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Article

Evidence of Quorum Sensing in Cyanobacteria by Homoserine Lactones: The Origin of Blooms

Group of Organic Chemistry Natural Products, Institute of Chemistry, Universidad de Antioquia, Medellin 050010, Colombia
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Academic Editors: Naresh Singhal and Helvi Heinonen-Tanski
Water 2021, 13(13), 1831; https://doi.org/10.3390/w13131831
Received: 28 April 2021 / Revised: 24 June 2021 / Accepted: 25 June 2021 / Published: 30 June 2021
(This article belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
Although several theories have been postulated to explain cyanobacterial blooms, their biochemical origin has not yet been found. In this work, we explore the existence of bacterial communication, called quorum sensing, in Microcystis aeruginosa and Cylindrospermopsis raciborskii. Thus, the application of several known acylhomoserine lactones to cultures of both cyanobacteria causes profound metabolic. At 72 h post-application, some of them produced substantial increases in cell proliferation, while others were inhibitors. There was a correlation with colony-forming activity for most of them. According to ELISA analysis, the microcystin levels were increased with some lactones. However, there was a clear difference between M. aeruginosa and C. raciborskii culture since, in the first one, there was an inducing effect on cell proliferation, while in C. raciborskii, the effects were minor. Besides, there were compound inhibitors and inducers of microcystins production in M. aeruginosa, but almost all compounds were only inducers of saxitoxin production in C. raciborskii. Moreover, each lactone appears to be involved in a specific quorum sensing process. From these results, the formation of cyanobacterial blooms in dams and reservoirs could be explained since lactones may come from cyanobacteria and other sources as bacterial microflora-associated or exogenous compounds structurally unrelated to lactones, such as drugs, industrial effluents, and agrochemicals. View Full-Text
Keywords: cyanobacteria; Microcystis aeruginosa; Cylíndridrospermopsis raciborskii; blooms; proliferation; toxin; Quorum Sensing; autoinducers lactones cyanobacteria; Microcystis aeruginosa; Cylíndridrospermopsis raciborskii; blooms; proliferation; toxin; Quorum Sensing; autoinducers lactones
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MDPI and ACS Style

Herrera, N.; Echeverri, F. Evidence of Quorum Sensing in Cyanobacteria by Homoserine Lactones: The Origin of Blooms. Water 2021, 13, 1831. https://doi.org/10.3390/w13131831

AMA Style

Herrera N, Echeverri F. Evidence of Quorum Sensing in Cyanobacteria by Homoserine Lactones: The Origin of Blooms. Water. 2021; 13(13):1831. https://doi.org/10.3390/w13131831

Chicago/Turabian Style

Herrera, Natalia, and Fernando Echeverri. 2021. "Evidence of Quorum Sensing in Cyanobacteria by Homoserine Lactones: The Origin of Blooms" Water 13, no. 13: 1831. https://doi.org/10.3390/w13131831

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