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Journal articles on the topic 'Marine cyanobacteria'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Nakayama, Takuro, Mami Nomura, Yoshihito Takano, et al. "Single-cell genomics unveiled a cryptic cyanobacterial lineage with a worldwide distribution hidden by a dinoflagellate host." Proceedings of the National Academy of Sciences 116, no. 32 (2019): 15973–78. http://dx.doi.org/10.1073/pnas.1902538116.

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Cyanobacteria are one of the most important contributors to oceanic primary production and survive in a wide range of marine habitats. Much effort has been made to understand their ecological features, diversity, and evolution, based mainly on data from free-living cyanobacterial species. In addition, symbiosis has emerged as an important lifestyle of oceanic microbes and increasing knowledge of cyanobacteria in symbiotic relationships with unicellular eukaryotes suggests their significance in understanding the global oceanic ecosystem. However, detailed characteristics of these cyanobacteria

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2

Hurley, Sarah J., Boswell A. Wing, Claire E. Jasper, Nicholas C. Hill, and Jeffrey C. Cameron. "Carbon isotope evidence for the global physiology of Proterozoic cyanobacteria." Science Advances 7, no. 2 (2021): eabc8998. http://dx.doi.org/10.1126/sciadv.abc8998.

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Ancestral cyanobacteria are assumed to be prominent primary producers after the Great Oxidation Event [≈2.4 to 2.0 billion years (Ga) ago], but carbon isotope fractionation by extant marine cyanobacteria (α-cyanobacteria) is inconsistent with isotopic records of carbon fixation by primary producers in the mid-Proterozoic eon (1.8 to 1.0 Ga ago). To resolve this disagreement, we quantified carbon isotope fractionation by a wild-type planktic β-cyanobacterium (Synechococcus sp. PCC 7002), an engineered Proterozoic analog lacking a CO2-concentrating mechanism, and cyanobacterial mats. At mid-Prot

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3

Engene, Niclas, Sarath P. Gunasekera, William H. Gerwick, and Valerie J. Paul. "Phylogenetic Inferences Reveal a Large Extent of Novel Biodiversity in Chemically Rich Tropical Marine Cyanobacteria." Applied and Environmental Microbiology 79, no. 6 (2013): 1882–88. http://dx.doi.org/10.1128/aem.03793-12.

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ABSTRACTBenthic marine cyanobacteria are known for their prolific biosynthetic capacities to produce structurally diverse secondary metabolites with biomedical application and their ability to form cyanobacterial harmful algal blooms. In an effort to provide taxonomic clarity to better guide future natural product drug discovery investigations and harmful algal bloom monitoring, this study investigated the taxonomy of tropical and subtropical natural product-producing marine cyanobacteria on the basis of their evolutionary relatedness. Our phylogenetic inferences of marine cyanobacterial strai

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4

Chagas, Fernanda O., Paulo I. Hargreaves, Victoria Gabriela S. Trindade, et al. "Chemical Diversity of Marine Filamentous Benthic Cyanobacteria." Phycology 4, no. 4 (2024): 589–604. http://dx.doi.org/10.3390/phycology4040032.

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Genomic and chemical analysis has revealed that numerous species of filamentous cyanobacteria harbor complex secondary metabolisms tailored to their particular ecological niche. The metabolomic analysis of strains and environmental samples from benthic cyanobacterial mats (BCMs) from coral reefs has the potential to expand the library of marine cyanobacteria-derived natural products. In this study, cyanobacterial strains were obtained from phytobenthos collected from coral reefs in Abrolhos, Brazil and Ishigaki, Japan. Phylogenetic analysis of isolates shows high similarity to previously descr

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5

Tan, Lik Tong, and Nurul Farhana Salleh. "Marine Cyanobacteria: A Rich Source of Structurally Unique Anti-Infectives for Drug Development." Molecules 29, no. 22 (2024): 5307. http://dx.doi.org/10.3390/molecules29225307.

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Marine cyanobacteria represent a promising yet underexplored source of novel natural products with potent biological activities. Historically, the focus has been on isolating cytotoxic compounds from marine cyanobacteria, but a substantial number of these photosynthetic microorganisms also produce diverse specialized molecules with significant anti-infective properties. Given the global pressing need for new anti-infective lead compounds, this review provides a concise yet comprehensive overview of the current knowledge on anti-infective secondary metabolites derived from marine cyanobacteria.

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6

El-Seedi, Hesham R., Mohamed F. El-Mallah, Nermeen Yosri, et al. "Review of Marine Cyanobacteria and the Aspects Related to Their Roles: Chemical, Biological Properties, Nitrogen Fixation and Climate Change." Marine Drugs 21, no. 8 (2023): 439. http://dx.doi.org/10.3390/md21080439.

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Marine cyanobacteria are an ancient group of photosynthetic microbes dating back to 3.5 million years ago. They are prolific producers of bioactive secondary metabolites. Over millions of years, natural selection has optimized their metabolites to possess activities impacting various biological targets. This paper discusses the historical and existential records of cyanobacteria, and their role in understanding the evolution of marine cyanobacteria through the ages. Recent advancements have focused on isolating and screening bioactive compounds and their respective medicinal properties, and we

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7

Ehrenreich, Ian M., John B. Waterbury, and Eric A. Webb. "Distribution and Diversity of Natural Product Genes in Marine and Freshwater Cyanobacterial Cultures and Genomes." Applied and Environmental Microbiology 71, no. 11 (2005): 7401–13. http://dx.doi.org/10.1128/aem.71.11.7401-7413.2005.

