Accumulation and translocation of 198Hg in four crop species

	Accumulation and translocation of 198Hg in four crop species
	Liwei Cui; Xinbin Feng; Che-Jen Lin; Xinming Wang; Bo Meng; Xun Wang; Heng Wang
通讯作者	Xinbin Feng
	2014
发表期刊	Environmental Toxicology and Chemistry
卷号	33 期号:2 页码:334-340
摘要	The uptake and transport of mercury (Hg) through vegetation play an important role in the biogeochemical cycling of Hg. However, quantitative information regarding Hg translocation in plants is poorly understood. In the present study, Hg uptake, accumulation, and translocation in 4 cropsrice (Oryza.sativaL.), wheat (TriticumL.), corn (Zea mays L.), and oilseed rape (Brassica campestris L.)grown in Hoagland solution were investigated using a stable isotope (Hg-198) tracing technique. The distribution of Hg-198 in root, stem, and leaf after uptake was quantified, and the release of Hg-198 into the air from crop leaf was investigated. It was found that the concentration of Hg accumulated in the root, stem, and leaf of rice increased linearly with the spiked Hg-198 concentration. The uptake equilibrium constant was estimated to be 2.35mol Hg/g dry weight in rice root per mol/L Hg remaining in the Hoagland solution. More than 94% of Hg-198 uptake was accumulated in the roots for all 4 crops examined. The translocation to stem and leaf was not significant because of the absence of Hg2+ complexes that facilitate Hg transport in plants. The accumulated Hg-198 in stem and leaf was not released from the plant at air Hg-0 concentration ranging from 0ng/m(3) to 10ng/m(3). Transfer factor data analysis showed that Hg translocation from stems to leaves was more efficient than that from roots to stems.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5174
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文环境地球化学国家重点实验室
通讯作者	Xinbin Feng
推荐引用方式 GB/T 7714	Liwei Cui,Xinbin Feng,Che-Jen Lin,et al. Accumulation and translocation of 198Hg in four crop species[J]. Environmental Toxicology and Chemistry,2014,33(2):334-340.
APA	Liwei Cui.,Xinbin Feng.,Che-Jen Lin.,Xinming Wang.,Bo Meng.,...&Heng Wang.(2014).Accumulation and translocation of 198Hg in four crop species.Environmental Toxicology and Chemistry,33(2),334-340.
MLA	Liwei Cui,et al."Accumulation and translocation of 198Hg in four crop species".Environmental Toxicology and Chemistry 33.2(2014):334-340.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Accumulation and tra（250KB）			开放获取	使用许可	浏览请求全文