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Frontiers of Environmental Science & Engineering

ISSN 2095-2201

ISSN 2095-221X(Online)

CN 10-1013/X

Postal Subscription Code 80-973

2018 Impact Factor: 3.883

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     
PACS:     
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Corresponding Authors: 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:  
http://academic.hep.com.cn/fese/EN/10.1007/s11783-017-0892-z
http://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
mercury concentration
in the?atmosphere
/( ng·m-3)
before fumigation experiment/(ng·g-1) after fumigation experiment/(ng·g-1)
rhizosphere soil bulk soil rhizosphere soil bulk soil
5±2 231.8±32.8(a) 273.6±11.0(a) 201.3±27.4(a) 195.9±12.6(a)
15–20 228.4±17.2(a) 266.8±7.2(a) 188.3±29.5(a) 177.9±14.6(a)
45–50 190.3±6.3(a) 229.5±4.2(a) 180.5±15.1(a) 220.7±9.3(a)
90–100 195.1±9.5(a) 262.3±19.2(a) 200.7±33.1(a) 244.1±33.4(a)
AVG 211.4±21.7 258.1±19.6 192.7±10.1 209.6±28.9
the letter in parentheses showed no significant difference (P > 0.05)
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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