Publikation: Allelopathic activity of Ceratophyllum demersum L. and Najas marina ssp. intermedia (Wolfgang) Casper
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2003
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Hydrobiologia. 2003, 506(1/3), pp. 583-589. ISSN 0018-8158. eISSN 1573-5117
Zusammenfassung
We investigated the allelopathic activity of two submersed macrophytes with different growth forms and nutrient uptake modes, Ceratophyllum demersum and Najas marina ssp. intermedia. A bioassay-directed method development revealed optimal extraction solvents for allelochemicals from both macrophytes. For Najas, 50% methanol and for Ceratophyllum 50% acetone yielded the strongest inhibition in the agar-diffusion assay with various filamentous or chroococcal cyanobacteria as target species. Further fractionation by liquid liquid extraction (LLE) and solid phase extraction (SPE) procedures showed that both aquatic plants appear to have more than one active fraction, one being hydrophilic and one moderately lipophilic. The water-soluble allelochemicals may inhibit phytoplankton whereas the lipophilic allelochemicals may act through direct cell cell contact, e.g., against epiphytes. Bothmacrophytes also exuded allelopathically active compounds into the surrounding medium as shown by SPE of their incubation water.
Zusammenfassung in einer weiteren Sprache
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570 Biowissenschaften, Biologie
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allelochemical, allelopathy, aquatic angiosperm, cyanobacteria, exudation, submersed macrophyte
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GROSS, Elisabeth, Daniela ERHARD, Enikö IVÁNYI, 2003. Allelopathic activity of Ceratophyllum demersum L. and Najas marina ssp. intermedia (Wolfgang) Casper. In: Hydrobiologia. 2003, 506(1/3), pp. 583-589. ISSN 0018-8158. eISSN 1573-5117BibTex
@article{Gross2003Allel-6666,
year={2003},
title={Allelopathic activity of Ceratophyllum demersum L. and Najas marina ssp. intermedia (Wolfgang) Casper},
number={1/3},
volume={506},
issn={0018-8158},
journal={Hydrobiologia},
pages={583--589},
author={Gross, Elisabeth and Erhard, Daniela and Iványi, Enikö}
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<dcterms:abstract xml:lang="eng">We investigated the allelopathic activity of two submersed macrophytes with different growth forms and nutrient uptake modes, Ceratophyllum demersum and Najas marina ssp. intermedia. A bioassay-directed method development revealed optimal extraction solvents for allelochemicals from both macrophytes. For Najas, 50% methanol and for Ceratophyllum 50% acetone yielded the strongest inhibition in the agar-diffusion assay with various filamentous or chroococcal cyanobacteria as target species. Further fractionation by liquid liquid extraction (LLE) and solid phase extraction (SPE) procedures showed that both aquatic plants appear to have more than one active fraction, one being hydrophilic and one moderately lipophilic. The water-soluble allelochemicals may inhibit phytoplankton whereas the lipophilic allelochemicals may act through direct cell cell contact, e.g., against epiphytes. Bothmacrophytes also exuded allelopathically active compounds into the surrounding medium as shown by SPE of their incubation water.</dcterms:abstract>
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