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Seto K, Simmons DR, Quandt CA, Frenken T, Dirks AC, Clemons RA, McKindles KM, McKay RML, James TY. A combined microscopy and single-cell sequencing approach reveals the ecology, morphology, and phylogeny of uncultured lineages of zoosporic fungi. mBio 2023; 14:e0131323. [PMID: 37486265 PMCID: PMC10470594 DOI: 10.1128/mbio.01313-23] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 06/06/2023] [Indexed: 07/25/2023] Open
Abstract
Environmental DNA analyses of fungal communities typically reveal a much larger diversity than can be ascribed to known species. Much of this hidden diversity lies within undescribed fungal lineages, especially the early diverging fungi (EDF). Although these EDF often represent new lineages even at the phylum level, they have never been cultured, making their morphology and ecology uncertain. One of the methods to characterize these uncultured fungi is a single-cell DNA sequencing approach. In this study, we established a large data set of single-cell sequences of EDF by manually isolating and photographing parasitic fungi on various hosts such as algae, protists, and micro-invertebrates, combined with subsequent long-read sequencing of the ribosomal DNA locus (rDNA). We successfully obtained rDNA sequences of 127 parasitic fungal cells, which clustered into 71 phylogenetic lineages belonging to seven phylum-level clades of EDF: Blastocladiomycota, Chytridiomycota, Aphelidiomycota, Rozellomycota, and three unknown phylum-level clades. Most of our single cells yielded novel sequences distinguished from both described taxa and existing metabarcoding data, indicating an expansive and hidden diversity of parasitic taxa of EDF. We also revealed an unexpected diversity of endobiotic Olpidium-like chytrids and hyper-parasitic lineages. Overall, by combining photographs of parasitic fungi with phylogenetic analyses, we were able to better understand the ecological function and morphology of many of the branches on the fungal tree of life known only from DNA sequences. IMPORTANCE Much of the diversity of microbes from natural habitats, such as soil and freshwater, comprise species and lineages that have never been isolated into pure culture. In part, this stems from a bias of culturing in favor of saprotrophic microbes over the myriad symbiotic ones that include parasitic and mutualistic relationships with other taxa. In the present study, we aimed to shed light on the ecological function and morphology of the many undescribed lineages of aquatic fungi by individually isolating and sequencing molecular barcodes from 127 cells of host-associated fungi using single-cell sequencing. By adding these sequences and their photographs into the fungal tree, we were able to understand the morphology of reproductive and vegetative structures of these novel fungi and to provide a hypothesized ecological function for them. These individual host-fungal cells revealed themselves to be complex environments despite their small size; numerous samples were hyper-parasitized with other zoosporic fungal lineages such as Rozellomycota.
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Affiliation(s)
- Kensuke Seto
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, USA
- Faculty of Environment and Information Sciences, Yokohama National University, Yokohama, Kanagawa, Japan
| | - D. Rabern Simmons
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, USA
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, Indiana, USA
| | - C. Alisha Quandt
- Department of Ecology and Evolutionary Biology, University of Colorado Boulder, Boulder, Colorado, USA
| | - Thijs Frenken
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Ontario, Canada
- Cluster Nature and Society, HAS University of Applied Sciences, 's-Hertogenbosch, the Netherlands
| | - Alden C. Dirks
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, USA
| | - Rebecca A. Clemons
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, USA
- Department of Integrative Biology, The University of Texas at Austin, Austin, Texas, USA
| | - Katelyn M. McKindles
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, USA
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Ontario, Canada
| | - R. Michael L. McKay
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Ontario, Canada
- Great Lakes Center for Fresh Waters and Human Health, Bowling Green State University, Bowling Green, Ohio, USA
| | - Timothy Y. James
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, USA
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Hurdeal VG, Longcore JE, Gareth Jones EB, Rabern Simmons D, Hyde KD, Gentekaki E. Integrative approach to species delimitation in Rhizophydiales: Novel species of Angulomyces, Gorgonomyces, and Terramyces from northern Thailand. Mol Phylogenet Evol 2023; 180:107706. [PMID: 36657624 DOI: 10.1016/j.ympev.2023.107706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 12/23/2022] [Accepted: 01/11/2023] [Indexed: 01/19/2023]
Abstract
The Chytridiomycota is a phylum of zoosporic eufungi that inhabit terrestrial, freshwater, and oceanic habitats. Within the phylum, the Rhizophydiales contains several monotypic families theorized to hold a diverse assemblage of fungi yet to be discovered and properly described. Based on morphology alone, many species in this order are difficult or impossible to identify. In this study, we isolated three chytrids from northern Thailand. Phylogenetic analyses placed the isolates in three monotypic genera within Rhizophydiales. Intrageneric genetic distances in the internal transcribed spacer (ITS) ranged between 1.5 and 8.5%. Angulomyces solicola sp. nov. is characterized by larger sporangia, spores, and fewer discharge papilla than A.argentinensis; Gorgonomyces thailandicus sp. nov. has larger zoospores and fewer discharge papillae in culture compared to G. haynaldii; Terramyces chiangraiensis sp. nov. produces larger sporangia than T. subangulosum. We delimited species of Angulomyces, Gorgonomyces and Terramyces using a tripartite approach that employed phylogeny, ITS genetic distances and Poisson tree processes (PTP). Results of these approaches suggest more than one species in each genus. This study contributes to the knowledge of chytrids, an understudied group in Thailand and worldwide.
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Affiliation(s)
- Vedprakash G Hurdeal
- Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand; School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Joyce E Longcore
- School of Biology and Ecology, University of Maine, Orono, ME 04469-5722, USA
| | - E B Gareth Jones
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - D Rabern Simmons
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907, USA
| | - Kevin D Hyde
- Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand; Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, People's Republic of China
| | - Eleni Gentekaki
- Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand; School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand.