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ABSTRACT Natural products are a functionally diverse class of biochemically synthesized compounds, which include antibiotics, toxins, and siderophores. In this paper, we describe both the detection of natural product activities and the sequence identification of gene fragments from two molecular systems that have previously been implicated in natural product production, i.e., nonribosomal peptide synthetases (NRPSs) and modular polyketide synthases (PKSs), in diverse marine and freshwater cyanobacterial cultures. Using degenerate PCR and the sequencing of cloned products, we show that NRPSs an

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8

Tan, Lik Tong, and Ma Yadanar Phyo. "Marine Cyanobacteria: A Source of Lead Compounds and their Clinically-Relevant Molecular Targets." Molecules 25, no. 9 (2020): 2197. http://dx.doi.org/10.3390/molecules25092197.

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The prokaryotic filamentous marine cyanobacteria are photosynthetic microbes that are found in diverse marine habitats, ranging from epiphytic to endolithic communities. Their successful colonization in nature is largely attributed to genetic diversity as well as the production of ecologically important natural products. These cyanobacterial natural products are also a source of potential drug leads for the development of therapeutic agents used in the treatment of diseases, such as cancer, parasitic infections and inflammation. Major sources of these biomedically important natural compounds a

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9

Umeda, Kairi, Naoaki Kurisawa, Ghulam Jeelani, Tomoyoshi Nozaki, Kiyotake Suenaga, and Arihiro Iwasaki. "Isolation and structure determination of a new analog of polycavernosides from marine Okeania sp. cyanobacterium." Beilstein Journal of Organic Chemistry 20 (March 21, 2024): 645–52. http://dx.doi.org/10.3762/bjoc.20.57.

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Polycavernoside E (1), a new polycavernoside analog, was isolated from a marine Okeania sp. cyanobacterium. The relative configuration was elucidated primarily by analyzing the two dimensional nuclear magnetism resonance (2D NMR) data. The absolute configuration was clarified by comparing the electronic circular dichroism (ECD) data of 1 with those of known analogs. Polycavernoside E (1) exhibited moderate antitrypanosomal activity against Trypanosoma brucei rhodesiense. Furthermore, the isolation of polycavernoside E (1) from marine cyanobacteria provides additional evidence that marine cyano

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10

Leão, Tiago, Mingxun Wang, Nathan Moss, et al. "A Multi-Omics Characterization of the Natural Product Potential of Tropical Filamentous Marine Cyanobacteria." Marine Drugs 19, no. 1 (2021): 20. http://dx.doi.org/10.3390/md19010020.

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Microbial natural products are important for the understanding of microbial interactions, chemical defense and communication, and have also served as an inspirational source for numerous pharmaceutical drugs. Tropical marine cyanobacteria have been highlighted as a great source of new natural products, however, few reports have appeared wherein a multi-omics approach has been used to study their natural products potential (i.e., reports are often focused on an individual natural product and its biosynthesis). This study focuses on describing the natural product genetic potential as well as the

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11

Biessy, Laura, Jonathan Puddick, Susanna A. Wood, Andrew I. Selwood, Megan Carbines, and Kirsty F. Smith. "First Report of Accumulation of Lyngbyatoxin-A in Edible Shellfish in Aotearoa New Zealand from Marine Benthic Cyanobacteria." Toxins 16, no. 12 (2024): 522. https://doi.org/10.3390/toxins16120522.

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This study reports the first documented accumulation of lyngbyatoxin-a (LTA), a cyanotoxin produced by marine benthic cyanobacteria, in edible shellfish in Aotearoa New Zealand. The study investigates two bloom events in 2022 and 2023 on Waiheke Island, where hundreds of tonnes of marine benthic cyanobacterial mats (mBCMs) washed ashore each summer. Genetic analysis identified the cyanobacterium responsible for the blooms as Okeania sp., a genus typically found in tropical marine ecosystems. Analysis by liquid chromatography–tandem mass spectrometry indicated that the cyanobacteria produced a

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12

Toledo, Gerardo, Yoav Bashan, and Al Soeldner. "In vitro colonization and increase in nitrogen fixation of seedling roots of black mangrove inoculated by a filamentous cyanobacteria." Canadian Journal of Microbiology 41, no. 11 (1995): 1012–20. http://dx.doi.org/10.1139/m95-140.

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An isolate of the filamentous cyanobacterium Microcoleus sp. was obtained from black mangrove aerial root (pneumatophore) and inoculated onto young mangrove seedlings to evaluate N2-fixation and root-colonization capacities of the bacterium under in vitro conditions in closed-system experiments. N2 fixation (acetylene reduction) gradually increased with time and reached its peak 5 days after inoculation. Later, it decreased sharply. The level of N2 fixation in the presence of the plant was significantly higher than the amount of nitrogen fixed by a similar quantity of cyanobacteria on a N-free

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13

S. Pooja, S. Pooja, and Niveshika Niveshika. "Insight into the Potential Cyanobacterial Metabolites and their Screening Strategies." Biosciences Biotechnology Research Asia 19, no. 1 (2022): 255–79. http://dx.doi.org/10.13005/bbra/2983.

