Ecological importance of cyanobacteria

Dı́ez, Beatriz; Ininbergs, Karolina

doi:10.1002/9781118402238.ch3

Cited by 23 publications

(17 citation statements)

References 227 publications

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“…Growing concerns about environmental pollution issues and demands for alternative energy have stimulated photosynthetic organisms emerging as powerful platforms converting CO 2 to various biobased products. As one of the oldest living phyla (Schopf and Packer, 1987), cyanobacteria are oxygenic photosynthetic autotrophic bacteria widely distributed in aquatic and terrestrial habitats (Díez and Ininbergs, 2014). They play a crucial role in the biogeochemical cycles of carbon and nitrogen with the capacity of fixing carbon dioxide and atmospheric nitrogen (Parmar et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic Conversion of CO2 Into Pinene Using Engineered Synechococcus sp. PCC 7002

Yang

Zhu

et al. 2021

Front. Bioeng. Biotechnol.

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Metabolic engineering of cyanobacteria has received much attention as a sustainable strategy to convert CO2 to various longer carbon chain fuels. Pinene has become increasingly attractive since pinene dimers contain high volumetric energy and have been proposed to act as potential aircraft fuels. However, cyanobacteria cannot directly convert geranyl pyrophosphate into pinene due to the lack of endogenous pinene synthase. Herein, we integrated the gene encoding Abies grandis pinene synthase into the model cyanobacterium Synechococcus sp. PCC 7002 through homologous recombination. The genetically modified cyanobacteria achieved a pinene titer of 1.525 ± 0.l45 mg L−1 in the lab-scale tube photobioreactor with CO2 aeration. Specifically, the results showed a mixture of α- and β-pinene (∼33:67 ratio). The ratio of β-pinene in the product was significantly increased compared with that previously reported in the engineered Escherichia coli. Furthermore, we investigated the photoautotrophic growth performances of Synechococcus overlaid with different concentrations of dodecane. The work demonstrates that the engineered Synechococcus is a suitable potential platform for β-pinene production.

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Section: Introductionmentioning

confidence: 99%

Photosynthetic Conversion of CO2 Into Pinene Using Engineered Synechococcus sp. PCC 7002

Yang

Zhu

et al. 2021

Front. Bioeng. Biotechnol.

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“…As nutrient concentrations increased the dominance and abundance of phytoplankton, particularly cyanobacteria, also increases, often resulting in dense blooms, especially during summer (Reynolds, 1984). Cyanobacteria can provide several ecological services (Díez & Ininbergs, 2014). They fix nitrogen and release oxygen by photosynthesis, accumulate phosphorus and reflect the ecological state of the environment (i.e.…”

Section: Introductionmentioning

confidence: 99%

Geographical and temporal patterns of cyanobacterial assemblages in the Danube Delta lake complexes

et al. 2021

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Danube Delta shallow lakes experience cyanobacteria blooms that can negatively affect the aquatic ecosystem. Although there are several studies on Danube Delta cyanobacteria, little is known about their spatial-temporal patterns and the potential predictive role they can offer.We therefore analyzed the distribution of cyanobacteria in 19 lakes belonging to three lake complexes, and tested whether their seasonal dynamics are in line with the predictions of the PEG model. Furthermore, we investigated to which extent cyanobacteria diversity and abundance were related to lake hydrogeomorphological characteristics such as: surface, water level, connectivity, water retention, flood risk, transparency. Although lakes had different seasonal cyanobacterial assemblages, the biovolume and genus richness had a geographical pattern, decreasing from south-east (lakes forming the fluvial delta) towards north-west (lakes forming the maritime delta). Cyanobacteria biovolume reflected largely the PEG model peaking in summer (the fluvial delta) and autumn ( the maritime delta). Genus richness followed the same pattern. Cyanobacteria distribution was predicted by various abiotic (e.g. risk of flooding, connectivity) and biotic factors (e.g. submersed macrophytes, phytoplankton diversity, peat deposits). Our study contributes to the understanding of cyanobacteria diversity and distribution in shallow interconnected lakes by revealing the complexity of predictors for geographical and seasonal patterns.

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“…Cyanobacteria constitute an ancient, globally widespread and diverse bacterial phylum with a unique and great historical and current impact on our planet. Oxygenic photosynthesis and carbon fixation in ancient cyanobacteria not only resulted in the oxygenation of our atmosphere and through endosymbiosis gave rise to higher plants (Díez and Ininbergs, ) but is today still responsible for a major part of global primary production (Whitehead et al ., ). In addition, certain cyanobacteria have the capacity to fix atmospheric dinitrogen (N 2 ) and therefore significantly contribute to biogeochemical cycling of nitrogen in both aquatic and terrestrial ecosystems (Falkowski, ).…”

Section: Introductionmentioning

confidence: 99%

Meta‐omic analyses of Baltic Sea cyanobacteria: diversity, community structure and salt acclimation

Celepli

Sundh

Ekman

et al. 2017

Environmental Microbiology

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Summary Cyanobacteria are important phytoplankton in the Baltic Sea, an estuarine‐like environment with pronounced north to south gradients in salinity and nutrient concentrations. Here, we present a metagenomic and ‐transcriptomic survey, with subsequent analyses targeting the genetic identity, phylogenetic diversity, and spatial distribution of Baltic Sea cyanobacteria. The cyanobacterial community constituted close to 12% of the microbial population sampled during a pre‐bloom period (June–July 2009). The community was dominated by unicellular picocyanobacteria, specifically a few highly abundant taxa (Synechococcus and Cyanobium) with a long tail of low abundance representatives, and local peaks of bloom‐forming heterocystous taxa. Cyanobacteria in the Baltic Sea differed genetically from those in adjacent limnic and marine waters as well as from cultivated and sequenced picocyanobacterial strains. Diversity peaked at brackish salinities 3.5–16 psu, with low N:P ratios. A shift in community composition from brackish to marine strains was accompanied by a change in the repertoire and expression of genes involved in salt acclimation. Overall, the pre‐bloom cyanobacterial population was more genetically diverse, widespread and abundant than previously documented, with unicellular picocyanobacteria being the most abundant clade along the entire Baltic Sea salinity gradient.

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Ecological importance of cyanobacteria

Cited by 23 publications

References 227 publications

Photosynthetic Conversion of CO2 Into Pinene Using Engineered Synechococcus sp. PCC 7002

Photosynthetic Conversion of CO2 Into Pinene Using Engineered Synechococcus sp. PCC 7002

Geographical and temporal patterns of cyanobacterial assemblages in the Danube Delta lake complexes

Meta‐omic analyses of Baltic Sea cyanobacteria: diversity, community structure and salt acclimation

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