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3
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Klawonn I, Dunker S, Kagami M, Grossart HP, Van den Wyngaert S. Intercomparison of Two Fluorescent Dyes to Visualize Parasitic Fungi (Chytridiomycota) on Phytoplankton. MICROBIAL ECOLOGY 2023; 85:9-23. [PMID: 34854932 PMCID: PMC9849195 DOI: 10.1007/s00248-021-01893-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 10/04/2021] [Indexed: 06/13/2023]
Abstract
Fungal microparasites (here chytrids) are widely distributed and yet, they are often overlooked in aquatic environments. To facilitate the detection of microparasites, we revisited the applicability of two fungal cell wall markers, Calcofluor White (CFW) and wheat germ agglutinin (WGA), for the direct visualization of chytrid infections on phytoplankton in laboratory-maintained isolates and field-sampled communities. Using a comprehensive set of chytrid-phytoplankton model pathosystems, we verified the staining pattern on diverse morphological structures of chytrids via fluorescence microscopy. Empty sporangia were stained most effectively, followed by encysted zoospores and im-/mature sporangia, while the staining success was more variable for rhizoids, stalks, and resting spores. In a few instances, the staining was unsuccessful (mostly with WGA), presumably due to insufficient cell fixation, gelatinous cell coatings, and multilayered cell walls. CFW and WGA staining could be done in Utermöhl chambers or on polycarbonate filters, but CFW staining on filters seemed less advisable due to high background fluorescence. To visualize chytrids, 1 µg dye mL-1 was sufficient (but 5 µg mL-1 are recommended). Using a dual CFW-WGA staining protocol, we detected multiple, mostly undescribed chytrids in two natural systems (freshwater and coastal), while falsely positive or negative stained cells were well detectable. As a proof-of-concept, we moreover conducted imaging flow cytometry, as a potential high-throughput technology for quantifying chytrid infections. Our guidelines and recommendations are expected to facilitate the detection of chytrid epidemics and to unveil their ecological and economical imprint in natural and engineered aquatic systems.
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Affiliation(s)
- Isabell Klawonn
- Department of Experimental Limnology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), 12587, Berlin, Germany.
- Leibniz Institute for Baltic Sea Research (IOW), Seestrasse 15, 18119, Rostock, Germany.
| | - Susanne Dunker
- Department for Physiological Diversity, Helmholtz Centre for Environmental Research (UFZ), 04318, Leipzig, Germany
- German Centre for Integrative Biodiversity Research (iDiv), 04103, Leipzig, Germany
| | - Maiko Kagami
- Faculty of Science, Toho University, Funabashi, Chiba, 274-8510, Japan
- Faculty of Environment and Information Sciences, Yokohama National University, Yokohama, Kanagawa, 240-8502, Japan
| | - Hans-Peter Grossart
- Department of Experimental Limnology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), 12587, Berlin, Germany
- Institute of Biochemistry and Biology, Potsdam University, 14476, Potsdam, Germany
| | - Silke Van den Wyngaert
- Department of Experimental Limnology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), 12587, Berlin, Germany.
- WasserCluster Lunz, Biologische Station, Dr. Carl Kupelwieser Promenade 5, 3293, Lunz am See, Austria.
- Department of Biology, University of Turku, Vesilinnantie 5, 20014, Turku, Finland.
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Vasantha Raman N, Gsell AS, Voulgarellis T, van den Brink NW, de Senerpont Domis LN. Moving beyond standard toxicological metrics: The effect of diclofenac on planktonic host-parasite interactions. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 254:106370. [PMID: 36516501 DOI: 10.1016/j.aquatox.2022.106370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 12/01/2022] [Accepted: 12/04/2022] [Indexed: 06/17/2023]
Abstract
Pharmaceuticals are increasingly released into surface waters and therefore ubiquitous in aquatic systems. While pharmaceuticals are known to influence species interactions, their effect on host-parasite interactions is still underexplored despite potential ecosystem-level consequences. Here, we ask whether diclofenac, a widely used non-steroid anti-inflammatory drug, affects the interaction between a phytoplankton host (Staurastrum sp.; green alga) and its obligate fungal parasite (Staurastromyces oculus; chytrid fungus). We hypothesized that the effect of increasing diclofenac concentration on the host-parasite system depends on parasite exposure. We assessed acute and chronic effects of a wide range of diclofenac concentrations (0-150 mg/L) on host and parasite performance using a replicated long gradient design in batch cultures. Overall system response summarizing parameters related to all biotic components in an experimental unit i.e., number of bacteria and phytoplankton host cells along with photosynthetic yield (a measure of algal cell fitness), depended on diclofenac concentration and presence/absence of parasite. While host standing biomass decreased at diclofenac concentrations >10 mg/L in non-parasite-exposed treatments, it increased at ≥10 mg/L in parasite-exposed treatments since losses due to infection declined. During acute phase (0-48 h), diclofenac concentrations <0.1 mg/L had no effect on host net-production neither in parasite-exposed nor non-parasite-exposed treatments, but parasite infection ceased at 10 mg/L. During chronic phase (0-216 h), host net-production declined only at concentrations >10 mg/L in non-parasite-exposed cultures, while it was overall close to zero in parasite-exposed cultures. Our results suggest that chytrid parasites are more sensitive to diclofenac than their host, allowing a window of opportunity for growth of phytoplankton hosts, despite exposure to a parasite. Our work provides a first understanding about effects of a pharmaceutical on a host-parasite interaction beyond those defined by standard toxicological metrics.
