Journal of Eukaryotic Microbiology最新文献_第10页

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-11-24 DOI: 10.1111/jeu.70054

引用次数: 0

Metabolic Adaptations of Benthic Forams: Foraminiferal Species Adaptations to Intertidal Mudflat Assessed by a Metabolic Approach 底栖有孔虫的代谢适应：用代谢方法评估有孔虫物种对潮间带泥滩的适应。

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-11-11 DOI: 10.1111/jeu.70051

Julia Courtial, Jeremy Lothier, Caroline Cukier, Anis M. Limami, Emmanuelle Geslin

{"title":"Metabolic Adaptations of Benthic Forams: Foraminiferal Species Adaptations to Intertidal Mudflat Assessed by a Metabolic Approach","authors":"Julia Courtial, Jeremy Lothier, Caroline Cukier, Anis M. Limami, Emmanuelle Geslin","doi":"10.1111/jeu.70051","DOIUrl":"10.1111/jeu.70051","url":null,"abstract":"Benthic foraminifera are characterized by their rapid response and high resistance to variable and extreme conditions such as those typically found in intertidal environments. However, knowledge of cellular and metabolic adaptations by foraminifera remains incomplete. Here we explore the metabolic profile of three species from an intertidal mudflat: Haynesina germanica (kleptoplast, mixotrophic), Elphidium oceanense, and Ammonia confertitesta (heterotrophic). Given the challenges associated with culturing foraminifera, specimens were collected directly from the field. To analyze their metabolic profiles, a non-targeted gas chromatography–mass spectrometry methodology was optimized with the aim of reducing sample size. We constructed a foraminifera-specific library containing 382 features. Within the 30 metabolites identified, those present in all three species include osmolytes, oxidant- and thermo-protective molecules, which are consistent with their high tolerance to variations in environmental conditions. Species-specific features were also observed. A. confertitesta accumulates myoinositol, aspartate, and asparagine. H. germanica accumulated malate, glycerate, and glycolate/glyoxylate, indicating concurrent activity of a C4-like carbon concentrating mechanism and photorespiratory metabolism. Our approach enabled us to discriminate between the species based on their metabolites and highlights two probable metabolic pathways not previously described in kleptoplast foraminifera. These metabolic adaptations likely contribute to the ecological success of intertidal foraminiferal species.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12605782/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145495741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Long Term Copepod Culture Houses a Rich Microbial Eukaryotic Community Including New and Known Symbionts 长期桡足动物培养拥有丰富的微生物真核生物群落，包括新的和已知的共生体。

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-11-03 DOI: 10.1111/jeu.70053

Lasse K. Eliassen, Dag Altin, Tom Andersen, Lasse Riemann, Micah Dunthorn, Josefin Titelman

{"title":"Long Term Copepod Culture Houses a Rich Microbial Eukaryotic Community Including New and Known Symbionts","authors":"Lasse K. Eliassen, Dag Altin, Tom Andersen, Lasse Riemann, Micah Dunthorn, Josefin Titelman","doi":"10.1111/jeu.70053","DOIUrl":"10.1111/jeu.70053","url":null,"abstract":"Copepods, dominant marine zooplankton, are hosts to microbial eukaryotic symbionts, but the copepod eukaryome remains largely unexplored. We used 18S rRNA gene primers with reduced metazoan amplification to identify microbial eukaryotes in a culture of Calanus finmarchicus (Copepoda). Samples were taken from the inlet water (99.5% of reads from non-copepod sources) and the contents of the culture, which included ambient water (99.7%), bulk (many crushed copepods, 60.2%), individual copepods (1%–41%, mean = 7.4), and bulk fecal pellets (74%). The microbial eukaryotic community in the culture differed from the inlet water. The culture contained saprotrophs and bacterivores typical of eutrophic aquacultures and known parasites of copepods. Individual copepod eukaryomes varied in richness (8–33 operational taxonomic units, mean = 16.1) and revealed variation in non-copepod read yields related to specific taxa. Perkinsea, not previously reported in copepods, as well as Ascomycota and Basidiomycota (Fungi), formed the core eukaryome (found in > 90% of individuals), indicating potentially important symbiosis. The small eukaryome, relative to reported microbiomes in C. finmarchicus, suggests that ecological inferences from microbiomes, which largely address bacteria, are not readily applicable to the eukaryotic microbes. The study underpins the need for investigations of eukaryomes.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12583399/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145438166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

