Environmental microbiology最新文献

Influence of Seasonal Succession on Microbiological and Physiochemical Composition in Shallow Estuarine Sediments 季节演替对河口浅层沉积物微生物和理化组成的影响

IF 5.1 2区生物学

Environmental microbiology Pub Date : 2025-10-15 DOI: 10.1111/1462-2920.70194

Malique R. Bowen, Felix E. Agblemanyo, Porscha M. Persad, Andrew S. Wozniak, Jennifer F. Biddle

{"title":"Influence of Seasonal Succession on Microbiological and Physiochemical Composition in Shallow Estuarine Sediments","authors":"Malique R. Bowen, Felix E. Agblemanyo, Porscha M. Persad, Andrew S. Wozniak, Jennifer F. Biddle","doi":"10.1111/1462-2920.70194","DOIUrl":"https://doi.org/10.1111/1462-2920.70194","url":null,"abstract":"Marine sediments harbour diverse microbial populations, but with increasing depth, these microbes are thought to have low activity due to depleted electron acceptors and lack of new organic matter after burial. However, physiochemical changes in environmental parameters could impact the metabolic activity of microbes in marine sediments. We performed seasonal sampling of shallow sediments to examine changes in population and abundance in relation to physiochemical changes over the year. We used amplicon sequencing, quantitative PCR and geochemistry to assess seasonal abundance of microbial populations at 3 depths (12–14, 38–40 and 48–50 cm) in shallow coastal sediments. 16S rRNA amplicon sequencing showed the sediment microbiome consists of common sediment taxa with minor seasonal variation. However, bacterial gene counts of 16S rRNA genes were highest in summer (2.50 × 1012 genes/g of sediment) and lowest in spring (1.64 × 1011 genes/g sediment). We observed differences in sediment temperature at depth across seasons (Summer 28°C–25.5°C; Winter 8.7°C–6.3°C) and correlated changes in dissolved organic matter composition that are not typically reported for this environment. We conclude deeper microbial populations in shallow sediments may experience seasonal abundance shifts resulting in a more variable subsurface community than initially presumed in the literature.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"1 1","pages":"e70194"},"PeriodicalIF":5.1,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145296122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fossilisation of Fish Soft Tissue in Oxidative Microniches of Anoxic Sediments 缺氧沉积物氧化微生境中鱼类软组织的石化。

IF 4 2区生物学

Environmental microbiology Pub Date : 2025-10-09 DOI: 10.1111/1462-2920.70188

Amy L. Elson, Lorenz Schwark, Paul F. Greenwood, Madison Tripp, Alex I. Holman, Michael E. Böttcher, Peter Hopper, Robert H. C. Madden, Luke M. Brosnan, Jessica H. Whiteside, Stephen F. Poropat, Lance Grande, William D. A. Rickard, Kliti Grice

{"title":"Fossilisation of Fish Soft Tissue in Oxidative Microniches of Anoxic Sediments","authors":"Amy L. Elson, Lorenz Schwark, Paul F. Greenwood, Madison Tripp, Alex I. Holman, Michael E. Böttcher, Peter Hopper, Robert H. C. Madden, Luke M. Brosnan, Jessica H. Whiteside, Stephen F. Poropat, Lance Grande, William D. A. Rickard, Kliti Grice","doi":"10.1111/1462-2920.70188","DOIUrl":"10.1111/1462-2920.70188","url":null,"abstract":"<div>\u0000 \u0000 Organic analyses of past organisms enhance our understanding of Earth's evolutionary history, complementing the macrofossil record. Biomolecular remains are typically vulnerable to diagenetic mineralisation, but can persist in exceptional depositional settings such as Lagerstätten. Their preservation is usually linked to anoxic conditions that exclude aerobic degraders. However, we report intact skin tissue of the fossil fish Diplomystus dentatus from the Fossil Basin Lagerstätte (USA), preserved through phosphate permineralisation in an oxygen-enriched microenvironment. Notably, only the skin with scales retained tissue integrity, and this organic material was closely associated with fluorapatite absent from the surrounding matrix. Geochemical analyses revealed higher oxidation states in the skin than in vertebrae and bones, likely due to early degradation of the fatty acid-rich dermis. Redox-sensitive biomarkers and isotopic data (δ15N) indicated a less reducing environment in the skin region compared to bones and the eye, yet more reducing than the surrounding sediment. This localised oxygen enrichment fostered sulphide-oxidising bacteria, evidenced by mineral sulphates (barite) found only in the skin. Phosphatisation was likely driven by dermal breakdown and the release of H+, reducing alkalinity and enabling phosphate mineralisation over the carbonate system.\u0000 </div>","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145254793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identification and Global Distribution of a Core Microbiome From High-Arctic Lakes 高北极湖泊核心微生物组的鉴定和全球分布。