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Affiliation(s)
- Nandini Vasantha Raman
- Department of Aquatic Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, Wageningen, PB 6708, the Netherlands.
| | - Alena S Gsell
- Department of Aquatic Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, Wageningen, PB 6708, the Netherlands
| | - Themistoklis Voulgarellis
- Department of Aquatic Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, Wageningen, PB 6708, the Netherlands
| | - Nico W van den Brink
- Division of Toxicology, Wageningen University & Research, Stippeneng 4, Wageningen, WE 6708, the Netherlands
| | - Lisette N de Senerpont Domis
- Department of Aquatic Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, Wageningen, PB 6708, the Netherlands; Aquatic Ecology and Water Quality Management Group, Wageningen University & Research, Wageningen, the Netherlands; Pervasive Systems Research Group, Faculty of Electrical Engineering, Mathematics and Computer Science, University of Twente, the Netherlands; Department of Water Resources, Faculty of Geo-Information Science and Earth Observation, University of Twente, the Netherlands
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Van Den Wyngaert S, Kainz MJ, Ptacnik R. Mucilage protects the planktonic desmid Staurodesmus sp. against parasite attack by a chytrid fungus. JOURNAL OF PLANKTON RESEARCH 2023; 45:3-14. [PMID: 36751484 PMCID: PMC9896892 DOI: 10.1093/plankt/fbac071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 11/23/2022] [Indexed: 06/18/2023]
Abstract
Zoosporic fungi of the phylum Chytridiomycota are ubiquitous parasites of phytoplankton in aquatic ecosystems, but little is known about phytoplankton defense strategies against parasitic chytrid attacks. Using a model chytrid-phytoplankton pathosystem, we experimentally tested the hypothesis that the mucilage envelope of a mucilage-forming desmid species provides protection against the parasitic chytrid Staurastromyces oculus. Mucilage-forming Staurodesmus cells were not accessible to the chytrid, whereas physical removal of the mucilage envelope rendered the same Staurodesmus sp. strain equally susceptible to chytrid infections as the original non-mucilage-forming host Staurastrum sp. Epidemic spread of the parasite only occurred in Staurastrum sp., whereas non-mucilage-bearing Staurodesmus sp. allowed for co-existence of host and parasite, and mucilage-bearing Staurodesmus sp. caused parasite extinction. In addition to the mucilage defense barrier, we also demonstrate the ability of both Staurastrum sp. and Staurodesmus sp. to resist infection by preventing chytrid development while still remaining viable and being able to reproduce and thus recover from an infection. This study extends our knowledge on phytoplankton defense traits and the functional role of mucilage in phytoplankton as a physical barrier against fungal parasites.
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Affiliation(s)
| | - Martin J Kainz
- Wassercluster – Biologische Station Lunz, Dr Carl Kupelwieser Promenade 5, 3293 Lunz Am See, Austria
- Department of Biomedical Research, Danube University, Dr Karl Dorrek Strasse 20, 3500 Krems, Austria
| | - Robert Ptacnik
- Wassercluster – Biologische Station Lunz, Dr Carl Kupelwieser Promenade 5, 3293 Lunz Am See, Austria
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6
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Van den Wyngaert S, Ganzert L, Seto K, Rojas-Jimenez K, Agha R, Berger SA, Woodhouse J, Padisak J, Wurzbacher C, Kagami M, Grossart HP. Seasonality of parasitic and saprotrophic zoosporic fungi: linking sequence data to ecological traits. THE ISME JOURNAL 2022; 16:2242-2254. [PMID: 35764676 PMCID: PMC9381765 DOI: 10.1038/s41396-022-01267-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 05/28/2022] [Accepted: 06/07/2022] [Indexed: 11/10/2022]
Abstract
Zoosporic fungi of the phylum Chytridiomycota (chytrids) regularly dominate pelagic fungal communities in freshwater and marine environments. Their lifestyles range from obligate parasites to saprophytes. Yet, linking the scarce available sequence data to specific ecological traits or their host ranges constitutes currently a major challenge. We combined 28 S rRNA gene amplicon sequencing with targeted isolation and sequencing approaches, along with cross-infection assays and analysis of chytrid infection prevalence to obtain new insights into chytrid diversity, ecology, and seasonal dynamics in a temperate lake. Parasitic phytoplankton-chytrid and saprotrophic pollen-chytrid interactions made up the majority of zoosporic fungal reads. We explicitly demonstrate the recurrent dominance of parasitic chytrids during frequent diatom blooms and saprotrophic chytrids during pollen rains. Distinct temporal dynamics of diatom-specific parasitic clades suggest mechanisms of coexistence based on niche differentiation and competitive strategies. The molecular and ecological information on chytrids generated in this study will aid further exploration of their spatial and temporal distribution patterns worldwide. To fully exploit the power of environmental sequencing for studies on chytrid ecology and evolution, we emphasize the need to intensify current isolation efforts of chytrids and integrate taxonomic and autecological data into long-term studies and experiments.
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Affiliation(s)
- Silke Van den Wyngaert
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Zur alten Fischerhütte 2, 16775, Stechlin, Germany. .,Department of Biology, University of Turku, Vesilinnantie 5, 20014, Turku, Finland.
| | - Lars Ganzert
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Zur alten Fischerhütte 2, 16775, Stechlin, Germany.,GFZ German Research Centre for Geosciences, Section Geomicrobiology, Telegrafenberg, 14473, Potsdam, Germany.,Marbio, UiT- The Arctic University of Norway, Sykehusveien 23, 9019, Tromsø, Norway
| | - Kensuke Seto
- Faculty of Environment and Information Sciences, Yokohama National University, Tokiwadai 79-7, Hodogayaku, Yokohama, Kanagawa, 240-8501, Japan.,Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, 48109, MI, USA
| | | | - Ramsy Agha
- Department of Ecosystem Research, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301, 12587, Berlin, Germany
| | - Stella A Berger
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Zur alten Fischerhütte 2, 16775, Stechlin, Germany
| | - Jason Woodhouse
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Zur alten Fischerhütte 2, 16775, Stechlin, Germany
| | - Judit Padisak
- Research Group of Limnology, Centre of Natural Sciences, University of Pannonia, Egyetem u. 10, 8200, Veszprém, Hungary
| | - Christian Wurzbacher
- Chair of Urban Water Systems Engineering, Technical University of Munich, Am Coulombwall 3, 85748, Garching, Germany
| | - Maiko Kagami
- Faculty of Environment and Information Sciences, Yokohama National University, Tokiwadai 79-7, Hodogayaku, Yokohama, Kanagawa, 240-8501, Japan.
| | - Hans-Peter Grossart
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Zur alten Fischerhütte 2, 16775, Stechlin, Germany. .,Institute of Biochemistry and Biology, Potsdam University, Maulbeerallee 2, 14469, Potsdam, Germany.
