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Li H, Li R, Kang J, Hii KS, Mohamed HF, Xu X, Luo Z. Okeanomitos corallinicola gen. and sp. nov. (Nostocales, Cyanobacteria), a new toxic marine heterocyte-forming Cyanobacterium from a coral reef. JOURNAL OF PHYCOLOGY 2024; 60:908-927. [PMID: 38943258 DOI: 10.1111/jpy.13473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 05/05/2024] [Accepted: 05/11/2024] [Indexed: 07/01/2024]
Abstract
Cyanobacterial mats supplanting coral and spreading coral diseases in tropical reefs, intensified by environmental shifts caused by human-induced pressures, nutrient enrichment, and global climate change, pose grave risks to the survival of coral ecosystems. In this study, we characterized Okeanomitos corallinicola gen. and sp. nov., a newly discovered toxic marine heterocyte-forming cyanobacterium isolated from a coral reef ecosystem of the South China Sea. Phylogenetic analysis, based on the 16S rRNA gene and the secondary structure of the 16S-23S rRNA intergenic region, placed this species in a clade distinct from closely related genera, that is, Sphaerospermopsis stricto sensu, Raphidiopsis, and Amphiheterocytum. The O. corallinicola is a marine benthic species lacking gas vesicles, distinguishing it from other members of the Aphanizomenonaceae family. The genome of O. corallinicola is large and exhibits diverse functional capabilities, potentially contributing to the resilience and adaptability of coral reef ecosystems. In vitro assays revealed that O. corallinicola demonstrates notable cytotoxic activity against various cancer cell lines, suggesting its potential as a source of novel anticancer compounds. Furthermore, the identification of residual saxitoxin biosynthesis function in the genome of O. corallinicola, a marine cyanobacteria, supports the theory that saxitoxin genes in cyanobacteria and dinoflagellates may have been horizontally transferred between them or may have originated from a shared ancestor. Overall, the identification and characterization of O. corallinicola provides valuable contributions to cyanobacterial taxonomy, offering novel perspectives on complex interactions within coral reef ecosystems.
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Affiliation(s)
- Haiyan Li
- Key Laboratory of Marine Ecological Conservation and Restoration, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
- Institute of Marine Drugs/Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning, China
| | - Renhui Li
- College of Life and Environmental Sciences, Wenzhou University, Wenzhou, China
| | - Jianhua Kang
- Key Laboratory of Marine Ecological Conservation and Restoration, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
| | - Kieng Soon Hii
- Bachok Marine Research Station, Institute of Ocean and Earth Sciences, University of Malaya, Bachok, Kelantan, Malaysia
| | - Hala F Mohamed
- Botany & Microbiology Department, Faculty of Science, Al-Azhar University (Girls Branch), Cairo, Egypt
| | - Xinya Xu
- Institute of Marine Drugs/Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning, China
| | - Zhaohe Luo
- Key Laboratory of Marine Ecological Conservation and Restoration, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
- Observation and Research Station of Coastal Wetland Ecosystem in Beibu Gulf, Ministry of Natural Resources, Beihai, China
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2
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Luz R, Cordeiro R, Fonseca A, Raposeiro PM, Gonçalves V. Distribution and diversity of cyanobacteria in the Azores Archipelago: An annotated checklist. Biodivers Data J 2022; 10:e87638. [PMID: 36761623 PMCID: PMC9848483 DOI: 10.3897/bdj.10.e87638] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 07/19/2022] [Indexed: 11/12/2022] Open
Abstract
Background Knowledge about cyanobacteria diversity in the Azores is spread over several publications, dating from 1874, with some of them not generally available to the scientific community due to their restricted access. The dispersion and sometimes inaccessibility of this information hinder a deeper analysis and a better understanding of the biodiversity of the Azores Islands and more general ecological processes in oceanic islands. Here we present the first checklist of cyanobacteria for the Azores Archipelago with updated taxonomy of all recorded taxa. New information This work provides a compiled and annotated checklist of all known cyanobacteria from the Azores Archipelago with morphological identification from preserved samples and cultures, based on published literature. All records of taxa known to occur in the Azores were taxonomically updated. The present checklist comprises 225 taxa distributed by six orders (Chroococcales, Nostocales, Oscillatoriales, Pleurocapsales, Spirulinales and Synechococcales). Our literature review reveals that the Azores Archipelago hosts a high diversity of cyanobacteria, despite several overlooked habitats that may present great potential regarding cyanobacteria diversity. Increasing efforts to study these neglected habitats could contribute to the knowledge of cyanobacteria taxonomy. This checklist provides the basis for future works on the taxonomy and taxa richness of cyanobacteria in the Azores and the Atlantic Islands, as also for understanding and monitoring non-indigenous and invasive species.