IF 4 2区生物学

Environmental microbiology Pub Date : 2025-10-07 DOI: 10.1111/1462-2920.70182

Emily N. Hallett, Jérôme Comte

{"title":"Identification and Global Distribution of a Core Microbiome From High-Arctic Lakes","authors":"Emily N. Hallett, Jérôme Comte","doi":"10.1111/1462-2920.70182","DOIUrl":"10.1111/1462-2920.70182","url":null,"abstract":"Arctic lakes are sentinels of climate change, yet their microbial community structure and functioning remain poorly understood. This study analysed the genetic content of clear-water Arctic lakes and their surroundings using high-throughput amplicon sequencing of the 16S rRNA gene to identify their core microbiome and its contribution to the overall taxonomy pool. To assess geographical constraints and oligotrophic conditions, these results were compared with a latitudinally diverse multi-basin oligotrophic lake in a temperate climate. Arctic and temperate lakes exhibited different assemblages, but both showed similar transitional gradients of microbial community composition from upstream soils/inlets through the lake system to the outlet, driven mainly by the dissolved organic matter (DOM) characteristics. Distinct core microbiomes were identified for temperate and Arctic lakes, with Arctic lakes appearing more diverse. A limited shared core microbiome was observed between the two regions, composed mostly of typical freshwater bacteria. While core taxa identities differed between regions, most exhibited characteristics of generalist bacteria with a strong global presence. These results provide key insights into the structure of remote high Arctic lakes, contributing to our understanding of aquatic microbial ecology in a transitioning Arctic and identifying microbial communities and individual taxa of interest for further study on oligotrophy.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70182","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145241121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Historical Land Use Drives Present Microbial Community Assembly in an Extreme Environment 极端环境下历史土地利用驱动微生物群落聚集。

IF 4 2区生物学

Environmental microbiology Pub Date : 2025-10-07 DOI: 10.1111/1462-2920.70189

Kenji Maurice, Julien Roy, Hassan Boukcim, Marc-André Selosse, Marc Ducousso

{"title":"Historical Land Use Drives Present Microbial Community Assembly in an Extreme Environment","authors":"Kenji Maurice, Julien Roy, Hassan Boukcim, Marc-André Selosse, Marc Ducousso","doi":"10.1111/1462-2920.70189","DOIUrl":"10.1111/1462-2920.70189","url":null,"abstract":"The extent to which past disturbances influence present-day microbial composition and assembly remains poorly understood, especially in extreme environments such as deserts. Using a phylogenetic framework of diversity partitioning, linked to soil composition, we aimed to disentangle the impacts of past disturbance on present-day bacterial and fungal communities, where we also distinguish abundant and rare taxa. Our findings demonstrate that past agricultural activity promoted strong phylogenetic clustering and turnover, accompanied by increased phylogenetic diversity and niche width, reflecting the influence of transient resource availability and niche diversification. Conversely, long-term disturbances reduced phylogenetic diversity and niche width while amplifying selection processes and phylogenetic turnover. These patterns indicate intensified abiotic constraints in this system, where historical contingencies—characterised by enduring drought-wetting cycles—differentially shaped bacterial and fungal communities. Rare taxa were more sensitive to land use and deterministic, while abundant taxa showed broader niche adaptability and stochastic influences, highlighting the need for targeted conservation strategies. This work highlights the critical role of historical disturbances in shaping microbial assembly, provides actionable insights into enhancing desert ecosystem resilience and informing sustainable restoration practices. Si content—a key driver of phylogenetic turnover—could be targeted for ecosystem recovery and conservation strategies in degraded arid regions.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70189","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145241085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Substrate Effect on the Contribution of Ammonium and Urea to Marine Nitrification and Nitrous Oxide Production 基质对氨和尿素对海洋硝化和氧化亚氮产量贡献的影响

