Allelopathic effects of Microcystis aeruginosa on green algae and a diatom: Evidence from exudates addition and co-culturing

Wang, Longchang; Zi, Jinmei; Xu, Runbing; Hilt, Sabine; Hou, Xiuli; Xu, Chunju

doi:10.1016/j.hal.2016.11.010

Cited by 79 publications

(35 citation statements)

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“…Disentangle when the observed growth responses are caused by allelochemicals or by the costs associated to the production of compounds is an important and critical question but would require further investigations on the nature of released compounds. Our experiment is consistent with other studies showing that exudates of Microcystis can influence the physiology of other cyanobacteria (Bartova et al ., ; Yang et al ., ; Maria et al ., ) or green algae (Bittencourt‐Oliveira et al ., ; Ma et al ., ; Dunker et al ., ; Song et al ., ; Wang et al ., ). Exposure of Microcystis strains may result in various effects on the targeted organism ranging from alteration of growth and cellular morphology, photosynthesis, changes in pigment, protein, increased formation of reactive oxygen species, activation of gene expression or cell lysis.…”

Section: Discussionmentioning

confidence: 97%

“…Direct cultivation of strains/species allowing cell-to-cell interaction is a more realistic approach to mimic interspecific interaction. Recent studies have shown stronger growth inhibition in green algae and diatoms in direct co-cultivation with M. aeruginosa than in membrane-separated co-culture or with cyanobacteria exudates (Dunker et al, 2013;Wang et al, 2017). However, direct co-cultivation does not as easily allow for monitoring the respective physiological and metabolic responses of both interacting organisms.…”

Section: Discussionmentioning

confidence: 99%

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Chemically mediated interactions between Microcystis and Planktothrix: impact on their growth, morphology and metabolic profiles

Briand

Reubrecht

Mondeguer

et al. 2019

Environmental Microbiology

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Summary Freshwater cyanobacteria are known for their ability to produce bioactive compounds, some of which have been described as allelochemicals. Using a combined approach of co‐cultures and analyses of metabolic profiles, we investigated chemically mediated interactions between two cyanobacterial strains, Microcystis aeruginosa PCC 7806 and Planktothrix agardhii PCC 7805. More precisely, we evaluated changes in growth, morphology and metabolite production and release by both interacting species. Co‐culture of Microcystis with Planktothrix resulted in a reduction of the growth of Planktothrix together with a decrease of its trichome size and alterations in the morphology of its cells. The production of intracellular compounds by Planktothrix showed a slight decrease between monoculture and co‐culture conditions. Concerning Microcystis, the number of intracellular compounds was higher under co‐culture condition than under monoculture. Overall, Microcystis produced a lower number of intracellular compounds under monoculture than Planktothrix, and a higher number of intracellular compounds than Planktothrix under co‐culture condition. Our investigation did not allow us to identify specifically the compounds causing the observed physiological and morphological changes of Planktothrix cells. However, altogether, these results suggest that co‐culture induces specific compounds as a response by Microcystis to the presence of Planktothrix. Further studies should be undertaken for identification of such potential allelochemicals.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Chemically mediated interactions between Microcystis and Planktothrix: impact on their growth, morphology and metabolic profiles

Briand

Reubrecht

Mondeguer

et al. 2019

Environmental Microbiology

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show abstract

“…Studies have shown that cyanobacteria can also affect the growth of some Chlorophyceae and Charophyceae species [13,[50][51][52][58][59][60][61][62][63] and picoplanktonic cyanobacteria deserved special attention here.Śliwińska-Wilczewska et al [22] demonstrated that both the addition of Synechococcus sp. cell-free filtrate and co-culture inhibited the growth of Stichococcus bacillaris Nägeli.…”

Section: Discussionmentioning

confidence: 99%

The Importance of Allelopathic Picocyanobacterium Synechococcus sp. on the Abundance, Biomass Formation, and Structure of Phytoplankton Assemblages in Three Freshwater Lakes