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Cyanobacteria are the first oxygenic photosynthesis performing prokaryotes. They are considered to have fast growth, amenability to genetic modifications towards photo-autotrophy. Have the ability to grow under heterotrophic conditions with minimum available sunlight to obtain energy by utilizing organic carbon as its substrate. Cyanobacteria are diversely spread in marine, freshwater, terrestrial habitats which differ from each other concerning their structural and functional metabolism. It produces bioactive compounds which are toxic to animals as well as humans which are produced in freshwa

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14

Puyana, Mónica, Julián Alberto Prato, Christian Felipe Nieto, et al. "Experimental Approaches for the Evaluation of Allelopathic Interactions Between Hermatypic Corals and Marine Benthic Cyanobacteria in the Colombian Caribbean." Acta Biológica Colombiana 24, no. 2 (2019): 243–54. http://dx.doi.org/10.15446/abc.v24n2.72706.

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Blooms of marine benthic cyanobacteria are recurrent in several locations at the Colombian Caribbean. In these events, cyanobacteria grow over the substrate and benthic organisms although their effect has not been fully assessed. This study evaluated interactions between cyanobacteria and hermatypic corals, in order to identify any deleterious effects that could be related to allelopathic mechanisms. Organic extracts from cyanobacteria collected in San Andres, Old Providence and Rosario islands were tested against embryos of the reef-building coral Orbicella annularis. The indirect effect of c

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15

Thuduhena, Anjana Chamilka. "The HARMFUL CYANOBACTERIAL BLOOMS AND DEVELOPED CYANOPHAGES AS A BIOLOGICAL SOLUTION." Bacterial Empire 2, no. 1 (2019): 6. http://dx.doi.org/10.36547/be.2019.2.1.6-9.

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Abstract  Cyanobacterial Harmful Algal blooms (CHABs) cause devastating impacts to fisheries, tourism, public health and ecosystem around the world, and have increased in frequency. Cyanobacterial blooms occur in fresh water and marine environments, producing a variety of toxins, and poisoning risks to humans and animals. Chemicals can be used to kill cyanobacteria. Unfortunately, many of these chemicals are toxic to other forms of life, including fish and organisms they eat. The use of chemicals in natural lakes could create more problems than they solve, is not permitted. Cyanoph

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16

Ram, Arun T., and P. T. Paul. "New Record of Benthic Cyanobacterium Anagnostidinema pseudacutissimum (Coleofasciculales, Wilmottiaceae) from the Southwest Coast of India." International Journal on Algae 27, no. 2 (2025): 111–16. https://doi.org/10.1615/interjalgae.v27.i2.20.

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The benthic cyanobacterium <i>Anagnostidinema pseudacutissimum</i> (Geitler) Strunecky, Bohunicka, Johansen et Kom&#225;rek (<i>Coleofasciculales</i>, Wilmottiaceae) is reported for the first time from the southwest coast of India. The current findings extend the geographical distribution of this species to the marine environment of the southwestern Indian coast. The new records highlight the diversity and underexplored nature of benthic cyanobacteria in the marine ecosystems of the Indian subcontinent. The samples were collected from intertidal zones of the southwe

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17

Rague, Andrea, Stacy-Ann Parker, and Kevin Tidgewell. "Evaluating Marine Cyanobacteria as a Source for CNS Receptor Ligands." Molecules 23, no. 10 (2018): 2665. http://dx.doi.org/10.3390/molecules23102665.

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Natural products have a long history as a source of psychoactive agents and pharmacological tools for understanding the brain and its circuitry. In the last two decades, marine cyanobacteria have become a standard source of natural product ligands with cytotoxic properties. The study of cyanobacterial metabolites as CNS modulatory agents has remained largely untapped, despite the need for new molecules to treat and understand CNS disorders. We have generated a library of 301 fractions from 37 field collected cyanobacterial samples and screened these fractions against a panel of CNS receptors u

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18

Bižić, M., T. Klintzsch, D. Ionescu, et al. "Aquatic and terrestrial cyanobacteria produce methane." Science Advances 6, no. 3 (2020): eaax5343. http://dx.doi.org/10.1126/sciadv.aax5343.

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Evidence is accumulating to challenge the paradigm that biogenic methanogenesis, considered a strictly anaerobic process, is exclusive to archaea. We demonstrate that cyanobacteria living in marine, freshwater, and terrestrial environments produce methane at substantial rates under light, dark, oxic, and anoxic conditions, linking methane production with light-driven primary productivity in a globally relevant and ancient group of photoautotrophs. Methane production, attributed to cyanobacteria using stable isotope labeling techniques, was enhanced during oxygenic photosynthesis. We suggest th

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19

Rabenstein, Andreas, Jörg Rethmeier, and Ulrich Fischer. "Sulphite as Intermediate Sulphur Compound in Anaerobic Sulphide Oxidation to Thiosulphate by Marine Cyanobacteria." Zeitschrift für Naturforschung C 50, no. 11-12 (1995): 769–74. http://dx.doi.org/10.1515/znc-1995-11-1206.