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Calabon MS, Hyde KD, Jones EBG, Luo ZL, Dong W, Hurdeal VG, Gentekaki E, Rossi W, Leonardi M, Thiyagaraja V, Lestari AS, Shen HW, Bao DF, Boonyuen N, Zeng M. Freshwater fungal numbers. FUNGAL DIVERS 2022. [DOI: 10.1007/s13225-022-00503-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ilicic D, Woodhouse J, Karsten U, Zimmermann J, Wichard T, Quartino ML, Campana GL, Livenets A, Van den Wyngaert S, Grossart HP. Antarctic Glacial Meltwater Impacts the Diversity of Fungal Parasites Associated With Benthic Diatoms in Shallow Coastal Zones. Front Microbiol 2022; 13:805694. [PMID: 35308360 PMCID: PMC8931407 DOI: 10.3389/fmicb.2022.805694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 01/12/2022] [Indexed: 01/04/2023] Open
Abstract
Aquatic ecosystems are frequently overlooked as fungal habitats, although there is increasing evidence that their diversity and ecological importance are greater than previously considered. Aquatic fungi are critical and abundant components of nutrient cycling and food web dynamics, e.g., exerting top-down control on phytoplankton communities and forming symbioses with many marine microorganisms. However, their relevance for microphytobenthic communities is almost unexplored. In the light of global warming, polar regions face extreme changes in abiotic factors with a severe impact on biodiversity and ecosystem functioning. Therefore, this study aimed to describe, for the first time, fungal diversity in Antarctic benthic habitats along the salinity gradient and to determine the co-occurrence of fungal parasites with their algal hosts, which were dominated by benthic diatoms. Our results reveal that Ascomycota and Chytridiomycota are the most abundant fungal taxa in these habitats. We show that also in Antarctic waters, salinity has a major impact on shaping not just fungal but rather the whole eukaryotic community composition, with a diversity of aquatic fungi increasing as salinity decreases. Moreover, we determined correlations between putative fungal parasites and potential benthic diatom hosts, highlighting the need for further systematic analysis of fungal diversity along with studies on taxonomy and ecological roles of Chytridiomycota.
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Affiliation(s)
- Doris Ilicic
- Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Neuglobsow, Germany
| | - Jason Woodhouse
- Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Neuglobsow, Germany
| | - Ulf Karsten
- Institute of Biological Sciences, Applied Ecology and Phycology, University of Rostock, Rostock, Germany
| | - Jonas Zimmermann
- Botanic Garden and Botanical Museum Berlin-Dahlem, Freie Universität Berlin, Berlin, Germany
| | - Thomas Wichard
- Institute for Inorganic and Analytical Chemistry, Friedrich-Schiller-University Jena, Jena, Germany
| | | | - Gabriela Laura Campana
- Department of Coastal Biology, Argentinean Antarctic Institute, Buenos Aires, Argentina
- Department of Basic Sciences, National University of Luján, Luján, Buenos Aires, Argentina
| | - Alexandra Livenets
- Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Neuglobsow, Germany
| | | | - Hans-Peter Grossart
- Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Neuglobsow, Germany
- Institute of Biochemistry and Biology, University of Potsdam, Potsdam, Germany
- *Correspondence: Hans-Peter Grossart,
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Ilicic D, Grossart HP. Basal Parasitic Fungi in Marine Food Webs-A Mystery Yet to Unravel. J Fungi (Basel) 2022; 8:114. [PMID: 35205868 PMCID: PMC8874645 DOI: 10.3390/jof8020114] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 01/20/2022] [Accepted: 01/25/2022] [Indexed: 02/01/2023] Open
Abstract
Although aquatic and parasitic fungi have been well known for more than 100 years, they have only recently received increased awareness due to their key roles in microbial food webs and biogeochemical cycles. There is growing evidence indicating that fungi inhabit a wide range of marine habitats, from the deep sea all the way to surface waters, and recent advances in molecular tools, in particular metagenome approaches, reveal that their diversity is much greater and their ecological roles more important than previously considered. Parasitism constitutes one of the most widespread ecological interactions in nature, occurring in almost all environments. Despite that, the diversity of fungal parasites, their ecological functions, and, in particular their interactions with other microorganisms remain largely speculative, unexplored and are often missing from current theoretical concepts in marine ecology and biogeochemistry. In this review, we summarize and discuss recent research avenues on parasitic fungi and their ecological potential in marine ecosystems, e.g., the fungal shunt, and emphasize the need for further research.