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Affiliation(s)
- Rúben Luz
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Pólo dos Açores, Ponta Delgada, PortugalCIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Pólo dos AçoresPonta DelgadaPortugal,Faculdade de Ciências e Tecnologia, Universidade dos Açores, Ponta Delgada, PortugalFaculdade de Ciências e Tecnologia, Universidade dos AçoresPonta DelgadaPortugal
| | - Rita Cordeiro
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Pólo dos Açores, Ponta Delgada, PortugalCIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Pólo dos AçoresPonta DelgadaPortugal,Faculdade de Ciências e Tecnologia, Universidade dos Açores, Ponta Delgada, PortugalFaculdade de Ciências e Tecnologia, Universidade dos AçoresPonta DelgadaPortugal
| | - Amélia Fonseca
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Pólo dos Açores, Ponta Delgada, PortugalCIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Pólo dos AçoresPonta DelgadaPortugal,Faculdade de Ciências e Tecnologia, Universidade dos Açores, Ponta Delgada, PortugalFaculdade de Ciências e Tecnologia, Universidade dos AçoresPonta DelgadaPortugal
| | - Pedro Miguel Raposeiro
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Pólo dos Açores, Ponta Delgada, PortugalCIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Pólo dos AçoresPonta DelgadaPortugal,Faculdade de Ciências e Tecnologia, Universidade dos Açores, Ponta Delgada, PortugalFaculdade de Ciências e Tecnologia, Universidade dos AçoresPonta DelgadaPortugal
| | - Vítor Gonçalves
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Pólo dos Açores, Ponta Delgada, PortugalCIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Pólo dos AçoresPonta DelgadaPortugal,Faculdade de Ciências e Tecnologia, Universidade dos Açores, Ponta Delgada, PortugalFaculdade de Ciências e Tecnologia, Universidade dos AçoresPonta DelgadaPortugal
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3
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Howard MDA, Kudela RM, Hayashi K, Tatters AO, Caron DA, Theroux S, Oehrle S, Roethler M, Donovan A, Loftin K, Laughrey Z. Multiple co-occurring and persistently detected cyanotoxins and associated cyanobacteria in adjacent California lakes. Toxicon 2021; 192:1-14. [PMID: 33428970 PMCID: PMC8811718 DOI: 10.1016/j.toxicon.2020.12.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 12/11/2020] [Accepted: 12/30/2020] [Indexed: 01/04/2023]
Abstract
The global proliferation of toxin producing cyanobacterial blooms has been attributed to a wide variety of environmental factors with nutrient pollution, increased temperatures, and drought being three of the most significant. The current study is the first formal assessment of cyanotoxins in two impaired lakes, Canyon Lake and Lake Elsinore, in southern California that have a history of cyanobacterial blooms producing high biomass as measured by chl-a. Cyanotoxins in Lake Elsinore were detected at concentrations that persistently exceeded California recreational health thresholds, whereas Canyon Lake experienced persistent concentrations that only occasionally exceeded health thresholds. The study results are the highest recorded concentrations of microcystins, anatoxin-a, and cylindrospermopsin detected in southern California lakes. Concentrations exceeded health thresholds that caused both lakes to be closed for recreational activities. Cyanobacterial identifications indicated a high risk for the presence of potentially toxic genera and agreed with the cyanotoxin results that indicated frequent detection of multiple cyanotoxins simultaneously. A statistically significant correlation was observed between chlorophyll-a (chl-a) and microcystin concentrations for Lake Elsinore but not Canyon Lake, and chl-a was not a good indicator of cylindrospermopsin, anatoxin-a, or nodularin. Therefore, chl-a was not a viable screening indicator of cyanotoxin risk in these lakes. The study results indicate potential acute and chronic risk of exposure to cyanotoxins in these lakes and supports the need for future monitoring efforts to help minimize human and domestic pet exposure and to better understand potential effects to wildlife. The frequent co-occurrence of complex cyanotoxin mixtures further complicates the risk assessment process for these lakes given uncertainty in the toxicology of mixtures.
