Allelopathic activity of Ceratophyllum demersum L. and Najas marina ssp. intermedia (Wolfgang) Casper
By E. Gross, D. Erhard, E. Iványi. Hydrobiologia, 2003
176 citations recorded by the source corpus.
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. Both macrophytes also exuded allelopathically active compounds into the surrounding medium as shown by SPE of their incubation water.
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Citations in the corpus
- The allelopathy and allelopathic mechanism of phenolic acids on toxic Microcystis aeruginosa (2010, background): “Over the past 20 years, there has been significant interest for the growth inhibition of cyanobacteria by allelochemicals released by aquatic macrophytes (Gross et al. 2003; Zhang et al. 2007a) and it has been demonstrated that many aquatic macrophytes secrete allelopathic substances against cyanoba”
- Effects of macrophyte heterogeneity and food availability on structural parameters of the macroinvertebrate community in a Pampean stream (2011, background): “effect of structural heterogeneity on epiphytes (Gross et al., 2003).”