No 16 (2017): Ukrainian Antarctic Journal


T. Bedernichek
M. M. Gryshko National Botanic Garden, National Academy of Sciences of Ukraine, Kyiv
N. Zaimenko
M. M. Gryshko National Botanic Garden, National Academy of Sciences of Ukraine, Kyiv
R. Ivannikov
M. M. Gryshko National Botanic Garden, National Academy of Sciences of Ukraine, Kyiv
V. Loya
M. M. Gryshko National Botanic Garden, National Academy of Sciences of Ukraine, Kyiv
V. Anishchenko
M. M. Gryshko National Botanic Garden, National Academy of Sciences of Ukraine, Kyiv
T. Partyka
Institute of Agriculture of Carpathian region, National Academy of Agrarian Sciences of Ukraine, Obroshyne
P. Khoyetskyy
National Forestry University of Ukraine, Lviv
Published June 5, 2018
  • Desсhampsia antarctica,
  • Desсhampsia cespitosa,
  • low-molecular-weight organic compounds,
  • phenols,
  • water-soluble organic matter


Antarctic hairgrass Desсhampsia antarctica (Poaceae) is an important ecosystem engineer in coastal Antarctica and significantly affects properties and composition of soil organic matter. The objective of this study was to determine content and composition of low-molecular-weight organic compounds in humus-turf horizon of leptosol under D. antarctica and in alfisol under D. cespitosa. Comparison of soil organic matter under these closely related species is important to find the markers typical for Antarctic soils only. Methods of high-performance liquid chromatography for determination of phenols, phenol carboxylic, phenyl carboxylic, hydroxybenzoic acids, coumarin derivatives and flavonoids were used. Results of this study showed that samples of the humus-sod horizon Hd of the soil under D. antarctica and D. cespitosa had almost similar pH (H2O), pH (CaCl2) and specific electrical conductivity values. Organic carbon content in soils under D. antarctica and D. cespitosa differed insignificantly – from 101 to 114 mg∙g-1. The investigated soils contain approximately the same amount of phenols and phenol carboxylic acids, as well as hydroxybenzoic acid. At the same time, less phenyl carboxylic acids and much less flavonoids were detected in the soil under D. cespitosa. In addition, there were no coumarin derivatives under D. cespitosa, but about 50 μg∙g-1 of these substances were found in initial Antarctic soil. All the classes of organic substances mentioned above are biologically active and can significantly affect soil and determine different processes in it. Thus, it can be concluded that observed differences were probably caused not only by environmental conditions but by the life cycle of D. antarctica. High content of phenyl carboxylic acids and coumarin derivatives in soil under this plant species indicates different pattern of transformation of soil organic matter; however further studies are required to support this idea.


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