IF 4 2区生物学

Environmental microbiology Pub Date : 2025-10-06 DOI: 10.1111/1462-2920.70187

Weiyi Tang, Catherine Hexter, Rongbo Dai, Samantha G. Fortin, John C. Tracey, Naomi Intrator, Moriah A. Kunes, Xianhui S. Wan, Amal Jayakumar, Dalin Shi, Bess B. Ward

{"title":"Substrate Effect on the Contribution of Ammonium and Urea to Marine Nitrification and Nitrous Oxide Production","authors":"Weiyi Tang, Catherine Hexter, Rongbo Dai, Samantha G. Fortin, John C. Tracey, Naomi Intrator, Moriah A. Kunes, Xianhui S. Wan, Amal Jayakumar, Dalin Shi, Bess B. Ward","doi":"10.1111/1462-2920.70187","DOIUrl":"10.1111/1462-2920.70187","url":null,"abstract":"Nitrification (microbial oxidation of ammonia to nitrite and nitrate) controls nitrogen speciation and is the main source of nitrous oxide (N2O) in the ocean. It was recently shown that the most abundant marine ammonia oxidizers, the ammonia-oxidising archaea (AOA), are also capable of oxidising urea, providing a previously ignored source of nitrite. Here, we show that the relative magnitude of urea and ammonia oxidation rates, and the relative rates of N2O production from the two substrates, is correlated with the ratio of the substrate concentrations. By examining all reported measurements of urea and ammonium concentrations and the paired urea and ammonia oxidation rates, we show that this relationship likely holds across the global ocean. Examination of newly acquired and previously published metagenomic data shows that the fraction of AOA with the genetic capability for urea oxidation increases with the urea:ammonium ratio, rather than depending on the urea or ammonium concentration alone. These results corroborate the correlation between substrate ratios and oxidation rate ratios, and extend it to N2O production. This may help explain the distribution of nitrification rates and N2O production in the ocean.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70187","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145235330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatio-Temporal Resolution of Microbial Functions and Taxa Associated With Cyanobacterial Harmful Algae Blooms Along a 500-Km Aquatic Continuum in the Lake Erie Watershed 伊利湖流域500公里水体连续体蓝藻有害藻华相关微生物功能和分类群的时空解析

IF 4 2区生物学

Environmental microbiology Pub Date : 2025-10-03 DOI: 10.1111/1462-2920.70183

Sophie Crevecoeur, Lori Phillips, Arthur Zastepa, Jérôme Comte, Ngan Diep, Alice Dove, Thomas Edge, Thijs Frenken, R. Michael McKay, Susan B. Waston

{"title":"Spatio-Temporal Resolution of Microbial Functions and Taxa Associated With Cyanobacterial Harmful Algae Blooms Along a 500-Km Aquatic Continuum in the Lake Erie Watershed","authors":"Sophie Crevecoeur, Lori Phillips, Arthur Zastepa, Jérôme Comte, Ngan Diep, Alice Dove, Thomas Edge, Thijs Frenken, R. Michael McKay, Susan B. Waston","doi":"10.1111/1462-2920.70183","DOIUrl":"10.1111/1462-2920.70183","url":null,"abstract":"Biogeochemical processes rendered by the aquatic microbiome could influence the development of cyanobacterial harmful algal blooms (cHABs), but those biotic factors are poorly understood and rarely considered. We focused on the link between microbial functions, community composition and environmental gradients along the Thames River–Lake St. Clair–Detroit River–Lake Erie corridor across different seasons. We measured the abundance and expression (transcripts) of genes involved in nutrient cycling and microcystin toxin production with qPCR and determined microbial community composition with high-throughput sequencing of the 16S rRNA gene. Throughout the year, genes and transcripts involved in P acquisition, denitrification and N fixation were in higher abundance upstream in the Thames River and Lake St. Clair. Gene abundance, rather than expression, correlated with environmental variables, but functional changes were linked to changes in the aquatic microbiome and did not respond directly to larger environmental gradients. Network analysis revealed tighter connections between gene expression and biotic variables than gene presence, with ubiquitous and streamlined-genomes microbes associated with the dominant bloom-causing cyanobacteria, highlighting the cooperative dynamic of these associations. Overall, the results highlight the link between the changing microbiome, microbial processes and the watershed influence in the presence of cHABs.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70183","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Water Deficit Stress Alters the Microbial Community Assembly, Structure, and Sources in Corn and Sugar Beet. 水分亏缺胁迫改变玉米和甜菜微生物群落组成、结构和来源。