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Affiliation(s)
- Meredith D A Howard
- Central Valley Regional Water Quality Control Board, 11020 Sun Center Drive, #200, Rancho Cordova, CA, 95670, USA.
| | - Raphael M Kudela
- Department of Ocean Science, University of California, Santa Cruz, 1156 High Street, Santa Cruz, CA, 95064, USA.
| | - Kendra Hayashi
- Department of Ocean Science, University of California, Santa Cruz, 1156 High Street, Santa Cruz, CA, 95064, USA.
| | - Avery O Tatters
- USEPA Gulf Ecosystem Measurement and Modeling Division Laboratory, 1 Sabine Drive, Gulf Breeze, FL, 32561, USA.
| | - David A Caron
- Department of Biological Sciences, University of Southern California, 3616 Trousdale Parkway, Los Angeles, CA, 90089-0371, USA.
| | - Susanna Theroux
- Biogeochemistry Department, Southern California Coastal Water Research Project, 3535 Harbor Blvd., Suite 110, Costa Mesa, CA, 92626, USA.
| | - Stuart Oehrle
- Waters Field Lab, Northern Kentucky University, Chemistry Department, Highland Heights, KY, 41099, USA.
| | - Miranda Roethler
- School of Aquatic and Fishery Sciences, University of Washington, 1122 NE Boat St. Box 355020, Seattle, WA, 98195-5020, USA.
| | - Ariel Donovan
- U.S. Geological Survey, Kansas Water Science Center, Organic Geochemistry Research Laboratory, 1217 Biltmore Drive, Lawrence, KS, 66049, USA.
| | - Keith Loftin
- U.S. Geological Survey, Kansas Water Science Center, Organic Geochemistry Research Laboratory, 1217 Biltmore Drive, Lawrence, KS, 66049, USA.
| | - Zachary Laughrey
- U.S. Geological Survey, Kansas Water Science Center, Organic Geochemistry Research Laboratory, 1217 Biltmore Drive, Lawrence, KS, 66049, USA.
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4
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Dreher TW, Davis EW, Mueller RS. Complete genomes derived by directly sequencing freshwater bloom populations emphasize the significance of the genus level ADA clade within the Nostocales. HARMFUL ALGAE 2021; 103:102005. [PMID: 33980445 DOI: 10.1016/j.hal.2021.102005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 02/20/2021] [Accepted: 02/27/2021] [Indexed: 06/12/2023]
Abstract
The genome sequences of 16 Nostocales cyanobacteria have been determined. Most of them are complete or near-complete genome sequences derived by long-read metagenome sequencing of recent harmful algal blooms (HABs) in freshwater lakes without the potential bias of culture isolation. The genomes are all members of the recently recognized ADA clade (Driscoll et al., Harmful Algae, 77:93, 2018), which we argue represents a genus. We identify 10 putative species-level branches within the clade, on the basis of 91-gene phylogenomic and average nucleotide identity analyses. The assembled genomes each correspond to a single morphotype in the original sample, but distinct genomes from different HABs in some cases correspond to similar morphotypes. We present data indicating that the ADA clade is a highly significant component of current cyanobacterial HABs, including members assigned to the prevalent Dolichospermum and Aphanizomenon genera, as well as Cuspidothrix and Anabaena. In general, currently used genus and species names within the ADA clade are not monophyletic. We infer that the morphological characters routinely used in taxonomic assignments are not reliable for discriminating species within the ADA clade. Taxonomic revisions will be needed to create a genus with a single name (we recommend Anabaena) and to adopt species names that do not depend on morphological traits that lack sufficient discrimination and specificity, while recognizing the utility of some easily observable and distinct morphologies.