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Abstract Anaerobic sulphide oxidation in the light was studied with seven cyanobacterial strains isolated from the southern Baltic Sea. All strains oxidized sulphide (1.2-3.5 mM) stoichio-metrically to thiosulphate. No elemental sulphur could be detected as end product of anoxy-genic photosynthesis. Sulphite as intermediate sulphur compound was released into the growth medium during anaerobic sulphide oxidation by these cyanobacteria. The formation of sulphite from sulphide was inhibited by the photosynthesis inhibitor DCMU. The cyanobacterium Oscillatoria sp. strain BO 32 produced another so

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20

Konstantinou, Despoina, Rafael V. Popin, David P. Fewer, Kaarina Sivonen, and Spyros Gkelis. "Genome Reduction and Secondary Metabolism of the Marine Sponge-Associated Cyanobacterium Leptothoe." Marine Drugs 19, no. 6 (2021): 298. http://dx.doi.org/10.3390/md19060298.

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Sponges form symbiotic relationships with diverse and abundant microbial communities. Cyanobacteria are among the most important members of the microbial communities that are associated with sponges. Here, we performed a genus-wide comparative genomic analysis of the newly described marine benthic cyanobacterial genus Leptothoe (Synechococcales). We obtained draft genomes from Le. kymatousa TAU-MAC 1615 and Le. spongobia TAU-MAC 1115, isolated from marine sponges. We identified five additional Leptothoe genomes, host-associated or free-living, using a phylogenomic approach, and the comparison

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Siregar, Tuti H. "Arsenic uptake and metabolism by a marine cyanobacteria PCC7002." E3S Web of Conferences 442 (2023): 01028. http://dx.doi.org/10.1051/e3sconf/202344201028.

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Cyanobacteria Synechococcus PCC7002 is a typical marine bacterium that can tolerate salinity at around 20 ppt. In this study, cyanobacterium PCC7002 cells were incubated in a controlled environmental chamber for one week. Three different arsenic V (AsV) concentrations were added to the culture to observe the cyanobacterium’s capability to arsenic uptake. The arsenic uptake was then compared to the control media (without AsV addition). The higher the arsenic concentration added to the media, the more Arsenic occurs in the cells. Cyanobacteria cells could take up arsenic from their media at the

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22

Uzair, Bushra, Sobia Tabassum, Madiha Rasheed, and Saima Firdous Rehman. "Exploring Marine Cyanobacteria for Lead Compounds of Pharmaceutical Importance." Scientific World Journal 2012 (2012): 1–10. http://dx.doi.org/10.1100/2012/179782.

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The Ocean, which is called the “mother of origin of life,” is also the source of structurally unique natural products that are mainly accumulated in living organisms. Cyanobacteria are photosynthetic prokaryotes used as food by humans. They are excellent source of vitamins and proteins vital for life. Several of these compounds show pharmacological activities and are helpful for the invention and discovery of bioactive compounds, primarily for deadly diseases like cancer, acquired immunodeficiency syndrome (AIDS), arthritis, and so forth, while other compounds have been developed as analgesics

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Mutalipassi, Mirko, Gennaro Riccio, Valerio Mazzella, et al. "Symbioses of Cyanobacteria in Marine Environments: Ecological Insights and Biotechnological Perspectives." Marine Drugs 19, no. 4 (2021): 227. http://dx.doi.org/10.3390/md19040227.

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Cyanobacteria are a diversified phylum of nitrogen-fixing, photo-oxygenic bacteria able to colonize a wide array of environments. In addition to their fundamental role as diazotrophs, they produce a plethora of bioactive molecules, often as secondary metabolites, exhibiting various biological and ecological functions to be further investigated. Among all the identified species, cyanobacteria are capable to embrace symbiotic relationships in marine environments with organisms such as protozoans, macroalgae, seagrasses, and sponges, up to ascidians and other invertebrates. These symbioses have b

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Oliveira, Flavio, Leticia Diez-Quijada, Maria V. Turkina, et al. "Physiological and Metabolic Responses of Marine Mussels Exposed to Toxic Cyanobacteria Microcystis aeruginosa and Chrysosporum ovalisporum." Toxins 12, no. 3 (2020): 196. http://dx.doi.org/10.3390/toxins12030196.

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Toxic cyanobacterial blooms are a major contaminant in inland aquatic ecosystems. Furthermore, toxic blooms are carried downstream by rivers and waterways to estuarine and coastal ecosystems. Concerning marine and estuarine animal species, very little is known about how these species are affected by the exposure to freshwater cyanobacteria and cyanotoxins. So far, most of the knowledge has been gathered from freshwater bivalve molluscs. This work aimed to infer the sensitivity of the marine mussel Mytilus galloprovincialis to single as well as mixed toxic cyanobacterial cultures and the underl

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Webb, E. A., J. W. Moffett, and J. B. Waterbury. "Iron Stress in Open-Ocean Cyanobacteria (Synechococcus, Trichodesmium, andCrocosphaera spp.): Identification of the IdiA Protein." Applied and Environmental Microbiology 67, no. 12 (2001): 5444–52. http://dx.doi.org/10.1128/aem.67.12.5444-5452.2001.

