New phytologist, 2011-07, Vol.191 (1), p.49-56 [Periódico revisado por pares]

Oxford, UK: John Wiley & Sons

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Título:
Arsenic biotransformation and volatilization in transgenic rice
Autor: Meng, Xiang-Yan ; Qin, Jie ; Wang, Li-Hong ; Duan, Gui-Lan ; Sun, Guo-Xin ; Wu, Hui-Lan ; Chu, Cheng-Cai ; Ling, Hong-Qing ; Rosen, Barry P. ; Zhu, Yong-Guan
Assuntos: Arsenates ; Arsenic ; Arsenic - metabolism ; Arsenic compounds ; Arsenicals ; Arsenite ; As(III) S‐adenosylmethyltransferase ; Biodegradation, Environmental ; Bioremediation ; Biotransformation ; DNA methylation ; Emission spectroscopy ; food safety ; Gene expression ; Genes, Bacterial ; High performance liquid chromatography ; HPLC ; Inductively coupled plasma mass spectrometry ; Liquid chromatography ; Mass spectrometry ; Mass spectroscopy ; Methylation ; Methyltransferase ; Nutrient solutions ; Oryza - genetics ; Oryza - metabolism ; Oryza sativa japonica ; Oxidation ; Phytoremediation ; Plant roots ; Plant Roots - metabolism ; Plant Shoots - metabolism ; Plants ; Plants, Genetically Modified - metabolism ; Rapid report ; Rhodopseudomonas - genetics ; Rhodopseudomonas palustris ; Rice ; Scientific imaging ; Shoots ; Soil bacteria ; Soil microorganisms ; Speciation ; Transgenic plants ; transgenic rice ; Vaporization ; volatile arsenicals ; Volatilization
É parte de: The New phytologist, 2011-07, Vol.191 (1), p.49-56
Notas: These authors contributed equally to this work.
Descrição: Biotransformation of arsenic includes oxidation, reduction, methylation, and conversion to more complex organic arsenicals. Members of the class of arsenite (As(III)) S-adenosylmethyltransferase enzymes catalyze As(III) methylation to a variety of mono-, di-, and trimethylated species, some of which are less toxic than As(III) itself. However, no methyltransferase gene has been identified in plants. Here, an arsM gene from the soil bacterium Rhodopseudomonas palustris was expressed in Japonica rice (Oryza sativa) cv Nipponbare, and the transgenic rice produced methylated arsenic species, which were measured by inductively coupled plasma mass spectrometry (ICP-MS) and high-performance liquid chromatography—inductively coupled plasma mass spectrometry (HPLC-ICP-MS). Both monomethylarsenate (MAs(V)) and dimethylarsenate (DMAs(V)) were detected in the roots and shoots of transgenic rice. After 12 d exposure to As(III), the transgenic rice gave off 10-fold greater volatile arsenicals. The present study demonstrates that expression of an arsM gene in rice induces arsenic methylation and volatilization, theoretically providing a potential stratagem for phytoremediation.
Editor: Oxford, UK: John Wiley & Sons
Idioma: Inglês

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Arsenic biotransformation and volatilization in transgenic rice

Meng, Xiang-Yan ; Qin, Jie ; Wang, Li-Hong ; Duan, Gui-Lan ; Sun, Guo-Xin ; Wu, Hui-Lan ; Chu, Cheng-Cai ; Ling, Hong-Qing ; Rosen, Barry P. ; Zhu, Yong-Guan

Oxford, UK: John Wiley & Sons

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