The influence of iron plaque on the absorption, translocation and transformation of mercury in rice (Oryza sativa L.) seedlings exposed to different mercury species.

	The influence of iron plaque on the absorption, translocation and transformation of mercury in rice (Oryza sativa L.) seedlings exposed to different mercury species.
	Li YY(李云云); Zhao JT(赵甲亭); Zhang BW(张博闻); Liu YJ(刘永杰); Xu XH(徐小晗); Li YF(李玉锋); Li B(李柏); Gao YX(高愈希); Chai ZF(柴之芳); Li
刊名	PLANT AND SOIL
	2015
页码	1-11
通讯作者	高愈希
英文摘要	Background and aims: Iron plaque can affect the absorption and accumulation of metal(loid)s in plants. However, it is still unclear whether iron plaque plays different roles in the accumulation of different mercury species in rice plants. The aims of this study are 1) to explore the adsorption of IHg and MeHg onto iron plaque, 2) to investigate the influence of iron plaque on the absorption, translocation of IHg and MeHg in rice plants, 3) to explore whether the process of methylation and demethylation of Hg in vivo occurs in rice plants, and 4) to investigate the effects of iron plaque on the IHg and MeHg transformation in rice. Methods: The seedlings were cultivated in an Fe2+ soln. for 24 h to induce the iron plaque and then transferred into a nutrient soln. contg. 500 渭g/L HgCl2 or MeHgCl for 72 h. The Hg content in the iron plaque and rice seedlings was measured by ICP-MS. The chem. forms of Hg in the rice seedlings were detd. with HPLC-ICP-MS and XANES. Results: Both IHg and MeHg, particularly MeHg, could be adsorbed by iron plaque. The IHg content of the root and the MeHg content in both the roots and shoots decreased markedly with the increase in iron plaque. The Hg in the root was mainly in the form of RS-Hg-SR with the exposure to HgCl2 and in the form of CH3-Hg-SR and RS-Hg-SR (4:1) with the exposure to MeHgCl. The iron plaque did not change the chem. forms of Hg in the rice plants. Conclusions: Iron plaque greatly decreased the absorption and translocation of both IHg and MeHg in rice seedlings. The demethylation of MeHg occurred in rice plants (in vivo) regardless the formation of iron plaque. This work sheds some light on the understanding of different pathways between IHg and MeHg in rice plants. [on SciFinder(R)]
收录类别	CA
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228878]
专题	高能物理研究所_院士高能物理研究所_实验物理中心高能物理研究所_多学科研究中心
推荐引用方式 GB/T 7714	Li YY,Zhao JT,Zhang BW,et al. The influence of iron plaque on the absorption, translocation and transformation of mercury in rice (Oryza sativa L.) seedlings exposed to different mercury species.[J]. PLANT AND SOIL,2015:1-11.
APA	李云云.,赵甲亭.,张博闻.,刘永杰.,徐小晗.,...&Zhifang..(2015).The influence of iron plaque on the absorption, translocation and transformation of mercury in rice (Oryza sativa L.) seedlings exposed to different mercury species..PLANT AND SOIL,1-11.
MLA	李云云,et al."The influence of iron plaque on the absorption, translocation and transformation of mercury in rice (Oryza sativa L.) seedlings exposed to different mercury species.".PLANT AND SOIL (2015):1-11.