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ABSTRACT Cyanobacteria are prominent constituents of the marine biosphere that account for a significant percentage of oceanic primary productivity. In an effort to resolve how open-ocean cyanobacteria persist in regions where the Fe concentration is thought to be limiting their productivity, we performed a number of Fe stress experiments on axenic cultures of marine Synechococcus spp., Crocosphaera sp., andTrichodesmium sp. Through this work, we determined that all of these marine cyanobacteria mount adaptive responses to Fe stress, which resulted in the induction and/or repression of several

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G, Jilsha, Hemnath Elango, Anuja K U, Vinod K R, and Deepa M K. "Marine Cyanobacteria-Assisted Metallic Nanoparticles: A Review on Anticancer Activity and Mechanism of Action." UTTAR PRADESH JOURNAL OF ZOOLOGY 45, no. 21 (2024): 138–47. http://dx.doi.org/10.56557/upjoz/2024/v45i214623.

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Marine cyanobacteria, known as blue-green algae, are ancient microorganisms with oxygenic photosynthetic capability. They have diverse biochemical capabilities, including production of bioactive secondary metabolites. We studied the anti-cancer properties of cyanobacterial nanoparticles through various literatures. We focused on mechanistic studies of the anticancer properties of metal and metal oxide nanoparticles. Our research gathered information from patent databases, conference abstracts, publications, and news releases, as well as PubMed searches for peer-reviewed articles and Google sea

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Zhou, Qin, Dengfeng Li, Wei Lin, et al. "Genomic Analysis of a New Freshwater Cyanophage Lbo240-yong1 Suggests a New Taxonomic Family of Bacteriophages." Viruses 15, no. 4 (2023): 831. http://dx.doi.org/10.3390/v15040831.

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A worldwide ecological issue, cyanobacterial blooms in marine and freshwater have caused enormous losses in both the economy and the environment. Virulent cyanophages—specifically, infecting and lysing cyanobacteria—are key ecological factors involved in limiting the overall extent of the population development of cyanobacteria. Over the past three decades, reports have mainly focused on marine Prochlorococcus and Synechococcus cyanophages, while information on freshwater cyanophages remained largely unknown. In this study, a novel freshwater cyanophage, named Lbo240-yong1, was isolated via th

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Chi, Xiaoyuan, Qingli Yang, Fangqing Zhao, et al. "Comparative Analysis of Fatty Acid Desaturases in Cyanobacterial Genomes." Comparative and Functional Genomics 2008 (2008): 1–25. http://dx.doi.org/10.1155/2008/284508.

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Fatty acid desaturases are enzymes that introduce double bonds into the hydrocarbon chains of fatty acids. The fatty acid desaturases from 37 cyanobacterial genomes were identified and classified based upon their conserved histidine-rich motifs and phylogenetic analysis, which help to determine the amounts and distributions of desaturases in cyanobacterial species. The filamentous orN2-fixing cyanobacteria usually possess more types of fatty acid desaturases than that of unicellular species. The pathway of acyl-lipid desaturation for unicellular marine cyanobacteriaSynechococcusandProchlorococ

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Cornejo-Castillo, Francisco M., and Jonathan P. Zehr. "Hopanoid lipids may facilitate aerobic nitrogen fixation in the ocean." Proceedings of the National Academy of Sciences 116, no. 37 (2019): 18269–71. http://dx.doi.org/10.1073/pnas.1908165116.

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Cyanobacterial diazotrophs are considered to be the most important source of fixed N2in the open ocean. Biological N2fixation is catalyzed by the extremely O2-sensitive nitrogenase enzyme. In cyanobacteria without specialized N2-fixing cells (heterocysts), mechanisms such as decoupling photosynthesis from N2fixation in space or time are involved in protecting nitrogenase from the intracellular O2evolved by photosynthesis. However, it is not known how cyanobacterial cells limit O2diffusion across their membranes to protect nitrogenase in ambient O2-saturated surface ocean waters. Here, we explo

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Konstantinou, Despoina, Eleni Mavrogonatou, Sevasti-Kiriaki Zervou, Panagiotis Giannogonas, and Spyros Gkelis. "Bioprospecting Sponge-Associated Marine Cyanobacteria to Produce Bioactive Compounds." Toxins 12, no. 2 (2020): 73. http://dx.doi.org/10.3390/toxins12020073.

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Marine cyanobacteria are considered a prolific source of bioactive natural products with a range of biotechnological and pharmacological applications. However, data on the production of natural compounds from sponge-associated cyanobacteria are scarce. This study aimed to assess the potential of sponge-associated cyanobacteria strains representing different taxonomic groups for the production of bioactive compounds and the biological activity of their extracts. Phylogenetic analysis of sponge-associated cyanobacteria and screening for the presence of genes encoding non-ribosomal peptide synthe

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Omata, Tatsuo, Yukari Takahashi, Osamu Yamaguchi, and Takashi Nishimura. "Structure, function and regulation of the cyanobacterial high-affinity bicarbonate transporter, BCT1." Functional Plant Biology 29, no. 3 (2002): 151. http://dx.doi.org/10.1071/pp01215.

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The cmpABCD operon of the cyanobacterium Synechococcus sp. strain PCC7942, which is transcribed specifically under CO2-limited growth conditions, encodes an ATP-binding cassette (ABC) transporter involved in HCO3–uptake (designated BCT1). The product of the cmpA gene is a 42-kDa protein anchored to the plasma membrane, which binds HCO3– with high affinity (Kd= 5 µM) and acts as the substrate-binding protein of the transporter. The apparent Km(HCO3–) of BCT1 is 15 µM. BCT1 has the highest affinity for HCO3– among the HCO3– transporters of the Synechococcus strain and is essential for competitiv

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So, Anthony K.-C., and George S. Espie. "Cyanobacterial carbonic anhydrases." Canadian Journal of Botany 83, no. 7 (2005): 721–34. http://dx.doi.org/10.1139/b05-057.