IF 5.1 2区生物学

Environmental microbiology Pub Date : 2025-10-01 DOI: 10.1111/1462-2920.70186

Kathryn Bazany,Avinash Dhar,Kristen Otto,Yuan Jing,Pankaj Trivedi

{"title":"Water Deficit Stress Alters the Microbial Community Assembly, Structure, and Sources in Corn and Sugar Beet.","authors":"Kathryn Bazany,Avinash Dhar,Kristen Otto,Yuan Jing,Pankaj Trivedi","doi":"10.1111/1462-2920.70186","DOIUrl":"https://doi.org/10.1111/1462-2920.70186","url":null,"abstract":"Plant-associated microbes can improve plant fitness under abiotic stress conditions like drought by providing stress-relieving benefits to the host; however, there is limited research on the complex ways in which microbial communities assemble in plants under varying environmental conditions. In a field study, we examined the bacterial, fungal, and protist communities of the rhizospheres, roots, and leaves of corn and sugar beet grown under irrigated and water deficit conditions. We hypothesised that water deficit would alter the community composition and structure of plant microbiomes by shifting the relative importance of community assembly processes and the patterns of movement from microbial sources to sinks. Using amplicon sequencing and modelling approaches, we found that the water deficit treatment led to key differences in microbial community structure and that these changes were likely driven by differences in community assembly processes and microbial source communities. Altogether, these results indicate that plant microbiome communities are shaped by available microbial sources, host selection factors, microbial interactions, and stochastic forces, and that each of these factors is influenced by osmotic stress. These findings highlight the importance of applying ecological concepts to plant microbiome research in order to elucidate the impacts of environmental factors on microbial community assembly.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"7 1","pages":"e70186"},"PeriodicalIF":5.1,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145277123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Micropollutants and Their Interactions With Relevant Environmental Viruses 微污染物及其与相关环境病毒的相互作用

IF 4 2区生物学

Environmental microbiology Pub Date : 2025-10-01 DOI: 10.1111/1462-2920.70184

Catielen Paula Pavi, Mariana Alves Elois, Yasmin Ferreira Souza Hoffmann Jempierre, Rafael Dorighello Cadamuro, Beatriz Pereira Savi, Giulia Von Tönnemann Pilati, Gislaine Fongaro

{"title":"Micropollutants and Their Interactions With Relevant Environmental Viruses","authors":"Catielen Paula Pavi, Mariana Alves Elois, Yasmin Ferreira Souza Hoffmann Jempierre, Rafael Dorighello Cadamuro, Beatriz Pereira Savi, Giulia Von Tönnemann Pilati, Gislaine Fongaro","doi":"10.1111/1462-2920.70184","DOIUrl":"10.1111/1462-2920.70184","url":null,"abstract":"Emerging pollutants encompass a diverse array of chemicals classified as micropollutants, including pharmaceuticals and microplastics (MPs). Viruses are known to adsorb onto MPs, including binding to bacterial biofilms that form the plastisphere. In this review, we conducted an extensive bibliographic survey to critically assess the potential interactions between micropollutants, such as MPs, organic micropollutants and viruses in aquatic environments, within the One Health context. The interaction between viruses and bacterial cell wall components can increase the infectivity and thermal stability of viral particles, which thrive on biofilms commonly found on MPs in aquatic systems. MPs, acting as viral vectors, can impact viral life cycles, survival, transmission and interaction with hosts, posing significant risks to human, animal and environmental health. There is a clear need for additional practical studies to understand how viruses remain stable when in contact with micropollutants. This field of research provides opportunities to better understand the broader impacts of these interactions, including the potential for new viral outbreaks due to the prolonged persistence of pathogens in the environment.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70184","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145203172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of Salinity on Cell Surface Chemistry of Cyanobacteria From Freshwater, Marine and Alkaline Environments: A Hidden Phosphorus Engine 盐度对淡水、海洋和碱性环境蓝藻细胞表面化学的影响：一个隐藏的磷引擎。