Bubak

Śliwińska‐Wilczewska

Głowacka

et al. 2020

Toxins

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The contribution of picocyanobacteria to summer phytoplankton blooms, accompanied by an ecological crisis, is a new phenomenon in Europe. This issue requires careful investigation. We studied allelopathic activity of freshwater picocyanobacterium Synechococcus sp. on phytoplankton assemblages from three freshwater lakes. In this study, the allelopathic activity of the Synechococcus sp. on the total abundance, biomass, as well as structure of the phytoplankton assemblages were investigated. Our results indicated that addition of exudates obtained from Synechococcus sp. affected the number of cells and biomass of the phytoplankton communities; the degree of inhibition or stimulation was different for each species, causing a change in the phytoplankton abundance and dominance during the experiment. We observed that some group of organisms (especially cyanobacteria from the genus Aphanothece, Limnothrix, Microcystis, and Synechococcus) showed tolerance for allelopathic compounds produced and released by Synechococcus sp. It is also worth noting that in some samples, Bacillariophyceae (e.g., Amphora pediculus, Navicula pygmaea, and Nitzschia paleacea) were completely eliminated in the experimental treatments, while present in the controls. This work demonstrated that the allelopathic activity exhibited by the Synechococcus sp. is probably one of the major competitive strategies affecting some of the coexisting phytoplankton species in freshwater ecosystems. To our best knowledge this is the first report of the allelopathic activity of Synechococcus sp. in the freshwater reservoirs, and one of the few published works showing allelopathic properties of freshwater picocyanobacteria on coexisting phytoplankton species.

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“…After the addition of cell-free filtrate, the highest decline in P m was observed for S. marinoi (Figure 3 and filtrate had no allelopathic effects on the growth of O. submarina. Some authors also showed that cyanobacteria have a negative effect on green algae, diatoms, and other cyanobacteria (e.g., Bittencourt-Oliveira et al, 2014;Ma et al, 2015;Śliwińska-Wilczewska et al, 2016;Wang et al, 2017;Żak, Musiewicz, & Kosakowska, 2012). Allelopathy affects phytoplankton succession and competition because it gives a competitive advantage to the allelopathic species and/or the resistant targets organisms (Granéli & Hansen, 2006).…”

Section: Effects Of Picocyanobacterial Filtrates On Photosynthetic mentioning

confidence: 99%

“…Allelopathy affects phytoplankton succession and competition because it gives a competitive advantage to the allelopathic species and/or the resistant targets organisms (Granéli & Hansen, 2006). Both the tolerance shown by some organisms, and the differential effect of allelochemicals on each target species (e.g., Barreiro et al, 2017;Śliwińska-Wilczewska et al, 2017;Suikkanen et al, 2004;Wang et al, 2017) suggest that coevolution must be occurring. In addition, Fistarol, Legrand, and Granéli (2003) showed an example of a behavioral strategy of target species exposed to allelopathic compounds that could be used as a defense mechanism.…”

Section: Effects Of Picocyanobacterial Filtrates On Photosynthetic mentioning

confidence: 99%

Allelopathic activity of the bloom‐forming picocyanobacterium Synechococcus sp. on the coexisting microalgae: The role of eutrophication

Śliwińska‐Wilczewska

Latała

2018

Internat Rev Hydrobiol

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Allelopathic picocyanobacteria have been responsible for harmful incidents with severe ecological impacts in many parts of the world. The allelopathic interactions that have been shown to be implied in the dominance of various species of phytoplankton, forming massive blooms, are influenced by environmental factors such as nutrient concentration. This study aims to determine in what extent the allelopathic activity of the bloom‐forming picocyanobacterium Synechococcus sp. is impacted by water stoichiometry. We measured the allelopathic activity of Synechococcus sp. on growth, chlorophyll fluorescence, and photosynthetic performance of green algae Chlorella vulgaris and Oocystis submarina and diatoms Bacillaria paxillifer and Skeletonema marinoi by addition of cell‐free filtrate obtained from cultures growing in nutrient‐sufficient (NP), nitrogen‐deficient (−N), or phosphorus‐deficient (−P) culture medium. These studies indicated that sufficient amounts of nutrients affected the picocyanobacterium increasing its production of allelochemicals. Conversely, the weakest allelopathic activity was recorded after the addition of a filtrate obtained from Synechococcus sp. grown at −N medium. The highest decline in growth, the maximum quantum yield of photosystem II (PSII) photochemistry (Fv/Fm) and the photosynthetic capacity (Pm) were observed for diatom S. marinoi. On the other hand, Synechococcus sp. filtrate had no allelopathic effects on O. submarina. While confirming the allelopathic activity of Synechococcus sp. these findings show that production of allelopathic substances is influenced by the availability of nutrients.

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Allelopathic effects of Microcystis aeruginosa on green algae and a diatom: Evidence from exudates addition and co-culturing

Cited by 79 publications

References 50 publications

Chemically mediated interactions between Microcystis and Planktothrix: impact on their growth, morphology and metabolic profiles

Chemically mediated interactions between Microcystis and Planktothrix: impact on their growth, morphology and metabolic profiles

The Importance of Allelopathic Picocyanobacterium Synechococcus sp. on the Abundance, Biomass Formation, and Structure of Phytoplankton Assemblages in Three Freshwater Lakes

Allelopathic activity of the bloom‐forming picocyanobacterium Synechococcus sp. on the coexisting microalgae: The role of eutrophication

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