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Affiliation(s)
- Doris Ilicic
- Leibniz Institute of Freshwater Ecology and Inland Fisheries, Alte Fischerhütte 2, 16775 Stechlin, Germany;
| | - Hans-Peter Grossart
- Leibniz Institute of Freshwater Ecology and Inland Fisheries, Alte Fischerhütte 2, 16775 Stechlin, Germany;
- Institute of Biochemistry and Biology, Potsdam University, Maulbeerallee 2, 14469 Potsdam, Germany
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Early-diverging fungal phyla: taxonomy, species concept, ecology, distribution, anthropogenic impact, and novel phylogenetic proposals. FUNGAL DIVERS 2021; 109:59-98. [PMID: 34608378 PMCID: PMC8480134 DOI: 10.1007/s13225-021-00480-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Accepted: 07/19/2021] [Indexed: 01/02/2023]
Abstract
The increasing number of new fungal species described from all over the world along with the use of genetics to define taxa, has dramatically changed the classification system of early-diverging fungi over the past several decades. The number of phyla established for non-Dikarya fungi has increased from 2 to 17. However, to date, both the classification and phylogeny of the basal fungi are still unresolved. In this article, we review the recent taxonomy of the basal fungi and re-evaluate the relationships among early-diverging lineages of fungal phyla. We also provide information on the ecology and distribution in Mucoromycota and highlight the impact of chytrids on amphibian populations. Species concepts in Chytridiomycota, Aphelidiomycota, Rozellomycota, Neocallimastigomycota are discussed in this paper. To preserve the current application of the genus Nephridiophaga (Chytridiomycota: Nephridiophagales), a new type species, Nephridiophaga blattellae, is proposed.
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Parasitoid chytridiomycete Ericiomyces syringoforeus gen. et sp. nov. has unique cellular structures to infect the host. Mycol Prog 2021. [DOI: 10.1007/s11557-020-01652-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Parasitic Chytrids Upgrade and Convey Primary Produced Carbon During Inedible Algae Proliferation. Protist 2020; 171:125768. [PMID: 33126022 DOI: 10.1016/j.protis.2020.125768] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 09/04/2020] [Accepted: 09/04/2020] [Indexed: 11/20/2022]
Abstract
Microbial parasites have only recently been included in planktonic food web studies, but their functional role in conveying dietary energy still remains to be elucidated. Parasitic fungi (chytrids) infecting phytoplankton may constitute an alternative trophic link and promote organic matter transfer through the production of dissemination zoospores. Particularly, during proliferation of inedible or toxic algal species, such as large Cyanobacteria fostered by global warming, parasites can constitute an alternative trophic link providing essential dietary nutrients that support somatic growth and reproduction of consumers. Using phytoplankton-parasites associations grown under laboratory controlled conditions we assessed the fatty acids and biochemical composition of species with different nutritional quality and followed the metabolic pathway from the algal host and their parasites zoospores using compound-specific stable isotope analysis. This study demonstrated that chytrids are trophic upgraders able to retain essential nutrients that can be transferred to upper trophic levels both in terms of organic matter quantity and nutritional quality. Through the production of zoospores, nutritionally important long-chain polyunsaturated fatty acids that can be consequently assimilated by consumers. We conclude that parasitism at the base of aquatic food webs may represent a crucial trophic link for dietary nutrients and essential biomolecules alternative to herbivory or bacterivory, which can be particularly crucial during the proliferation of inedible or nutritionally inadequate algal species fostered by climate change.
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13
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Abstract
Oman is a desert country in the south of the Middle East. Springs and other water sources that harbor aquatic organisms can be separated by hundreds of kilometers. In Oct 2019, we isolated four freshwater aquatic fungi (Chytridiomycota) from benthic detritus baited with pine pollen on a general nutrient medium near Salalah, Oman. Database queries of nuc 28S rRNA (28S) and internal transcribed spacer region ITS1-5.8S-ITS2 (ITS) revealed that one of these strains was Dinochytrium kinnereticum, a recently described algal pathogen from the Sea of Galilee. The other three strains had low molecular identity to available ITS sequences. These unknown strains varied in size and released endogenously swarming zoospores through papillae from mature zoosporangia. Zoospore ultrastructure was consistent with described species in the Rhizophydiales, and molecular phylogenetic results grouped these three strains into a clade in the genus Rhizophydium. We circumscribe these three strains as a sp. nov., thereby expanding the diversity within Rhizophydium described as the new species R. jobii. In doing so, we provide the first report of Chytridiomycota from Oman.
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Affiliation(s)
- Brandon T Hassett
- UiT-The Arctic University of Norway , Framstredet 6, Tromsø 9019, Norway
| | - Badriya K Al-Shaibi
- Department of Crop Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University , P.O. Box-34, Al-Khod 123, Oman
| | - Abdulrahman Al-Nabhani
- Department of Crop Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University , P.O. Box-34, Al-Khod 123, Oman
| | - Abdullah M Al-Sadi
- Department of Crop Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University , P.O. Box-34, Al-Khod 123, Oman
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14
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Taube R, Fabian J, Van den Wyngaert S, Agha R, Baschien C, Gerphagnon M, Kagami M, Krüger A, Premke K. Potentials and limitations of quantification of fungi in freshwater environments based on PLFA profiles. FUNGAL ECOL 2019. [DOI: 10.1016/j.funeco.2019.05.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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Seto K, Van den Wyngaert S, Degawa Y, Kagami M. Taxonomic revision of the genus Zygorhizidium: Zygorhizidiales and Zygophlyctidales ord. nov. ( Chytridiomycetes, Chytridiomycota). Fungal Syst Evol 2019; 5:17-38. [PMID: 32467913 PMCID: PMC7250019 DOI: 10.3114/fuse.2020.05.02] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
During the last decade, the classification system of chytrids has dramatically changed based on zoospore ultrastructure and molecular phylogeny. In contrast to well-studied saprotrophic chytrids, most parasitic chytrids have thus far been only morphologically described by light microscopy, hence they hold great potential for filling some of the existing gaps in the current classification of chytrids. The genus Zygorhizidium is characterized by an operculate zoosporangium and a resting spore formed as a result of sexual reproduction in which a male thallus and female thallus fuse via a conjugation tube. All described species of Zygorhizidium are parasites of algae and their taxonomic positions remain to be resolved. Here, we examined morphology, zoospore ultrastructure, host specificity, and molecular phylogeny of seven cultures of Zygorhizidium spp. Based on thallus morphology and host specificity, one culture was identified as Z. willei parasitic on zygnematophycean green algae, whereas the others were identified as parasites of diatoms, Z. asterionellae on Asterionella, Z. melosirae on Aulacoseira, and Z. planktonicum on Ulnaria (formerly Synedra). According to phylogenetic analysis, Zygorhizidium was separated into two distinct order-level novel lineages; one lineage was composed singly of Z. willei, which is the type species of the genus, and the other included the three species of diatom parasites. Zoospore ultrastructural observation revealed that the two lineages can be distinguished from each other and both possess unique characters among the known orders within the Chytridiomycetes. Based on these results, we accommodate the three diatom parasites, Z. asterionellae, Z. melosirae, and Z. planktonicum in the distinct genus Zygophlyctis, and propose two new orders: Zygorhizidiales and Zygophlyctidales.