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Carbonic anhydrases (CAs) are ubiquitous zinc metalloenzymes that catalyze the reversible dehydration of HCO3. These enzymes are encoded by at least five distinct, evolutionarily unrelated gene families, four of which have been found among the cyanobacteria examined to date. However, the distribution and expression of these cyanobacterial α-, β-, γ-, and ∈-CAs and their homologues among species have not yet been investigated in great detail. In this study, the number, distribution, and catalytic function of known and putative CAs and CA-like proteins from a variety of freshwater and marine cy

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Zborowsky, Sophia, and Debbie Lindell. "Resistance in marine cyanobacteria differs against specialist and generalist cyanophages." Proceedings of the National Academy of Sciences 116, no. 34 (2019): 16899–908. http://dx.doi.org/10.1073/pnas.1906897116.

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Long-term coexistence between unicellular cyanobacteria and their lytic viruses (cyanophages) in the oceans is thought to be due to the presence of sensitive cells in which cyanophages reproduce, ultimately killing the cell, while other cyanobacteria survive due to resistance to infection. Here, we investigated resistance in marine cyanobacteria from the genera Synechococcus and Prochlorococcus and compared modes of resistance against specialist and generalist cyanophages belonging to the T7-like and T4-like cyanophage families. Resistance was extracellular in most interactions against special

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Charpy, L., B. E. Casareto, M. J. Langlade, and Y. Suzuki. "Cyanobacteria in Coral Reef Ecosystems: A Review." Journal of Marine Biology 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/259571.

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Cyanobacteria have dominated marine environments and have been reef builders on Earth for more than three million years (myr). Cyanobacteria still play an essential role in modern coral reef ecosystems by forming a major component of epiphytic, epilithic, and endolithic communities as well as of microbial mats. Cyanobacteria are grazed by reef organisms and also provide nitrogen to the coral reef ecosystems through nitrogen fixation. Recently, new unicellular cyanobacteria that express nitrogenase were found in the open ocean and in coral reef lagoons. Furthermore, cyanobacteria are important

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Wang, Yunpeng, Scarlet Ferrinho, Helen Connaris, and Rebecca J. M. Goss. "The Impact of Viral Infection on the Chemistries of the Earth’s Most Abundant Photosynthesizes: Metabolically Talented Aquatic Cyanobacteria." Biomolecules 13, no. 8 (2023): 1218. http://dx.doi.org/10.3390/biom13081218.

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Cyanobacteria are the most abundant photosynthesizers on earth, and as such, they play a central role in marine metabolite generation, ocean nutrient cycling, and the control of planetary oxygen generation. Cyanobacteriophage infection exerts control on all of these critical processes of the planet, with the phage-ported homologs of genes linked to photosynthesis, catabolism, and secondary metabolism (marine metabolite generation). Here, we analyze the 153 fully sequenced cyanophages from the National Center for Biotechnology Information (NCBI) database and the 45 auxiliary metabolic genes (AM

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Al-Tebrineh, Jamal, Troco Kaan Mihali, Francesco Pomati, and Brett A. Neilan. "Detection of Saxitoxin-Producing Cyanobacteria and Anabaena circinalis in Environmental Water Blooms by Quantitative PCR." Applied and Environmental Microbiology 76, no. 23 (2010): 7836–42. http://dx.doi.org/10.1128/aem.00174-10.

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ABSTRACT Saxitoxins (STXs) are carbamate alkaloid neurotoxins produced by marine “red tide” dinoflagellates and several species of freshwater filamentous cyanobacteria, including Anabaena circinalis, Aphanizomenon spp., Lyngbya wollei, and Cylindrospermopsis raciborskii. A specific quantitative PCR (qPCR) method based on SYBR green chemistry was developed to quantify saxitoxin-producing Anabaena circinalis cyanobacteria, which are major bloom-forming freshwater cyanobacteria. The aim of this study was to infer the potential toxigenicity of samples by determining the copy number of a unique and

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Pagliara, Patrizia, Amilcare Barca, Tiziano Verri, and Carmela Caroppo. "The Marine Sponge Petrosia ficiformis Harbors Different Cyanobacteria Strains with Potential Biotechnological Application." Journal of Marine Science and Engineering 8, no. 9 (2020): 638. http://dx.doi.org/10.3390/jmse8090638.

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Marine cyanobacteria are a source of bioactive natural compounds, with a wide range of biotechnological applications. However, information on sponge-associated cyanobacteria are relatively scarce to date. In this paper, we carried out the morphological and molecular characterization of eight cyanobacterial strains, previously isolated from the Mediterranean sponge Petrosia ficiformis, and evaluated their biological activities on epithelial- and neuron-like cultured cells of human and murine origin. The new analysis allowed maintaining the assignment of three strains (Cyanobium sp., Leptolyngby

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Ayala, Farja I., Laura M. Becerra, Jairo Quintana, et al. "Environmental and cultured cyanobacteria as sources of Aedes aegypti larvicides." Universitas Scientiarum 24, no. 3 (2019): 465–96. http://dx.doi.org/10.11144/javeriana.sc24-3.eacc.