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Affiliation(s)
- Theo W Dreher
- Department of Microbiology, Oregon State University, 226 Nash Hall, Corvallis, OR 97331, USA; Center for Genome Research and Biocomputing, Oregon State University, Corvallis, OR 97331, USA.
| | - Edward W Davis
- Center for Genome Research and Biocomputing, Oregon State University, Corvallis, OR 97331, USA
| | - Ryan S Mueller
- Department of Microbiology, Oregon State University, 226 Nash Hall, Corvallis, OR 97331, USA
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5
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Sant'Anna CL, Gama WA, Rigonato J, Correa G, Mesquita MC, Marinho MM. Phylogenetic connection among close genera of Aphanizomenonaceae (Cyanobacteria): Amphiheterocytum gen. nov., Cylindrospermopsis and Sphaerospermopsis. ALGAL RES 2019. [DOI: 10.1016/j.algal.2018.11.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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6
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Tokodi N, Drobac D, Meriluoto J, Lujić J, Marinović Z, Važić T, Nybom S, Simeunović J, Dulić T, Lazić G, Petrović T, Vuković-Gačić B, Sunjog K, Kolarević S, Kračun-Kolarević M, Subakov-Simić G, Miljanović B, Codd GA, Svirčev Z. Cyanobacterial effects in Lake Ludoš, Serbia - Is preservation of a degraded aquatic ecosystem justified? THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 635:1047-1062. [PMID: 29710560 DOI: 10.1016/j.scitotenv.2018.04.177] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 04/13/2018] [Accepted: 04/13/2018] [Indexed: 06/08/2023]
Abstract
Cyanobacteria are present in many aquatic ecosystems in Serbia. Lake Ludoš, a wetland area of international significance and an important habitat for waterbirds, has become the subject of intense research interest because of practically continuous blooming of cyanobacteria. Analyses of water samples indicated a deterioration of ecological condition and water quality, and the presence of toxin-producing cyanobacteria (the most abundant Limnothrix redekei, Pseudanabaena limnetica, Planktothrix agardhii and Microcystis spp.). Furthermore, microcystins were detected in plants and animals from the lake: in macrophyte rhizomes (Phragmites communis, Typha latifolia and Nymphaea elegans), and in the muscle, intestines, kidneys, gonads and gills of fish (Carassius gibelio). Moreover, histopathological deleterious effects (liver, kidney, gills and intestines) and DNA damage (liver and gills) were observed in fish. A potential treatment for the reduction of cyanobacterial populations employing hydrogen peroxide was tested during this study. The treatment was not effective in laboratory tests although further in-lake trials are needed to make final conclusions about the applicability of the method. Based on our observations of the cyanobacterial populations and cyanotoxins in the water, as well as other aquatic organisms and, a survey of historical data on Lake Ludoš, it can be concluded that the lake is continuously in a poor ecological state. Conservation of the lake in order to protect the waterbirds (without urgent control of eutrophication) actually endangers them and the rest of the biota in this wetland habitat, and possibly other ecosystems. Thus, urgent measures for restoration are required, so that the preservation of this Ramsar site would be meaningful.
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Affiliation(s)
- Nada Tokodi
- Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia.
