Influence of extrametabolites of marine microalgae on the reproduction of the bacterium Listeria monocytogenes

Terekhova, V. E.; Айздайчер, Н. А.; Бузолева, Л. С.; Somov, G. P.

doi:10.1134/s1063074009040129

Cited by 16 publications

(5 citation statements)

References 6 publications

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“…Such antimicrobial activity of Skeletonema costatum , recently renamed to S. marinoi [ 25 ], was lately observed. This alga produced antimicrobial substances particularly during the steady-state growth phase [ 26 ] that could explain the observed trend in bacterial abundance ( Figure 3 A). We can conclude, however, that this effect is not due to the PUA of S. marinoi , since comparable concentrations in the first days of the PUA+ treatment had no effect on the bacterial abundance, and actual measurements of bacterial production showed highest values in PUA+ (not shown).…”

Section: Discussionmentioning

confidence: 99%

Diatom Derived Polyunsaturated Aldehydes Do Not Structure the Planktonic Microbial Community in a Mesocosm Study

et al. 2012

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Several marine and freshwater diatoms produce polyunsaturated aldehydes (PUA) in wound-activated processes. These metabolites are also released by intact diatom cells during algal blooms. Due to their activity in laboratory experiments, PUA are considered as potential mediators of diatom-bacteria interactions. Here, we tested the hypothesis that PUA mediate such processes in a close-to-field mesocosm experiment. Natural plankton communities enriched with Skeletonema marinoi strains that differ in their PUA production, a plankton control, and a plankton control supplemented with PUA at natural and elevated concentrations were observed. We monitored bacterial and viral abundance as well as bacterial community composition and did not observe any influence of PUA on these parameters even at elevated concentrations. We rather detected an alternation of the bacterial diversity over time and differences between the two S. marinoi strains, indicating unique dynamic bacterial communities in these algal blooms. These results suggest that factors other than PUA are of significance for interactions between diatoms and bacteria.

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Section: Discussionmentioning

confidence: 99%

Diatom Derived Polyunsaturated Aldehydes Do Not Structure the Planktonic Microbial Community in a Mesocosm Study

et al. 2012

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“…In some cases, the antibacterial activity of microalgae can be induced by the presence of bacteria in the vicinity of the microalgae, or can be constitutive and always present in the algal culture medium [ 61 ]. The constitutive production of antibacterial exometabolites by some microalgae was highlighted with the growth diminution of Listeria monocytogenes in co-culture with the cell-free culture media of S. costatum [ 127 ].…”

Section: Antibacterial Activity From Microalgaementioning

confidence: 99%

“…The development stage of the algal culture is also highly significant as it is assumed that various secondary metabolites are produced and released in the medium at different growth phases [ 1 ]. Terekhova et al showed that only the exometabolites produced by S. costatum during the middle steady-state growth phase presented an antibacterial activity against L. monocytogenes while compounds released during the exponential growth phase had no effect on these bacteria [ 127 ]. Cooper et al have also demonstrated the direct relation between cell growth phase and antibacterial activity, and showed that P. tricornutum presented a better activity against a wide spectrum of marine bacteria during the exponential growth phase compared to the stationary phase, while the reverse relationship was found for S. costatum [ 81 ].…”

Section: Antibacterial Activity From Microalgaementioning

confidence: 99%

Antimicrobial Compounds from Eukaryotic Microalgae against Human Pathogens and Diseases in Aquaculture

et al. 2016

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The search for novel compounds of marine origin has increased in the last decades for their application in various areas such as pharmaceutical, human or animal nutrition, cosmetics or bioenergy. In this context of blue technology development, microalgae are of particular interest due to their immense biodiversity and their relatively simple growth needs. In this review, we discuss about the promising use of microalgae and microalgal compounds as sources of natural antibiotics against human pathogens but also about their potential to limit microbial infections in aquaculture. An alternative to conventional antibiotics is needed as the microbial resistance to these drugs is increasing in humans and animals. Furthermore, using natural antibiotics for livestock could meet the consumer demand to avoid chemicals in food, would support a sustainable aquaculture and present the advantage of being environmentally friendly. Using natural and renewable microalgal compounds is still in its early days, but considering the important research development and rapid improvement in culture, extraction and purification processes, the valorization of microalgae will surely extend in the future.

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“…Many bacteria show a chemotactic response, often regulated by amino acids, towards algal culture filtrates or exudates (Bell and Mitchell, 1972;Barbara and Mitchell, 2003;Stocker and Seymour, 2012). Besides algae releasing stimulatory substances (Terekhova et al, 2009;Natrah et al, 2014), there are many able to produce bactericidal or bacteriostatic compounds . These latter are of huge biotechnological interest in the search for new antibiotics (Senhorinho et al, 2015;Falaise et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Tetraselmis suecica F&M‐M33 growth is influenced by its associated bacteria

Biondi

Cheloni

Rodolfi

et al. 2017

Microbial Biotechnology

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SummaryAlgal cultures are usually co‐cultures of algae and bacteria, especially when considering outdoor mass cultivation. The influence of associated bacteria on algal culture performance has been poorly investigated, although bacteria may strongly affect biomass (or derived product) yield and quality. In this work, the influence on growth and productivity of Tetraselmis suecica F&M‐M33 of bacterial communities and single bacterial isolates from the algal phycosphere was investigated. Xenic laboratory and outdoor cultures were compared with an axenic culture in batch. The presence of the bacterial community significantly promoted culture growth. Single bacterial isolates previously found to be strictly associated with T. suecica F&M‐M33 also increased growth compared with the axenic culture, whereas loosely associated and common seawater bacteria induced variable growth responses, from positive to detrimental. The increased growth was mainly evidenced as increased algal biomass production and cell size, and occurred after exhaustion of nutrients. This finding is of interest for biofuel production from microalgae, often attained through nutrient starvation processes leading to oil or carbohydrate accumulation. As axenic T. suecica F&M‐M33 showed a similar growth with or without vitamins, the most probable mechanism behind bacterial positive influence on algal growth seems nutrient recycling.

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Influence of extrametabolites of marine microalgae on the reproduction of the bacterium Listeria monocytogenes

Cited by 16 publications

References 6 publications

Diatom Derived Polyunsaturated Aldehydes Do Not Structure the Planktonic Microbial Community in a Mesocosm Study

Diatom Derived Polyunsaturated Aldehydes Do Not Structure the Planktonic Microbial Community in a Mesocosm Study

Antimicrobial Compounds from Eukaryotic Microalgae against Human Pathogens and Diseases in Aquaculture

Tetraselmis suecica F&M‐M33 growth is influenced by its associated bacteria

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