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In tropical countries, the control of the mosquito Aedes aegypti is a public health priority due to its role as a vector of important viral diseases. Marine cyanobacteria are recognized as abundant sources of bioactive compounds, and they constitute a potential source of insecticides useful for controlling mosquito populations and preventing epidemic outbreaks. We collected 30 benthic cyanobacterial mats in Providencia and Rosario islands (in the Colombian Caribbean) belonging to the genera Phormidium, Symploca, Oscillatoria, Lyngbya, Pseudoanabaena, Leptolyngbya, Moorea, and Dapis. Fractions

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Pagliara, Patrizia, Giuseppe Egidio De Benedetto, Matteo Francavilla, Amilcare Barca, and Carmela Caroppo. "Bioactive Potential of Two Marine Picocyanobacteria Belonging to Cyanobium and Synechococcus Genera." Microorganisms 9, no. 10 (2021): 2048. http://dx.doi.org/10.3390/microorganisms9102048.

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Coccoid cyanobacteria produce a great variety of secondary metabolites, which may have useful properties, such as antibacterial, antiviral, anticoagulant or anticancer activities. These cyanobacterial metabolites have high ecological significance, and they could be considered responsible for the widespread occurrence of these microorganisms. Considering the great benefit derived from the identification of competent cyanobacteria for the extraction of bioactive compounds, two strains of picocyanobacteria (coccoid cyanobacteria < 3 µm) (Cyanobium sp. ITAC108 and Synechococcus sp. ITAC107) iso

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Codd, G. A. "Cyanobacterial toxins: occurrence, properties and biological significance." Water Science and Technology 32, no. 4 (1995): 149–56. http://dx.doi.org/10.2166/wst.1995.0177.

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All of the most commonly encountered genera of cyanobacteria which form blooms and scums in fresh-brackish- and marine waters include members capable of producing potent toxins. Poisonings of vertebrate and invertebrate animals following the ingestion of cyanobacterial bloom/scum material have been widely reported for many years and recognition of the adverse effects of cyanobacterial blooms and their toxins is increasing. This review considers the occurrence of toxic cyanobacterial populations and properties of the toxins themselves, of which at least 60 are now recognised. When rightfully re

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Salleh, Nurul Farhana, Jiale Wang, Binu Kundukad, et al. "Cyclopropane-Containing Specialized Metabolites from the Marine Cyanobacterium cf. Lyngbya sp." Molecules 28, no. 9 (2023): 3965. http://dx.doi.org/10.3390/molecules28093965.

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Marine cyanobacteria are known to produce structurally diverse bioactive specialized metabolites during bloom occurrence. These ecologically active allelochemicals confer chemical defense for the microalgae from competing microbes and herbivores. From a collection of a marine cyanobacterium, cf. Lyngbya sp., a small quantity of a new cyclopropane-containing molecule, benderadiene (2), and lyngbyoic acid (1) were purified and characterized using spectroscopic methods. Using live reporter quorum-sensing (QS) inhibitory assays, based on P. aeruginosa PAO1 lasB-gfp and rhlA-gfp strains, both compo

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Kehr, Jan-Christoph, Douglas Gatte Picchi, and Elke Dittmann. "Natural product biosyntheses in cyanobacteria: A treasure trove of unique enzymes." Beilstein Journal of Organic Chemistry 7 (December 5, 2011): 1622–35. http://dx.doi.org/10.3762/bjoc.7.191.

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Cyanobacteria are prolific producers of natural products. Investigations into the biochemistry responsible for the formation of these compounds have revealed fascinating mechanisms that are not, or only rarely, found in other microorganisms. In this article, we survey the biosynthetic pathways of cyanobacteria isolated from freshwater, marine and terrestrial habitats. We especially emphasize modular nonribosomal peptide synthetase (NRPS) and polyketide synthase (PKS) pathways and highlight the unique enzyme mechanisms that were elucidated or can be anticipated for the individual products. We f

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Ohkubo, Satoshi, Hideaki Miyashita, Akio Murakami, Haruko Takeyama, Tohru Tsuchiya, and Mamoru Mimuro. "Molecular Detection of Epiphytic Acaryochloris spp. on Marine Macroalgae." Applied and Environmental Microbiology 72, no. 12 (2006): 7912–15. http://dx.doi.org/10.1128/aem.01148-06.

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ABSTRACT A molecular method for detecting the epiphyte community on marine macroalgae was developed by using PCR-denaturing gradient gel electrophoresis. Selective amplification of 16S rRNA gene fragments from either cyanobacteria or algal plastids improved the detection of minor epiphytes. Two phylotypes of Acaryochloris, a chlorophyll d-containing cyanobacterium, were found not only on red macroalgae but also on green and brown macroalgae.

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Titlyanov, Eduard A., Tamara V. Titlyanova, Xiubao Li, Gayle I. Hansen, and Hui Huang. "Seasonal changes in the intertidal algal communities of Sanya Bay (Hainan Island, China)." Journal of the Marine Biological Association of the United Kingdom 94, no. 5 (2014): 879–93. http://dx.doi.org/10.1017/s0025315414000460.