| | - Damjana Drobac
- Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Jussi Meriluoto
- Biochemistry, Faculty of Science and Engineering, Åbo Akademi University, Tykistökatu 6 A, 20520 Turku, Finland; Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Jelena Lujić
- Department of Aquaculture, Szent István University, Páter Károly u. 1, Gödöllő 2100, Hungary
| | - Zoran Marinović
- Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia; Department of Aquaculture, Szent István University, Páter Károly u. 1, Gödöllő 2100, Hungary
| | - Tamara Važić
- Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Sonja Nybom
- Biochemistry, Faculty of Science and Engineering, Åbo Akademi University, Tykistökatu 6 A, 20520 Turku, Finland
| | - Jelica Simeunović
- Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Tamara Dulić
- Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Gospava Lazić
- Scientific Veterinary Institute "Novi Sad", Rumenački put 20, 21000 Novi Sad, Serbia
| | - Tamaš Petrović
- Scientific Veterinary Institute "Novi Sad", Rumenački put 20, 21000 Novi Sad, Serbia
| | - Branka Vuković-Gačić
- Center for Genotoxicology and Ecogenotoxicology, Chair of Microbiology, Faculty of Biology, Studenski Trg 16, University of Belgrade, Belgrade, Serbia
| | - Karolina Sunjog
- Center for Genotoxicology and Ecogenotoxicology, Chair of Microbiology, Faculty of Biology, Studenski Trg 16, University of Belgrade, Belgrade, Serbia
| | - Stoimir Kolarević
- Center for Genotoxicology and Ecogenotoxicology, Chair of Microbiology, Faculty of Biology, Studenski Trg 16, University of Belgrade, Belgrade, Serbia
| | - Margareta Kračun-Kolarević
- Institute for Biological Research "Siniša Stanković", Despota Stefana 142, University of Belgrade, Belgrade, Serbia
| | - Gordana Subakov-Simić
- Faculty of Biology, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia
| | - Branko Miljanović
- Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Geoffrey A Codd
- College of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK
| | - Zorica Svirčev
- Department of Biology and Ecology, Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia; Biochemistry, Faculty of Science and Engineering, Åbo Akademi University, Tykistökatu 6 A, 20520 Turku, Finland
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7
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Yilmaz M, Foss AJ, Selwood AI, Özen M, Boundy M. Paralytic shellfish toxin producing Aphanizomenon gracile strains isolated from Lake Iznik, Turkey. Toxicon 2018; 148:132-142. [DOI: 10.1016/j.toxicon.2018.04.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 04/15/2018] [Accepted: 04/25/2018] [Indexed: 02/01/2023]
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8
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Pham HTL, Nguyen LTT, Duong TA, Bui DTT, Doan QT, Nguyen HTT, Mundt S. Diversity and bioactivities of nostocacean cyanobacteria isolated from paddy soil in Vietnam. Syst Appl Microbiol 2017; 40:470-481. [PMID: 29100656 DOI: 10.1016/j.syapm.2017.08.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 08/05/2017] [Accepted: 08/14/2017] [Indexed: 11/18/2022]
Abstract
Nostocacean cyanobacteria are one of the important components of paddy fields due to their ability to fix atmospheric nitrogen and supply phytohormones for crop growth. In this study, 13 Nostoc strains isolated from paddy soils in Vietnam were classified using a polyphasic approach. The results showed a high diversity of the isolated strains that represented seven morphotypes corresponding to five genotypes, with 16S rRNA gene sequence similarity values ranging between 94.97-99.78% compared to the available sequences from GenBank. Bioassay assessment revealed that 11 out of 13 strains possessed antibacterial activities, three of which exhibited cytotoxic activities on MCF7 and HCT116 cells with an IC50 ranging from 47.8μgmL-1 to 232.0μgmL-1. Interestingly, strains with identical 16S rRNA gene sequences displayed different antibacterial and cytotoxic activity profiles.
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Affiliation(s)
- Hang T L Pham
- Faculty of Biology, VNU University of Science, Hanoi, Vietnam; The Key Laboratory of Enzyme and Protein Technology, VNU University of Science, Hanoi, Vietnam.
| | - Lien T T Nguyen
- Institute of Biotechnology, Hue University, Thua Thien Hue, Vietnam
| | - Tuan A Duong
- Department of Genetics, Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria, South Africa
| | - Dung T T Bui
- Faculty of Biology, VNU University of Science, Hanoi, Vietnam
| | - Que T Doan
- Faculty of Biology, VNU University of Science, Hanoi, Vietnam
| | - Ha T T Nguyen
- Faculty of Biology, VNU University of Science, Hanoi, Vietnam
| | - Sabine Mundt
- Department of Pharmaceutical Biology, Institute of Pharmacy, Ernst-Moritz-Arndt University, 17491 Greifswald, Germany
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9
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Capelli C, Ballot A, Cerasino L, Papini A, Salmaso N. Biogeography of bloom-forming microcystin producing and non-toxigenic populations of Dolichospermum lemmermannii (Cyanobacteria). HARMFUL ALGAE 2017; 67:1-12. [PMID: 28755712 DOI: 10.1016/j.hal.2017.05.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 03/17/2017] [Accepted: 05/06/2017] [Indexed: 06/07/2023]
Abstract
In the last decades, the cyanobacterium Dolichospermum lemmermannii showed an increasing spread to Southern Europe, raising serious concerns due to its ability to produce cyanotoxins. The widening of its geographic distribution and the observation of strains showing high optimum temperature underline its ecological heterogeneity, suggesting the existence of different ecotypes. To investigate its biogeography, new isolates from different European water bodies, together with strains maintained by the Norwegian Institute for Water Research Culture Collection of Algae, were genetically characterised for the 16S rRNA gene and compared with strains obtained from public repositories. Geographic distance highly influenced the differentiation of genotypes, further suggesting the concurrent role of geographic isolation, physical barriers and environmental factors in promoting the establishment of phylogenetic lineages adapted to specific habitats. Differences among populations were also examined by morphological analysis and evaluating the toxic potential of single strains, which revealed the exclusive ability of North European strains to produce microcystins, whereas the populations in Southern Europe tested negative for a wide range of cyanotoxins. The high dispersion ability and the existence of toxic genotypes indicate the possible spread of harmful blooms in other temperate regions.