IF 4 2区生物学

Environmental microbiology Pub Date : 2025-09-30 DOI: 10.1111/1462-2920.70180

David Aceituno-Caicedo, Nigarsan Kokilathasan, Yuwei Zhao, Maria Dittrich

{"title":"Impact of Salinity on Cell Surface Chemistry of Cyanobacteria From Freshwater, Marine and Alkaline Environments: A Hidden Phosphorus Engine","authors":"David Aceituno-Caicedo, Nigarsan Kokilathasan, Yuwei Zhao, Maria Dittrich","doi":"10.1111/1462-2920.70180","DOIUrl":"10.1111/1462-2920.70180","url":null,"abstract":"Climate change is altering ocean salinity, impacting cyanobacteria, key primary producers with vital ecological roles. While cyanobacterial adaptations to salinity are well studied, molecular cell surface chemistry changes remain underexplored. This study examines the impact of salinity on surface properties of freshwater Synechocystis sp. PCC6803, marine Synechococcus sp. PCC8806 and alkaliphilic Spirulina platensis. Species were cultured under salinities of 2‰, 6‰, 10‰, 30‰ and 60‰. Surface chemical composition and content were characterised using infrared and x-ray photoelectron spectroscopy and potentiometric titration. All strains exhibited salinity-dependent changes in surface charge and functional group expression, reflecting distinct adaptation strategies. In non-marine strains, salinity stress led to decreased phosphoryl signals and increased lipid saturation, consistent with phospholipid replacement and reduced membrane fluidity. We propose membrane phospholipids as a phosphorus reservoir, mobilised to support biosynthesis and ion homeostasis. In contrast, Syn. PCC8806 increased phosphoryl-associated signals and membrane fluidity across salinity conditions, consistent with phosphatidylglycerol enrichment to maintain photosynthetic function. Surface chemical shifts support a model where membrane remodelling is central to species-specific acclimatisation, balancing nutrient conservation with functional integrity. This work enhances understanding of microbial adaptation under osmotic stress and provides insight for predicting cyanobacterial blooms, designing biotechnological systems.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 10","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70180","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145189525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phylogenomics Untangles the Metabolic Potential of Picochlorum tauri, a New Picoalgal Species Causing a Winter Bloom in the Mediterranean Thau Lagoon 系统基因组学揭示了导致地中海Thau泻湖冬季水华的新皮藻——牛皮藻的代谢潜力

IF 4 2区生物学

Environmental microbiology Pub Date : 2025-09-24 DOI: 10.1111/1462-2920.70174

Béatrice Bec, Franck Lagarde, Angélique Gobet, Riccardo Aiese Cigliano, Marco Di Marsico, Jean-Michel Hermel, Marion Richard, Emilie Le Floc’h, Robert van Lis, Ariane Atteia

{"title":"Phylogenomics Untangles the Metabolic Potential of Picochlorum tauri, a New Picoalgal Species Causing a Winter Bloom in the Mediterranean Thau Lagoon","authors":"Béatrice Bec, Franck Lagarde, Angélique Gobet, Riccardo Aiese Cigliano, Marco Di Marsico, Jean-Michel Hermel, Marion Richard, Emilie Le Floc’h, Robert van Lis, Ariane Atteia","doi":"10.1111/1462-2920.70174","DOIUrl":"10.1111/1462-2920.70174","url":null,"abstract":"In the winter of 2018–2019, the Mediterranean Thau lagoon experienced an intense green bloom with severe ecological consequences. Here, we aimed at identifying the blooming species and deciphering its metabolic potential. The blooming alga was identified by a metabarcoding approach and later isolated in an axenic form. High-quality nuclear and organellar genome sequences were generated. Phylogenetic and phylogenomic analyses revealed that the alga is a new member of the genus Picochlorum (Trebouxiophyceae, Chlorophyta) that we named Picochlorum tauri. Comparative genomic analyses were conducted to provide insights into (i) genome reduction in the Picochlorum genus with respect to other trebouxiophycean genera and (ii) the metabolic specificities of P. tauri with respect to other eukaryotic picophytoplankton. Genome mining unveiled in P. tauri an extended gene repertoire for carbon concentrating mechanisms, a reduced number of routes for acetyl-CoA synthesis from pyruvate and citrate, and a vitamin B12-dependent carboxylation pathway for propionyl-CoA breakdown. By contrast to the surveyed photosynthetic picoeukaryotes, P. tauri has specific functional traits linked to carbon metabolism, vitamin and chlorophyll synthesis, which are expected to boost physiology. These traits might have contributed to the fast development and maintenance of P. tauri in cool waters under low solar radiance.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 9","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70174","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145127339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0