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Affiliation(s)
- K Seto
- Sugadaira Research Station, Mountain Science Center, University of Tsukuba, 1278-294, Sugadaira-Kogen, Ueda, Nagano 386-2204, Japan.,Department of Environmental Science, Faculty of Science, Toho University, 2-2-1, Miyama, Funabashi, Chiba 274-8510, Japan.,Graduate School of Environment and Information Sciences, Yokohama National University, 79-7, Tokiwadai, Hodogaya, Yokohama, Kanagawa 240-8502, Japan
| | - S Van den Wyngaert
- Department of Experimental Limnology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Alte Fischerhuette 2, D-16775 Stechlin, Germany
| | - Y Degawa
- Sugadaira Research Station, Mountain Science Center, University of Tsukuba, 1278-294, Sugadaira-Kogen, Ueda, Nagano 386-2204, Japan
| | - M Kagami
- Department of Environmental Science, Faculty of Science, Toho University, 2-2-1, Miyama, Funabashi, Chiba 274-8510, Japan.,Graduate School of Environment and Information Sciences, Yokohama National University, 79-7, Tokiwadai, Hodogaya, Yokohama, Kanagawa 240-8502, Japan
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16
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Fungal diversity notes 1036–1150: taxonomic and phylogenetic contributions on genera and species of fungal taxa. FUNGAL DIVERS 2019. [DOI: 10.1007/s13225-019-00429-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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17
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Garvetto A, Badis Y, Perrineau MM, Rad-Menéndez C, Bresnan E, Gachon CM. Chytrid infecting the bloom-forming marine diatom Skeletonema sp.: Morphology, phylogeny and distribution of a novel species within the Rhizophydiales. Fungal Biol 2019; 123:471-480. [DOI: 10.1016/j.funbio.2019.04.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 04/01/2019] [Accepted: 04/10/2019] [Indexed: 10/27/2022]
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18
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Rediscovering Zygorhizidium affluens Canter: Molecular Taxonomy, Infectious Cycle, and Cryopreservation of a Chytrid Infecting the Bloom-Forming Diatom Asterionella formosa. Appl Environ Microbiol 2018; 84:AEM.01826-18. [PMID: 30266725 DOI: 10.1128/aem.01826-18] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 09/20/2018] [Indexed: 11/20/2022] Open
Abstract
Parasitic Chytridiomycota (chytrids) are ecologically significant in various aquatic ecosystems, notably through their roles in controlling bloom-forming phytoplankton populations and in facilitating the transfer of nutrients from inedible algae to higher trophic levels. The diversity and study of these obligate parasites, while critical to understand the interactions between pathogens and their hosts in the environment, have been hindered by challenges inherent to their isolation and stable long-term maintenance under laboratory conditions. Here, we isolated an obligate chytrid parasite (CCAP 4086/1) on the freshwater bloom-forming diatom Asterionella formosa and characterized its infectious cycle under controlled conditions. Phylogenetic analyses based on 18S, 5.8S, and 28S ribosomal DNAs (rDNAs) revealed that this strain belongs to the recently described clade SW-I within the Lobulomycetales. All morphological features observed agree with the description of the known Asterionella parasite Zygorhizidium affluens Canter. We thus provide a phylogenetic placement for this chytrid and present a robust and simple assay that assesses both the infection success and the viability of the host. We also validate a cryopreservation method for stable and cost-effective long-term storage and demonstrate its recovery after thawing. All the above-mentioned tools establish a new gold standard for the isolation and long-term preservation of parasitic aquatic chytrids, thus opening new perspectives to investigate the diversity of these organisms and their physiology in a controlled laboratory environment.IMPORTANCE Despite their ecological relevance, parasitic aquatic chytrids are understudied, especially due to the challenges associated with their isolation and maintenance in culture. Here we isolated and established a culture of a chytrid parasite infecting the bloom-forming freshwater diatom Asterionella formosa The chytrid morphology suggests that it corresponds to the Asterionella parasite known as Zygorhizidium affluens The phylogenetic reconstruction in the present study supports the hypothesis that our Z. affluens isolate belongs to the order Lobulomycetales and clusters within the novel clade SW-I. We also validate a cryopreservation method for stable and cost-effective long-term storage of parasitic chytrids of phytoplankton. The establishment of a monoclonal pathosystem in culture and its successful cryopreservation opens the way to further investigate this ecologically relevant parasitic interaction.
