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Production of organically bound halogens by the litter-degrading fungus Lepista nuda
Linköping University, Department of Mechanical Engineering, Environmental Technique and Management. Linköping University, The Institute of Technology.
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
1999 (English)In: Soil Biology and Biochemistry, ISSN 0038-0717, E-ISSN 1879-3428, Vol. 31, no 11, 1510-1515 p.Article in journal (Refereed) Published
Abstract [en]

The ability of Lepista nuda to produce organically bound halogens was tested both in a laboratory study of a pure culture and in a field study. It was found that L. nuda caused an increase in the total amount of organically bound halogens in the study of a pure culture, but possibly because of large variance between replicates, no such increase could be detected in the field study. In addition, in both the laboratory and the field studies, low-molecular-weight organohalogens such as chlorinated benzaldehydes were detected in all samples affected by the fungus and the amounts were 0.2–82 μg/g d.w. These low-molecular-weight compounds correspond to approximately 30% of the increase in organohalogens detected in the laboratory study. It is suggested that the low-molecular-weight organohalogens detected, most likely are produced de novo by L. nuda and that production of such compounds followed by an incorporation into high-molecular-weight compounds is an explanation for the increase in amounts in the laboratory study.

Place, publisher, year, edition, pages
1999. Vol. 31, no 11, 1510-1515 p.
Keyword [en]
Litter-degrading fungi, Chlorinated organic compounds, Production
National Category
Social Sciences Interdisciplinary
Identifiers
URN: urn:nbn:se:liu:diva-32221DOI: 10.1016/S0038-0717(99)00069-3Local ID: 18094OAI: oai:DiVA.org:liu-32221DiVA: diva2:253043
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2017-12-13Bibliographically approved
In thesis
1. Organic chlorine and chloride in soil
Open this publication in new window or tab >>Organic chlorine and chloride in soil
2000 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Chloride is generally believed to be conservative with respect to water and is often used as atracer of water movement in hydrological research and biogeochemical modeling. However,the last decade of research has shown that naturally fanned organically bound chlorine isubiquitous in the environment. The turnover of such compounds has previously not been putin relation to the geochemical cycle of chloride.

The aim of this thesis was to examine and compare the distribution of organically bound chlorine and chloride in soil. The influence of central soil-forming factors, such as climate, ecosystems and topography were studied and special attention was paid to spatial distribution patterns. Samples were collected in southern Sweden and in the Anhui province in China. The former is situated in the temperate region and the latter in the subtropical region.

The results show that the storage of organic chlorine in the Swedish soils was 2-4 times larger than the chloride storage. This suggest that the storage of organic chlorine in forest soils with a moderate chloride deposition in the temperate region is of such size that even small changes in this storage are likely to have a considerable impact on the transport of chloride. In contrast, the size of the storage of organic chlorine in the Chinese soils was 2 times smaller than the storage of chloride. The storage is still of such size that it cannot be excluded thatchanges in this storage influence the transport of chloride.

It was also found that the concentration of both forms of chlorine varied among different types of ecosystems such as coniferous and deciduous forest soils. In addition, both forms of chlorine appear to vary seasonally with higher concentrations in the winter and lower concentrations in the summer. The spatial distribution pattem of organic chlorine followed that for organic matter in the Chinese forest soil whereas it followed the pattern of chloride in the study of Swedish forest soils.

In conclusion, the occurrence of organically bound chlorine in soil is influenced by factors such as climate, type of ecosystem and the topography. It is suggested that net-changes in the storage of organic chlorine are of importance for the transport of chloride, which implies that the biogeochemical cycle of chlorine should be addressed.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2000. 55 p.
Series
Linköping Studies in Arts and Science, ISSN 0282-9800 ; 210
National Category
Social Sciences Interdisciplinary
Identifiers
urn:nbn:se:liu:diva-35039 (URN)24714 (Local ID)91-7219-724-2 (ISBN)24714 (Archive number)24714 (OAI)
Public defence
2000-09-15, Sal Elysion, Hus-T, Universitetsområdet Valla, Linköping, 10:15 (Swedish)
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2014-09-12Bibliographically approved

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Hjelm, OlofJohansson, EmmaÖberg, Gunilla

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Environmental Technique and ManagementThe Institute of TechnologyDepartment of Water and Environmental StudiesFaculty of Arts and Sciences
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