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Affiliation(s)
- Camilla Capelli
- Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38010 San Michele all'Adige, TN, Italy; Department of Biology, University of Florence, Via Madonna del Piano 6, 50019 Sesto Fiorentino, Firenze, Italy.
| | - Andreas Ballot
- Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, 0349 Oslo, Norway
| | - Leonardo Cerasino
- Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38010 San Michele all'Adige, TN, Italy
| | - Alessio Papini
- Department of Biology, University of Florence, Via Madonna del Piano 6, 50019 Sesto Fiorentino, Firenze, Italy
| | - Nico Salmaso
- Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38010 San Michele all'Adige, TN, Italy
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10
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Li X, Dreher TW, Li R. An overview of diversity, occurrence, genetics and toxin production of bloom-forming Dolichospermum (Anabaena) species. HARMFUL ALGAE 2016; 54:54-68. [PMID: 28073482 DOI: 10.1016/j.hal.2015.10.015] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 10/19/2015] [Accepted: 10/24/2015] [Indexed: 05/12/2023]
Abstract
The new genus name Dolichospermum, for most of the planktonic former members of the genus Anabaena, is one of the most ubiquitous bloom-forming cyanobacterial genera. Its dominance and persistence have increased in recent years, due to eutrophication from anthropogenic activities and global climate change. Blooms of Dolichospermum species, with their production of secondary metabolites that commonly include toxins, present a worldwide threat to environmental and public health. In this review, recent advances of the genus Dolichospermum are summarized, including taxonomy, genetics, bloom occurrence, and production of toxin and taste-and-odor compounds. The recent and continuing acquisition of genome sequences is ushering in new methods for monitoring and understanding the factors regulating bloom dynamics.
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Affiliation(s)
- Xiaochuang Li
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Theo W Dreher
- Department of Microbiology, Oregon State University, Corvallis, OR, USA; Center for Genome Research and Biocomputing, Oregon State University, Corvallis, OR, USA
| | - Renhui Li
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China.
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11
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Mariani MA, Padedda BM, Kaštovský J, Buscarinu P, Sechi N, Virdis T, Lugliè A. Effects of trophic status on microcystin production and the dominance of cyanobacteria in the phytoplankton assemblage of Mediterranean reservoirs. Sci Rep 2015; 5:17964. [PMID: 26648532 PMCID: PMC4673696 DOI: 10.1038/srep17964] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 11/09/2015] [Indexed: 11/09/2022] Open
Abstract
The aim of our study was to evaluate the abundance of cyanobacteria and microcystins in four Sardinian reservoirs (Italy) characterised by different trophic status to define a reference picture for future changes. Increasing levels of eutrophication and the abundance of cyanobacteria are expected to occur due to climate change, especially in the southern Mediterranean. Consequently, an in-depth study of the occurrence of harmful cyanobacteria is important to develop appropriate management strategies for water resources at a local scale. Monthly samples were collected at one station in each reservoir over an 18-month period. The Analysis of similarity indicated that cyanobacterial abundance and species composition differed significantly among the reservoirs. The Redundancy analysis highlighted their relationship to trophic, hydrological and seasonal patterns. Spearman’s analysis indicated that there were significant correlations among the most important species (Planktothrix agardhii–rubescens group, Aphanizomenon flos-aquae and Dolichospermum planctonicum), nutrients and microcystins. We highlighted that the species composition during periods of maximum microcystin concentrations differed from those typically reported for other Mediterranean sites. We found new potential microcystin producers (Aphanizomenon klebahnii, Dolichospermum macrosporum and Dolichospermum viguieri), which emphasised the high diversity of cyanobacteria in the Mediterranean area and the need for detailed research at the local scale.