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19
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Wijayawardene NN, Pawłowska J, Letcher PM, Kirk PM, Humber RA, Schüßler A, Wrzosek M, Muszewska A, Okrasińska A, Istel Ł, Gęsiorska A, Mungai P, Lateef AA, Rajeshkumar KC, Singh RV, Radek R, Walther G, Wagner L, Walker C, Wijesundara DSA, Papizadeh M, Dolatabadi S, Shenoy BD, Tokarev YS, Lumyong S, Hyde KD. Notes for genera: basal clades of Fungi (including Aphelidiomycota, Basidiobolomycota, Blastocladiomycota, Calcarisporiellomycota, Caulochytriomycota, Chytridiomycota, Entomophthoromycota, Glomeromycota, Kickxellomycota, Monoblepharomycota, Mortierellomycota, Mucoromycota, Neocallimastigomycota, Olpidiomycota, Rozellomycota and Zoopagomycota). FUNGAL DIVERS 2018. [DOI: 10.1007/s13225-018-0409-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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20
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Seto K, Degawa Y. Collimyces mutans gen. et sp. nov. (Rhizophydiales, Collimycetaceae fam. nov.), a New Chytrid Parasite of Microglena (Volvocales, clade Monadinia). Protist 2018; 169:507-520. [DOI: 10.1016/j.protis.2018.02.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 01/31/2018] [Accepted: 02/26/2018] [Indexed: 12/22/2022]
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21
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Van den Wyngaert S, Rojas-Jimenez K, Seto K, Kagami M, Grossart HP. Diversity and Hidden Host Specificity of Chytrids Infecting Colonial Volvocacean Algae. J Eukaryot Microbiol 2018; 65:870-881. [PMID: 29752884 DOI: 10.1111/jeu.12632] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 04/27/2018] [Accepted: 05/02/2018] [Indexed: 01/18/2023]
Abstract
Chytrids are zoosporic fungi that play an important, but yet understudied, ecological role in aquatic ecosystems. Many chytrid species have been morphologically described as parasites on phytoplankton. However, the majority of them have rarely been isolated and lack DNA sequence data. In this study we isolated and cultivated three parasitic chytrids, infecting a common volvocacean host species, Yamagishiella unicocca. To identify the chytrids, we characterized morphology and life cycle, and analyzed phylogenetic relationships based on 18S and 28S rDNA genes. Host range and specificity of the chytrids was determined by cross-infection assays with host strains, characterized by rbcL and ITS markers. We were able to confirm the identity of two chytrid strains as Endocoenobium eudorinae Ingold and Dangeardia mamillata Schröder and described the third chytrid strain as Algomyces stechlinensis gen. et sp. nov. The three chytrids were assigned to novel and phylogenetically distant clades within the phylum Chytridiomycota, each exhibiting different host specificities. By integrating morphological and molecular data of both the parasitic chytrids and their respective host species, we unveiled cryptic host-parasite associations. This study highlights that a high prevalence of (pseudo)cryptic diversity requires molecular characterization of both phytoplankton host and parasitic chytrid to accurately identify and compare host range and specificity, and to study phytoplankton-chytrid interactions in general.
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Affiliation(s)
- Silke Van den Wyngaert
- Department of Experimental Limnology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Alte Fischerhuette 2, D-16775, Stechlin, Germany
| | - Keilor Rojas-Jimenez
- Department of Experimental Limnology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Alte Fischerhuette 2, D-16775, Stechlin, Germany.,Universidad Latina de Costa Rica, Campus San Pedro, Apdo, 10138-1000, San Jose, Costa Rica
| | - Kensuke Seto
- Department of Environmental Sciences, Faculty of Science, Toho University, Funabashi, Chiba, Japan
| | - Maiko Kagami
- Department of Environmental Sciences, Faculty of Science, Toho University, Funabashi, Chiba, Japan
| | - Hans-Peter Grossart
- Department of Experimental Limnology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Alte Fischerhuette 2, D-16775, Stechlin, Germany.,Institute of Biochemistry and Biology, Potsdam University, Maulbeerallee 2, 14476, Potsdam, Germany
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22
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Hassett BT, Gradinger R. New Species of Saprobic Labyrinthulea (=Labyrinthulomycota) and the Erection of a gen. nov. to Resolve Molecular Polyphyly within the Aplanochytrids. J Eukaryot Microbiol 2018; 65:475-483. [PMID: 29265676 DOI: 10.1111/jeu.12494] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 11/29/2017] [Accepted: 12/06/2017] [Indexed: 10/18/2022]
Abstract
A culture of a unicellular heterotrophic eukaryote was established from pollen-baited seawater acquired from the nearshore environment in Tromsø, Norway. Light microscopy revealed the production of ectoplasmic nets and reproduction by biflagellated zoospores, as well as binary division. After culturing and subsequent nucleotide extraction, database queries of the isolate's 18S small ribosomal subunit coding region identified closest molecular affinity to Aplanochytrium haliotidis, a pathogen of abalone. Testing of phylogenetic hypotheses consistently grouped our unknown isolate and A. haliotidis among the homoplasious thraustochytrids. Transmission electron microscopy revealed complex cell walls comprised of electron-dense lamella that formed protuberances, some associated with bothrosomes. Co-culturing experiments with the marine fungus Penicillium brevicompactum revealed prolonged interactions with hyphal strands. Based on the combined information acquired from electron microscopy, life history information, and phylogenetic testing, we describe our unknown isolate as a novel species. To resolve molecular polyphyly within the aplanochytrids, we erect a gen. nov. that circumscribes our novel isolate and the former A. haliotidis within the thraustochytrids.