New Combination of the “Rhizarian Rider” Phenomenon, Brachyscelus crusculum Bate, 1861 (Crustacea, Amphipoda, Brachyscelidae) and Odontosphaera sp. (Radiolaria, Collodaria, Collosphaeridae) “根瘤菌骑士”现象，Brachyscelus crusculum Bate, 1861（甲壳纲，Amphipoda, Brachyscelidae）和Odontosphaera sp. （Radiolaria, Collodaria, collosphaidae）的新组合。

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-10-24 DOI: 10.1111/jeu.70052

Yasuhide Nakamura, Osamu Hoshino, Nobuhiro Saito, Sarasa Nagatsuka

引用次数: 0

Description of a New Telonemia Genus and Species With Novel Observations Providing Insights Into Its Hidden Diversity 一个新的龙葵属和种的描述与新的观察提供了对其隐藏多样性的见解。

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-10-23 DOI: 10.1111/jeu.70050

Helena Mostazo-Zapata, Alex Gàlvez-Morante, Cédric Berney, Xènia Maya-Figuerola, Cristiana Sigona, David López-Escardó, Elisabet L. Sà, Dolors Vaqué, Daniel J. Richter

{"title":"Description of a New Telonemia Genus and Species With Novel Observations Providing Insights Into Its Hidden Diversity","authors":"Helena Mostazo-Zapata, Alex Gàlvez-Morante, Cédric Berney, Xènia Maya-Figuerola, Cristiana Sigona, David López-Escardó, Elisabet L. Sà, Dolors Vaqué, Daniel J. Richter","doi":"10.1111/jeu.70050","DOIUrl":"10.1111/jeu.70050","url":null,"abstract":"Telonemia is a fascinating and understudied group of microbial eukaryotes known to have a vast diversity that is still uncharacterized. In fact, although their phylogenetic position is still actively debated, their diversity and biology are largely unexplored: to date, there are only seven described species in three genera, although there are estimated to be hundreds more unknown lineages. Here, we describe the isolation and characterization of two new strains, including a new genus (Hyaliora molinica n. gen. n. sp.) and a new species (Telonema blandense n. sp.), and the re-isolation of a previously characterized telonemid, Telonema subtile, accompanied by new behavioral observations. We present morphological measurements highlighting differences among the isolates and a phylogenetic tree incorporating their 18S rRNA gene sequences. Furthermore, key aspects of their cell biology and structure are highlighted to provide insights into the evolution of their potential sister groups. Since they are relevant not only phylogenetically but also play a crucial role in food webs with some abundant representatives in aquatic ecosystems, the findings of this study provide further sampling and culturing of Telonemia to increase the knowledge of the hidden diversity and evolution of this mysterious group.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jeu.70050","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145354980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

First Report and Morphological Characterization of the Protozoan Ciliate Chilodonella uncinata (Ciliophora: Chilodonellidae) Infecting Cyprinus carpio From Godavari Basin in Nanded and Parbhani Districts, Maharashtra, India 印度马哈拉斯特拉邦nandi和Parbhani地区Godavari盆地感染鲤鱼的原生动物棘毛纤毛虫（棘毛纤毛虫科）首次报道及其形态特征

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-10-13 DOI: 10.1111/jeu.70046

Sailan Shueai Sailan, Rajesh Achegawe, Ammar Al-Farga, Deshmukh Jayashree Uttammrao

