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Interannual Variability of Low-Molecular Metabolite Composition in Ceratophyllum demersum (Ceratophyllaceae) from a Floodplain Lake with a Changeable Trophic Status

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Contemporary Problems of Ecology Aims and scope

Abstract

The regularities that shape the composition of low molecular weight organic compounds (LMWOCs) in aquatic macrophytes in response to aquatic environment alterations remain poorly characterized. The aim of the present study consists of a comparative interannual investigation into LMWOC composition in rigid hornwort (Ceratophyllum demersum L.) from a Volga-Akhtuba floodplain lake with a variable trophic state. A high variability of LMWOC composition and individual compound levels in hornwort is detected as different trophic states of the water body are analyzed. Active allelochemicals are the predominant LMWOCs in the case of a “macrophytic” mesotrophic state of the lake, with fatty acids (the free fatty acid fraction) apparently being the most important in this group. Hornwort LMWOC composition in the case of a “cyanobacterial” eutrophic type of lake development is characterized by the predomination of compounds that enhance the protective reactions (manool being the most important) under the conditions of suppression by cyanobacteria, which is also manifested as an almost twofold decrease in the overall intensity of organiccompound biosynthesis.

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  1. Institute of Limnology, Russian Academy of Sciences, St. Petersburg, 196105, Russia

    E. A. Kurashov & G. G. Mitrukova

  2. Berg State Research Institute of Lake and River Fisheries, St. Petersburg, 199053, Russia

    J. V. Krylova

  3. Saint Petersburg State Chemicopharmaceutical Academy, St. Petersburg, 197376, Russia

    G. G. Mitrukova

  4. ITMO University, St. Petersburg, 197101, Russia

    E. A. Kurashov & J. V. Krylova

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Original Russian Text © E.A. Kurashov, G.G. Mitrukova, J.V. Krylova, 2018, published in Sibirskii Ekologicheskii Zhurnal, 2018, No. 2, pp. 207–224.

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Kurashov, E.A., Mitrukova, G.G. & Krylova, J.V. Interannual Variability of Low-Molecular Metabolite Composition in Ceratophyllum demersum (Ceratophyllaceae) from a Floodplain Lake with a Changeable Trophic Status. Contemp. Probl. Ecol. 11, 179–194 (2018). https://doi.org/10.1134/S1995425518020063

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