Plant Soil Environ., 2015, 61(3):103-108 | DOI: 10.17221/900/2014-PSE
Emission of climate relevant volatile organochlorines by plants occurring in temperate forestsOriginal Paper
- 1 Isotope Laboratory, Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Prague, Czech Republic
- 2 Helmholtz Zentrum München GmbH Neuherberg, Research Unit Microbe-Plant Interactions, WG Plant Endophyte Physiology, Munich, Germany
- 3 Department of Physical and Macromolecular Chemistry, Charles University in Prague, Prague, Czech Republic
- 4 Department of Chemistry of Natural Compounds, Institute of Chemical Technology, Prague, Czech Republic
Chlorine, one of the most abundant elements in nature, undergoes a complex biogeochemical cycle in the environment, involved in the formation of volatile organochlorines (VOCls), which in turn can contribute to environmental problems, contaminate natural ecosystems, and are of public health concern. Several industrial and natural sources of VOCls have already been identified; however, data - particularly on the natural sources - are still scarce. The aim of this study was to investigate the diversity of emission of VOCls from soil and several undergrowth plants collected in temperate spruce forest ecosystem and the effect of salting on the VOCl emission of plants. Undergrowth plants were found to emit chloroform (CHCl3) in the range of 2.2-201 pmol/day/g dry weight (DW), tetrachloromethane (CCl4) 0-23.5 pmol/day/g DW, and tetrachloroethene (C2Cl4) 0-13.5 pmol/day/g DW; the average emission rates were about 10 times higher than that of soil (2.9-47.2; 0-5.8; 0-3.6 pmol/day/g DW of CHCl3; CCl4; C2Cl4 emission, respectively). Addition of sodium chloride solution in most cases caused an increase in the emission of CHCl3 and caused a species specific - effect on the emissions of CCl4 and C2Cl4. The results suggest that the emission of VOCls from spruce forest contribute to the atmospheric input of reactive chlorine; however, on a global scale it is only a minor net source.
Keywords: volatile chlorinated hydrocarbons; biodegradation; Sphagnum moss; ozone-depleting substances; headspace cryofocusing method; boreal forests
Published: March 31, 2015 Show citation
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