Mercury enrichment in <em>Brassica napus</em> in response to elevated atmospheric mercury concentrations

doi:10.1007/s11783-017-0892-z

Front. Environ. Sci. Eng.

2017, Vol. 11

Issue (1) : 2 https://doi.org/10.1007/s11783-017-0892-z

RESEARCH ARTICLE

Mercury enrichment in Brassica napus in response to elevated atmospheric mercury concentrations

Chunhao Dai¹(

),Pufeng Qin¹,Zhangwei Wang²,Jian Chen²,Xianshan Zhang²,Si Luo¹

¹. College of Resources & Environment, Hunan Agricultural University, Changsha 410128, China
². Department of Atmospheric Environment, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

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Abstract

Mercury enrichment in response to elevated atmospheric mercury concentrations in the organs of rape (Brassica napus) was investigated.

Elevated soil mercury content had significant impact on mercury accumulation in rape stems, roots, seeds and seed coats.

Leaf mercury in the leaves was mostly affected by atmospheric input while the stems were mostly affected by soil concentrations.

Mercury in the aboveground plant tissue mainly derived from atmospheric absorption, and atmospheric mercury absorption in leaves was higher than that in the stems.

Mercury enrichment in response to elevated atmospheric mercury concentrations in the organs of rape (Brassica napus) was investigated using an open top chamber fumigation experiment and a soil mercury enriched cultivation experiment. Results indicate that the mercury concentration in leaves and stems showed a significant variation under different concentrations of mercury in atmospheric and soil experiments while the concentration of mercury in roots, seeds and seed coats showed no significant variation under different atmospheric mercury concentrations. Using the function relation established by the experiment, results for atmospheric mercury sources in rape field biomass showed that atmospheric sources accounted for at least 81.81% of mercury in rape leaves and 32.29% of mercury in the stems. Therefore, mercury in the aboveground biomass predominantly derives from the absorption of atmospheric mercury.

Keywords Open top chamber Gaseous elemental mercury (GEM) Soil Mercury Brassica napus

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Corresponding Author(s): Chunhao Dai

Issue Date: 25 November 2016

Cite this article:

Chunhao Dai,Pufeng Qin,Zhangwei Wang, et al. Mercury enrichment in Brassica napus in response to elevated atmospheric mercury concentrations[J]. Front. Environ. Sci. Eng., 2017, 11(1): 2.

URL:

https://academic.hep.com.cn/fese/EN/10.1007/s11783-017-0892-z
https://academic.hep.com.cn/fese/EN/Y2017/V11/I1/2

Fig.1 The OTC system (a) the OTC structural representation; (b) the OTCs field rendering

Tab.1 Changes of mercury content in rape rhizosphere soil and bulk soil before and after fumigation

Fig.2 Effect of atmospheric and soil mercury on mercury content in rape leaves. (a) atmospheric mercury; (b) soil mercury

Fig.3 Effect of atmospheric and soil mercury on mercury content in rape stems. (a) atmospheric mercury; (b) soil mercury

Fig.4 Effect of atmospheric and soil mercury on mercury content in rape roots. (a) atmospheric mercury; (b) soil mercury

Fig.5 Effect of atmospheric mercury on mercury content in rape seeds and seed coats

Fig.6 Effect of soil mercury on mercury content in rape seeds and seed coats

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