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Affiliation(s)
- Maria Antonietta Mariani
- University of Sassari, Dipartimento di Architettura, Design e Urbanistica, Via Piandanna 4, 07100 Sassari, Italy
| | - Bachisio Mario Padedda
- University of Sassari, Dipartimento di Architettura, Design e Urbanistica, Via Piandanna 4, 07100 Sassari, Italy
| | - Jan Kaštovský
- University of South Bohemia, Faculty of Science, Department of Botany, České Budějovice, Czech Republic
| | - Paola Buscarinu
- Ente acque della Sardegna, Settore della limnologia degli invasi, Viale Elmas 116, 09122 Cagliari, Italy
| | - Nicola Sechi
- University of Sassari, Dipartimento di Architettura, Design e Urbanistica, Via Piandanna 4, 07100 Sassari, Italy
| | - Tomasa Virdis
- Ente acque della Sardegna, Settore della limnologia degli invasi, Viale Elmas 116, 09122 Cagliari, Italy
| | - Antonella Lugliè
- University of Sassari, Dipartimento di Architettura, Design e Urbanistica, Via Piandanna 4, 07100 Sassari, Italy
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Genuário DB, Corrêa DM, Komárek J, Fiore MF. Characterization of freshwater benthic biofilm-forming Hydrocoryne (Cyanobacteria) isolates from Antarctica. JOURNAL OF PHYCOLOGY 2013; 49:1142-1153. [PMID: 27007634 DOI: 10.1111/jpy.12124] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 08/27/2013] [Indexed: 06/05/2023]
Abstract
The aims of this work were to study cyanobacterial isolates resembling the genus Hydrocoryne using a combination of morphology and phylogeny of 16S rRNA and nifH sequences and to investigate genes involved in cyanotoxin and protease inhibitor production. Four new cyanobacterial strains, isolated from biofilm samples collected from King George Island, Antarctica, were studied. In terms of morphology, these new strains share traits similar to true Anabaena morphotypes (benthic ones), whereas phylogenetic analysis of their 16S rRNA gene sequences grouped them with the sequence of the type species Hydrocoryne spongiosa (H. Schwabe ex Bornet and Flahault 1886-1888), but not with sequences of the type species from the genus Anabaena. This cluster is the sister group of Anabaena morphotypes isolated only from the Gulf of Finland. In addition, this cluster is related to two other clusters formed by sequences of Anabaena isolated from different sites. Partial nifH genes were sequenced from two strains and the phylogenetic tree revealed that the Antarctic nifH sequences clustered with sequences from Anabaena. Furthermore, two strains were tested, using PCR with specific primers, for the presence of genes involved in cyanotoxins (microcystin and saxitoxin) and protease inhibitor (aeruginosin, and cyanopeptolin). Only cyanopeptolin was amplified using PCR. These four Hydrocoryne strains are the first to be isolated and sequenced from Antarctica, which improves our knowledge on this poorly defined cyanobacterial genus.
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Affiliation(s)
- Diego Bonaldo Genuário
- Center for Nuclear Energy in Agriculture, University of São Paulo, Avenida Centenário 303, Piracicaba, São Paulo, 13400-970, Brazil
| | - Débora Machado Corrêa
- Botany Department, Federal University of Viçosa, Avenida Peter Henry Rolfs, s/n, Viçosa, Minas Gerais, 36570-000, Brazil
| | - Jiří Komárek
- Institute of Botany, Czech Academy of Sciences, Dukelská 135, Třeboň, CZ-37982, Czech Republic
- Faculty of Science, University of South Bohemia, Branišovská 35, České Budějovice, CZ-37005, Czech Republic
| | - Marli Fátima Fiore
- Center for Nuclear Energy in Agriculture, University of São Paulo, Avenida Centenário 303, Piracicaba, São Paulo, 13400-970, Brazil
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