Biochemistry and genetics of taste- and odor-producing cyanobacteria

Watson, Susan B.; Monis, Paul; Baker, Peter; Giglio, Steven

doi:10.1016/j.hal.2015.11.008

Cited by 178 publications

(139 citation statements)

References 159 publications

(165 reference statements)

Supporting

Mentioning

131

Contrasting

Unclassified

Order By: Relevance

“…Freshwater harmful algal blooms (HABs) are generally caused by cyanobacteria (Lopez et al, 2008). Large-scale blooms are considered unsightly and may cause foul odors (Watson et al, 2016), and many cyanobacteria may also produce toxic secondary metabolites (Wiegand and Pflugmacher, 2005). The negative effects of cyanobacterial toxins (cyanotoxins) have been observed for over a century (Francis, 1878) and, in terms of impacts to humans, include interruptions to municipal water supplies, closures of recreational sites, and illness (Griffiths and Saker, 2003;Bullerjahn et al, 2016;Svirčev et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

A Global Analysis of the Relationship between Concentrations of Microcystins in Water and Fish

2018

View full text Add to dashboard Cite

Cyanobacteria, the primary bloom-forming organisms in fresh water, elicit a spectrum of problems in lentic systems. The most immediate concern for people and animals are cyanobacterial toxins, which have been detected at variable concentrations in water and fish around the world. Cyanotoxins can transfer through food webs, potentially increasing the risk of exposure to people who eat fish from affected waters, yet little is known about how cyanotoxins fluctuate in wild fish tissues. We collated existing studies on cyanotoxins in fish and fresh water from lakes around the world into a global dataset to test the hypothesis that cyanotoxin concentrations in fish increase with water toxin concentrations. We limited our quantitative analysis to microcystins because data on other cyanotoxins in fish were sparse, but we provided a qualitative summary of other cyanotoxins reported in wild, freshwater fish tissues. We found a positive relationship between intracellular microcystin in water samples and microcystin in fish tissues that had been analyzed by assay methods (enzyme-linked immunosorbent assay and protein phosphatase inhibition assay). We expected microcystin to be found in increasingly higher concentrations from carnivorous to omnivorous to planktivorous fishes. We found, however, that omnivores generally had the highest tissue microcystin concentrations. Additionally, we found contrasting results for the level of microcystin in different tissue types depending on the toxin analysis method. Because microcystin and other cyanotoxins have the potential to impact public health, our results underline the current need for comprehensive and uniform detection methods for the analysis of cyanotoxins in complex matrices.

show abstract

Section: Introductionmentioning

confidence: 99%

A Global Analysis of the Relationship between Concentrations of Microcystins in Water and Fish

2018

View full text Add to dashboard Cite

show abstract

“…Geosmin and 2-MIB are produced by some cyanobacteria and actinomycetes [4]. Cyanobacteria that have been associated with OCs include Anabaena, Aphanizomenon, Lyngbya, Oscillatoria, Phormidium, Planktothrix, and Pseudanabaena [5]. Anabaena is a common geosmin-producing genus in eutrophic lakes and rivers [6,7].…”

Section: Introductionmentioning

confidence: 99%

Effects of Environmental Factors on Cyanobacterial Production of Odorous Compounds: Geosmin and 2-Methylisoborneol

Lee

Srivastava

et al. 2017

Journal of Microbiology and Biotechnology

View full text Add to dashboard Cite

Geosmin and 2-methylisoborneol (2-MIB), responsible for earthy or musty smell, are a major concern for safe drinking water supplies. This study investigated the effects of environmental factors on odorous compound production and cell growth in cyanobacterial strains. sp. FACHB-1384, a 2-MIB producer, was sensitive to low temperature (<20°C). However, geosmin producers, sp. Chusori and sp. NIER, were sensitive to high light intensity (>100 μmol/m/sec), but not to low temperature. Geosmin concentrations increased under higher nitrate concentrations, being linearly proportional to cell density. A P-limited chemostat showed that P-stress decreased the geosmin productivity and extracellular geosmin amount per cell in sp. NIER. However, only 2-MIB productivity was reduced in sp. FACHB-1374 under P-limitation. The extracellular 2-MIB amount per cell remained constant at all dilution rates. In conclusion, high light intensity and P-stress can contribute to the lower incidence of geosmin, whereas 2-MIB reduction could be attainable at a lower temperature.

show abstract

“…During the spring outbreak (Figure ; grey ellipse), some bacteria belonging to Actinobacteria are more closely related to high MIB detections under conditions closely similar to GSM‐producing cyanobacteria. Vectors corresponding to off‐flavor metabolites also point out to May samples included in the shaded area, with MIB pointing toward the cloud of Actinobacteria such as Saccharopolyspora (Komatsu et al, ; Watson et al, ) and Streptomyces (Saadoun et al, ) and GSM pointing toward spring‐blooming Cyanobacteria, such as Microcoleus (Izaguirre & Taylor, ), Phormidium (Izaguirre & Taylor, ), and Planktothrix (Kutovaya & Watson, ). This observed pattern grouping Cyanobacteria with GSM and Actinobacteria with MIB confirms the results from the Spearman's rho test (Table ).…”

Section: Resultsmentioning

confidence: 99%

Influence of Environmental Factors on the Production of MIB and Geosmin Metabolites by Bacteria in a Eutrophic Reservoir

Clercin

Druschel

2019

Water Resources Research

View full text Add to dashboard Cite

Occurrences of odorous bacterial metabolites, 2‐methylisoborneol (MIB) and geosmin (GSM), in drinking water supply reservoirs are considered as a nuisance by the water industry and a source of complaints from customers. In Eagle Creek Reservoir, routine monitoring programs of MIB and GSM highlight intense odorous outbreaks during the spring season when high inflow discharges occur. Cyanobacteria have always been assumed to be source of these metabolites even if no known producers are present in raw water. A copper‐based algaecide is often used to terminate the metabolite production and the algal growth in the reservoir. The current study was designed to investigate and identify other biological sources involved in the biosynthesis of MIB and GSM metabolites as well as environmental factors that could be important triggers for the growth of bacterial producers. The community structure of the bacterioplankton was determined using a 16S rRNA gene sequencing technique, which showed that not only Cyanobacteria but Actinobacteria also were involved in the reservoir internal production. Planktothrix species was identified as the main source of GSM (p < 0.001) while Streptomyces (Actinobacteria) was very likely responsible of MIB (p < 0.01). Application of an algaecide disrupted GSM and the growth of Planktothrix but was less effective against MIB and Streptomyces. Statistical analyses revealed that MIB‐ and GSM‐causing bacteria were found abundant when the water was enriched with nitrogen, temperature cooler, and the water column mixed.

show abstract

Biochemistry and genetics of taste- and odor-producing cyanobacteria

Cited by 178 publications

References 159 publications

A Global Analysis of the Relationship between Concentrations of Microcystins in Water and Fish

A Global Analysis of the Relationship between Concentrations of Microcystins in Water and Fish

Effects of Environmental Factors on Cyanobacterial Production of Odorous Compounds: Geosmin and 2-Methylisoborneol

Influence of Environmental Factors on the Production of MIB and Geosmin Metabolites by Bacteria in a Eutrophic Reservoir

Contact Info

Product

Resources

About