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A floristic study of marine macrophytic algae and Cyanobacteria in the splash and intertidal zones at Luhuitou reef, Sanya Bay, Hainan Island, China, was conducted during the rainy and dry seasons of 2008−2012 utilizing 148 of the most common species. Macrophytic algal diversity increased from the splash zone to the low intertidal zone, while cyanobacterial diversity decreased. In the upper and middle intertidal zones, the dominant species (primarily highly productive ephemerals) changed frequently throughout each year. In the low intertidal zone, the dominant species (mainly annual fleshy, fo

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BHUVANESHWARI, T., M. SHYLAJANACIYAR, P. ARUL PRAKASAM, et al. "Polyphasic analysis for elucidating the taxonomic position of selected unicellular marine cyanobacteria from Indian and Hong Kong coast." Phytotaxa 307, no. 4 (2017): 263. http://dx.doi.org/10.11646/phytotaxa.307.4.4.

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Cyanobacteria, the primordial oxygenic photosynthetic prokaryotes encompass a wide spectrum of morphologies and ecologies. The diversity of twelve marine unicellular cyanobacteria isolated from different marine habitats was analyzed morphologically. The evolutionary relationship among the investigated strains was examined by phylogenetic analysis of nearly complete 16S rRNA gene and 16-23S internal transcribed spacer region. Phylogenetic analysis of both 16S rRNA genes and internal spacer regions exhibited coherent clustering patterns. The genetic relatedness of the investigated strains was la

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Falcón, Luisa I., Edward J. Carpenter, Frank Cipriano, Birgitta Bergman, and Douglas G. Capone. "N2 Fixation by Unicellular Bacterioplankton from the Atlantic and Pacific Oceans: Phylogeny and In Situ Rates." Applied and Environmental Microbiology 70, no. 2 (2004): 765–70. http://dx.doi.org/10.1128/aem.70.2.765-770.2004.

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ABSTRACT N2-fixing proteobacteria (α and γ) and unicellular cyanobacteria are common in both the tropical North Atlantic and Pacific oceans. In near-surface waters proteobacterial nifH transcripts were present during both night and day while unicellular cyanobacterial nifH transcripts were present during the nighttime only, suggesting separation of N2 fixation and photosynthesis by unicellular cyanobacteria. Phylogenetic relationships among unicellular cyanobacteria from both oceans were determined after sequencing of a conserved region of 16S ribosomal DNA (rDNA) of cyanobacteria, and results

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El Amrani Zerrifi, Soukaina, Fatima El Khalloufi, Richard Mugani, et al. "Seaweed Essential Oils as a New Source of Bioactive Compounds for Cyanobacteria Growth Control: Innovative Ecological Biocontrol Approach." Toxins 12, no. 8 (2020): 527. http://dx.doi.org/10.3390/toxins12080527.

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The application of natural compounds extracted from seaweeds is a promising eco-friendly alternative solution for harmful algae control in aquatic ecosystems. In the present study, the anti-cyanobacterial activity of three Moroccan marine macroalgae essential oils (EOs) was tested and evaluated on unicellular Microcystis aeruginosa cyanobacterium. Additionally, the possible anti-cyanobacterial response mechanisms were investigated by analyzing the antioxidant enzyme activities of M. aeruginosa cells. The results of EOs GC–MS analyses revealed a complex chemical composition, allowing the identi

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Díez, Beatriz, Karolina Bauer, and Birgitta Bergman. "Epilithic Cyanobacterial Communities of a Marine Tropical Beach Rock (Heron Island, Great Barrier Reef): Diversity and Diazotrophy." Applied and Environmental Microbiology 73, no. 11 (2007): 3656–68. http://dx.doi.org/10.1128/aem.02067-06.

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ABSTRACT The diversity and nitrogenase activity of epilithic marine microbes in a Holocene beach rock (Heron Island, Great Barrier Reef, Australia) with a proposed biological calcification “microbialite” origin were examined. Partial 16S rRNA gene sequences from the dominant mat (a coherent and layered pink-pigmented community spread over the beach rock) and biofilms (nonstratified, differently pigmented microbial communities of small shallow depressions) were retrieved using denaturing gradient gel electrophoresis (DGGE), and a clone library was retrieved from the dominant mat. The 16S rRNA g

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Bale, Nicole J., Tracy A. Villareal, Ellen C. Hopmans, et al. "C<sub>5</sub> glycolipids of heterocystous cyanobacteria track symbiont abundance in the diatom <i>Hemiaulus hauckii</i> across the tropical North Atlantic." Biogeosciences 15, no. 4 (2018): 1229–41. http://dx.doi.org/10.5194/bg-15-1229-2018.

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Abstract. Diatom–diazotroph associations (DDAs) include marine heterocystous cyanobacteria found as exosymbionts and endosymbionts in multiple diatom species. Heterocysts are the site of N2 fixation and have thickened cell walls containing unique heterocyst glycolipids which maintain a low oxygen environment within the heterocyst. The endosymbiotic cyanobacterium Richelia intracellularis found in species of the diatom genus Hemiaulus and Rhizosolenia makes heterocyst glycolipids (HGs) which are composed of C30 and C32 diols and triols with pentose (C5) moieties that are distinct from limnetic

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Zehr, Jonathan P. "Nitrogen fixation by marine cyanobacteria." Trends in Microbiology 19, no. 4 (2011): 162–73. http://dx.doi.org/10.1016/j.tim.2010.12.004.

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