The effects of cyanobacterial bloom extracts on the biomass, Chl-a, MC and other oligopeptides contents in a natural Planktothrix agardhii population

Magdalena Toporowska , Hanna Mazur-Marzec , Barbara Pawlik-Skowrońska

Abstract

Blooms of the cyanobacterium Planktothrix agardhii are common in shallow, eutrophic freshwaters. P. agardhii may produce hepatotoxic microcystins (MCs) and many other bioactive secondary metabolites belonging mostly to non-ribosomal oligopeptides. The aim of this work was to study the effects of two extracts (Pa-A and Pa-B) of P. agardhii-predominated bloom samples with different oligopeptide profiles and high concentration of biogenic compounds on another natural P. agardhii population. We hypothesised that the P. agardhii biomass and content of oligopeptides in P. agardhii is shaped in a different manner by diverse mixtures of metabolites of different P. agardhii-dominated cyanobacterial assemblages. For this purpose, the biomass, chlorophyll a and oligopeptides content in the treated P. agardhii were measured. Seven-day microcosm experiments with four concentrations of the extracts Pa-A and Pa-B were carried out. Generally, aeruginosins (AERs), cyanopeptolins (CPs) and anabaenopeptins (APs) were the most numerous peptides; however, only 16% of them were common for both extracts. The addition of the extracts resulted in similar effects on P. agardhii: an increase in biomass, Chl-a and MC content in the exposed P. agardhii as well as changes in its oligopeptide profile were observed. MCs present in the extracts did not inhibit accumulation of P. agardhii biomass, and did not have any negative effect on MC and Chl-a content. No evidence for bioaccumulation of dissolved peptides in the P. agardhii exposed was found. As the two tested extracts differed considerably in oligopeptide composition, but contained similar high concentrations of nutrients, it seems that biogenic compounds, not oligopeptides themselves, positively influenced the mixed natural P. agardhii population.
Author Magdalena Toporowska
Magdalena Toporowska,,
-
, Hanna Mazur-Marzec (FOG / IO / DMarB)
Hanna Mazur-Marzec,,
- Division of Marine Biotechnology
, Barbara Pawlik-Skowrońska
Barbara Pawlik-Skowrońska ,,
-
Journal seriesInternational Journal of Environmental Research and Public Health, ISSN 1661-7827, e-ISSN 1660-4601, (N/A 70 pkt)
Issue year2020
Vol17
No8
Pages1-19
Publication size in sheets0.9
Article number2881
Keywords in Englishcyanobacteria, cyanotoxins, microcystins, aeruginosins, anabaenopeptins, cyanopeptolins, non-ribosomal peptides, chemotypes
ASJC Classification2739 Public Health, Environmental and Occupational Health; 2307 Health, Toxicology and Mutagenesis
DOIDOI:10.3390/ijerph17082881
URL https://www.mdpi.com/1660-4601/17/8/2881
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 22-04-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.129; WoS Impact Factor: 2018 = 2.468 (2) - 2018=2.948 (5)
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