{"title":"First Report and Morphological Characterization of the Protozoan Ciliate Chilodonella uncinata (Ciliophora: Chilodonellidae) Infecting Cyprinus carpio From Godavari Basin in Nanded and Parbhani Districts, Maharashtra, India","authors":"Sailan Shueai Sailan, Rajesh Achegawe, Ammar Al-Farga, Deshmukh Jayashree Uttammrao","doi":"10.1111/jeu.70046","DOIUrl":"10.1111/jeu.70046","url":null,"abstract":"<div>\u0000 \u0000 A comprehensive field investigation was conducted on 300 specimens of common carp (Cyprinus carpio) from the Godavari Basin in Nanded and Parbhani districts between May 2024 and April 2025. The protozoan parasite Chilodonella uncinata was identified in 65 fish, resulting in a prevalence rate of 21.1%. Accurate identification was achieved using morphometric analysis under light microscopy, silver nitrate staining, and scanning electron microscopy (SEM), which revealed detailed ciliary structures confirming the species. Histopathological examination of infected gill and skin tissues showed marked pathological changes, including epithelial hyperplasia, lamellar fusion, and infiltration of inflammatory cells, indicating a potential impact on respiratory efficiency and general fish health. This represents the first confirmed report of C. uncinata infecting C. carpio in this region. The findings emphasize the necessity of routine parasite screening and targeted management strategies in aquaculture. Additionally, the study demonstrated that environmental factors, such as elevated water temperature, increased turbidity, reduced dissolved oxygen, and nutrient enrichment, significantly influence the prevalence of the parasite. These results underscore the importance of integrating environmental monitoring into fish health programs to mitigate the spread of protozoan infections and to support sustainable aquaculture development in freshwater ecosystems.\u0000 </div>","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145280325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Adhaerentella dendrocorona gen. and sp. nov: An Attached Monothalamid Foraminifera From the Abyssal Pacific 来自深海太平洋的一种附着的单壳有孔虫

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-10-10 DOI: 10.1111/jeu.70045

Ashley Burkett, Joshua Anadu, Maria Holzmann, Jan Pawlowski, Robert Brandon Pratt, Anthony Rathburn

{"title":"Adhaerentella dendrocorona gen. and sp. nov: An Attached Monothalamid Foraminifera From the Abyssal Pacific","authors":"Ashley Burkett, Joshua Anadu, Maria Holzmann, Jan Pawlowski, Robert Brandon Pratt, Anthony Rathburn","doi":"10.1111/jeu.70045","DOIUrl":"https://doi.org/10.1111/jeu.70045","url":null,"abstract":"<div>\u0000 \u0000 A new genus and species of a monothalamid foraminifera, Adhaerentella dendrocorona, has been identified through phylogenetic and morphological assessment from the Pacific Ocean abyssal plain at Station M, off California. After at least 1 year of colonization time on the seafloor at 4000 m, 141 specimens belonging to the new species were observed attached to plastic substrate deposited on the bottom as a part of the Seafloor Epibenthic Attachment Cube (SEA3) experiments. Adhaerentella dendrocorona is characterized by agglutinated hemispherical tests connected with dendritic tubes. The delicate phyllosilicate branches collapse when not immersed, but embedding in agar or resin facilitates imaging. MicroCT images reveal compositional differences between the agglutinated base and branching tube structures, consisting of phyllosilicates. Despite sharing some morphological similarities with other attached agglutinated genera, such as Capsammina, Crithionina, and Hemisphaerammina, Adhaerentella dendrocorona is genetically different from the latter genera and branches in the monothalamid Clade M. Adhaerentella dendrocorona has a close relationship with undescribed monothalamids from Antarctica, suggesting the possible global distribution of the genus. This study indicates that monothalamid foraminifera are important components of attached abyssal meiofauna, which have evolved morphologies that are likely adapted for suspension feeding in oligotrophic environments that feature hard substrates.\u0000 </div>","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145248455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Database Release: PPSDB, a Linked Open Data Knowledge Base for Protist–Prokaryote Symbioses 数据库发布：PPSDB，一个原生生物-原核生物共生的链接开放数据知识库

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-10-10 DOI: 10.1111/jeu.70049

Brandon K. B. Seah

{"title":"Database Release: PPSDB, a Linked Open Data Knowledge Base for Protist–Prokaryote Symbioses","authors":"Brandon K. B. Seah","doi":"10.1111/jeu.70049","DOIUrl":"https://doi.org/10.1111/jeu.70049","url":null,"abstract":"As the ecological and evolutionary importance of symbiotic interactions between protists (microbial eukaryotes) and prokaryotes (bacteria and archaea) is better appreciated, keeping an overview of their diversity and the literature becomes a growing and ongoing challenge. Here I present the Protist-Prokaryote Symbiosis Database (PPSDB), comprising 1146 manually curated interaction statements sourced from 443 publications, where biological taxonomy, anatomical localization, and analytical methods applied have been annotated and mapped to external databases and ontologies, such as Wikidata, NCBI Taxonomy, and Gene Ontology. I describe how its data model deals practically with challenges such as incomplete information and inconsistent taxon concepts, which will be applicable to similar projects. Both the model and underlying Wikibase software platform are highly extensible, so new items and properties can easily be added. Unlike a static table or list of citations, PPSDB is a structured knowledge base that enables programmatic access and powerful, integrated semantic queries. The database is available at https://ppsdb.wikibase.cloud/.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jeu.70049","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145248457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Expanding the Family Tropidoatractidae: Characterization of Two New Tropidoatractus Species (Armophorea: Metopida) From South Korea Based on Morphology and Molecular Phylogeny 扩大棘足蛙科：韩国两种棘足蛙新种的形态和分子系统发育特征（Armophorea: Metopida）

