Effects of root oxidation ability and P on As mobility and bioavailability in rice
Effects of root oxidation ability and P on As mobility and bioavailability in rice
复制标题
根系氧化能力和磷对水稻砷迁移率和生物利用度的影响
DOI：
10.1007/s11771-015-2496-8
复制
发表时间：
2015-01
影响因子：
4.4
通讯作者：
Ming-hung Wong
中科院分区：
文献类型：
--
作者：
Wei-song Pan;Sheng-guo Xue;Jing-yu Mo;Ming-hung Wong
研究了根部氧化能力和施磷对土壤中砷迁移率的影响，以及随后水稻植株对砷的吸收、易位和形态形成的影响。结果表明，根氧化显着影响根际砷的迁移。具有较高径向氧损失（ROL）的基因型TD71诱导更多的铁斑形成，并在铁斑和根际土壤中隔离更多的砷和磷，导致水稻植株中砷的积累减少。此外，磷的添加可动员土壤溶液中的砷，并增加水稻植株中砷的积累。砷形态分析结果显示，谷壳中检测到的砷形态以无机砷为主，占总砷的82%~93%，而籽粒中砷的形态以无机砷和二甲基砷（DMA）为主，其中DMA占总砷的33%~64%。随着 As 和 P 浓度的增加，无机 As 的比例减少，而 DMA 的比例增加。该研究进一步阐明了ROL对水稻砷耐受性和积累影响的机制。
The effects of root oxidization ability and P fertilization on As mobility in soils, and subsequently As uptake, translocation and speciation in rice plants were investigated. Results show that root oxidation significantly influences As mobility in rhizoshphere. Genotype TD71 with higher radial oxygen loss (ROL) induces more Fe plaque formation and sequesters more As and P in iron plaque and rhizoshphere soil, leading to the reduction of As accumulation in rice plants. Additionally, P addition mobilizes As in soil solution, and increases As accumulation in rice plants. Arsenic speciation results show that the majority of As species in husks detected is inorganic As, accounting for 82%–93% of the total As, while in grains the majority of As is inorganic As and dimethyl arsenic (DMA), with DMA accounting for 33%–64% of the total As. The fraction of inorganic As decreases while fraction of DMA increases, with increasing As and P concentrations. The study further elucidates the mechanisms involved in effects of ROL on As tolerance and accumulation in rice.
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影响因子：
11.4
作者：
Abedin, MJ;Cresser, MS;Cotter-Howells, J
通讯作者：
Cotter-Howells, J
影响因子：
2.6
作者：
F. Andersen;K. R. Olsen
通讯作者：
F. Andersen;K. R. Olsen
DOI：
--
发表时间：
1971
期刊：
--
影响因子：
--
作者：
S. Yoshida;D. Forno;J. Cock
通讯作者：
S. Yoshida;D. Forno;J. Cock
影响因子：
8.9
作者：
X. Mei;Zhihong Ye;M. H. Wong
通讯作者：
X. Mei;Zhihong Ye;M. H. Wong
影响因子：
11.4
作者：
Li, R. Y.;Stroud, J. L.;Zhao, F. J.
通讯作者：
Zhao, F. J.