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-10-10 DOI: 10.1111/jeu.70048

Nanda Dwi Kristanti, Novia Cahyani, Quoc Dung Nguyen, Mann Kyoon Shin

{"title":"Expanding the Family Tropidoatractidae: Characterization of Two New Tropidoatractus Species (Armophorea: Metopida) From South Korea Based on Morphology and Molecular Phylogeny","authors":"Nanda Dwi Kristanti, Novia Cahyani, Quoc Dung Nguyen, Mann Kyoon Shin","doi":"10.1111/jeu.70048","DOIUrl":"https://doi.org/10.1111/jeu.70048","url":null,"abstract":"While oxygen is essential for metabolic processes, many ciliate species thrive in low-oxygen or even oxygen-free environments. Anaerobic ciliates have adapted to a broad range of such habitats, yet have long remained understudied compared to their aerobic counterparts. In recent years, however, interest in these lineages has grown, including in the family Tropidoatractidae Rotterová et al. 2018 (Order Metopida), which currently comprises of two genera, Tropidoatractus Levander, 1894 and Palmarella Jankowski, 1975, and five described species. This report presents two novel freshwater species of Tropidoatractidae, identified through a combination of morphological analysis and 18S rRNA gene phylogeny. Tropidoatractus songi n. sp. is identified by its arcuate body and 11–13 oblique rows of cortical granules between ciliary rows. Tropidoatractus rostrum n. sp. possesses an elongated, ellipsoidal body; a prominent, dark, beak-like anterior end to the preoral dome brim; a macronucleus that is closely associated with rod-shaped endosymbiotic prokaryotes; and sparse, irregular cortical granules. Both species exhibit a diplostichomonad paroral membrane. Phylogenetic analyses of the 18S rRNA gene confirm their affiliation with Tropidoatractus, revealing previously unrecognized species diversity among anaerobic freshwater ciliates.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jeu.70048","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145272390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Underexplored Microbiota of Testate Amoeba in Southeast Asian Ecosystems: A Systematic Review and Meta-Analysis 东南亚生态系统中未开发的遗存变形虫微生物群：系统综述和meta分析。

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-09-19 DOI: 10.1111/jeu.70047

Christon Jairus M. Racoma, Leila L. Tomacas, Nikki Heherson A. Dagamac, Yonas Isaak Tekle

{"title":"Underexplored Microbiota of Testate Amoeba in Southeast Asian Ecosystems: A Systematic Review and Meta-Analysis","authors":"Christon Jairus M. Racoma, Leila L. Tomacas, Nikki Heherson A. Dagamac, Yonas Isaak Tekle","doi":"10.1111/jeu.70047","DOIUrl":"10.1111/jeu.70047","url":null,"abstract":"<div>\u0000 \u0000 Single-celled protists, such as testate amoebae, have garnered significant attention as potential bioindicators which translate into their recognition of being ecologically sensitive. They are known for their use in ecological and paleoecological studies, yet their diversity and distribution remain poorly documented in blind spot regions of the Paleotropics. This study systematically consolidates all published species records of testate amoebae, evaluates spatial research bias, and assesses regional richness from Southeast Asian countries. A comprehensive literature search was conducted across digital databases and web-based repositories. In total, there are 497 testate amoebae belonging to 70 genera, including infra-specific species from the 46 studies scoped in this review. Species richness curves revealed steep trajectories in under sampled countries, indicating untapped diversity. Despite geographical proximity, the seeming overlap of species per country was limited, pointing toward predominance of species turnover than nested clustering of richness. This disjunct pattern in species composition suggests the influence of potential ecological specialization or, perhaps, a mere result of uneven research effort in the unexplored regions. The research for testate amoebae has been in a progressive state, yet strong emphasis needs addressing species exploration in response to intensified climate change and degradation of habitats as these would mean potential biodiversity loss.\u0000 </div>","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145091888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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