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Affiliation(s)
- Brandon T Hassett
- UiT Norges Arktiske Universtiet, BFE, NFH Bygget, Framstredet 6, Tromsø, 9019, Norway
| | - Rolf Gradinger
- UiT Norges Arktiske Universtiet, BFE, NFH Bygget, Framstredet 6, Tromsø, 9019, Norway
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23
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Frenken T, Alacid E, Berger SA, Bourne EC, Gerphagnon M, Grossart HP, Gsell AS, Ibelings BW, Kagami M, Küpper FC, Letcher PM, Loyau A, Miki T, Nejstgaard JC, Rasconi S, Reñé A, Rohrlack T, Rojas-Jimenez K, Schmeller DS, Scholz B, Seto K, Sime-Ngando T, Sukenik A, Van de Waal DB, Van den Wyngaert S, Van Donk E, Wolinska J, Wurzbacher C, Agha R. Integrating chytrid fungal parasites into plankton ecology: research gaps and needs. Environ Microbiol 2017; 19:3802-3822. [DOI: 10.1111/1462-2920.13827] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 06/09/2017] [Accepted: 06/10/2017] [Indexed: 01/19/2023]
Affiliation(s)
- Thijs Frenken
- Department of Aquatic Ecology; Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10; Wageningen PB 6708 The Netherlands
| | - Elisabet Alacid
- Departament de Biologia Marina i Oceanografia; Institut de Ciències del Mar (CSIC), Pg. Marítim de la Barceloneta, 37-49; Barcelona 08003 Spain
| | - Stella A. Berger
- Department of Experimental Limnology; Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Alte Fischerhuette 2; Stechlin D-16775 Germany
| | - Elizabeth C. Bourne
- Berlin Center for Genomics in Biodiversity Research, Königin-Luise-Straβe 6-8; Berlin D-14195 Germany
- Department of Ecosystem Research; Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301; Berlin 12587 Germany
| | - Mélanie Gerphagnon
- Department of Ecosystem Research; Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301; Berlin 12587 Germany
| | - Hans-Peter Grossart
- Department of Experimental Limnology; Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Alte Fischerhuette 2; Stechlin D-16775 Germany
- Institute for Biochemistry and Biology, Potsdam University, Maulbeerallee 2; Potsdam D-14476 Germany
| | - Alena S. Gsell
- Department of Aquatic Ecology; Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10; Wageningen PB 6708 The Netherlands
| | - Bas W. Ibelings
- Department F.-A. Forel for Environmental and Aquatic Sciences & Institute for Environmental Sciences; University of Geneva, 66 Boulevard Carl Vogt; Geneva 4 CH 1211 Switzerland
| | - Maiko Kagami
- Department of Environmental Sciences, Faculty of Science; Toho University, 2-2-1, Miyama; Funabashi Chiba 274-8510 Japan
| | - Frithjof C. Küpper
- Oceanlab, University of Aberdeen, Main Street; Newburgh Scotland AB41 6AA UK
| | - Peter M. Letcher
- Department of Biological Sciences; The University of Alabama, 300 Hackberry Lane; Tuscaloosa AL 35487 USA
| | - Adeline Loyau
- Department of System Ecotoxicology; Helmholtz Center for Environmental Research - UFZ, Permoserstrasse 15; 04318 Leipzig Germany
- Department of Conservation Biology; Helmholtz Center for Environmental Research - UFZ, Permoserstrasse 15; Leipzig 04318 Germany
- ECOLAB, Université de Toulouse, CNRS, INPT, UPS; Toulouse France
| | - Takeshi Miki
- Institute of Oceanography; National Taiwan University, No.1 Section 4, Roosevelt Road; Taipei 10617 Taiwan
- Research Center for Environmental Changes; Academia Sinica, No.128 Section 2, Academia Road, Nankang; Taipei 11529 Taiwan
| | - Jens C. Nejstgaard
- Department of Experimental Limnology; Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Alte Fischerhuette 2; Stechlin D-16775 Germany
| | - Serena Rasconi
- WasserCluster Lunz - Biological Station; Inter-University Centre for Aquatic Ecosystem Research, A-3293 Lunz am See; Austria
| | - Albert Reñé
- Departament de Biologia Marina i Oceanografia; Institut de Ciències del Mar (CSIC), Pg. Marítim de la Barceloneta, 37-49; Barcelona 08003 Spain
| | - Thomas Rohrlack
- Faculty of Environmental Sciences and Natural Resource Management; Norwegian University of Life Sciences, P.O. Box 5003, NO-1432, Ås; Norway
| | - Keilor Rojas-Jimenez
- Department of Experimental Limnology; Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Alte Fischerhuette 2; Stechlin D-16775 Germany
- Universidad Latina de Costa Rica, Campus San Pedro, Apdo; San Jose 10138-1000 Costa Rica
| | - Dirk S. Schmeller
- Department of Conservation Biology; Helmholtz Center for Environmental Research - UFZ, Permoserstrasse 15; Leipzig 04318 Germany
- ECOLAB, Université de Toulouse, CNRS, INPT, UPS; Toulouse France
| | - Bettina Scholz
- BioPol ehf, Einbúastig 2, Skagaströnd 545; Iceland
- Faculty of Natural Resource Sciences; University of Akureyri, Borgir v. Nordurslod; Akureyri IS 600 Iceland
| | - Kensuke Seto
- Department of Environmental Sciences, Faculty of Science; Toho University, 2-2-1, Miyama; Funabashi Chiba 274-8510 Japan
- Sugadaira Montane Research Center; University of Tsukuba, 1278-294, Sugadaira-Kogen; Ueda, Nagano, 386-2204 Japan
| | - Télesphore Sime-Ngando
- Université Clermont Auvergne, UMR CNRS 6023 LMGE, Laboratoire Microorganismes: Génome et Environnement (LMGE); Campus Universitaire des Cézeaux, Impasse Amélie Murat 1, CS 60026, Aubière, 63178 France
| | - Assaf Sukenik
- Kinneret Limnological Laboratory; Israel Oceanographic & Limnological Research, P.O.Box 447; Migdal, 14950 Israel
| | - Dedmer B. Van de Waal
- Department of Aquatic Ecology; Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10; Wageningen PB 6708 The Netherlands
| | - Silke Van den Wyngaert
- Department of Experimental Limnology; Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Alte Fischerhuette 2; Stechlin D-16775 Germany
| | - Ellen Van Donk
- Department of Aquatic Ecology; Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10; Wageningen PB 6708 The Netherlands
- Department of Biology; University of Utrecht, Padualaan 8; Utrecht TB 3508 The Netherlands
| | - Justyna Wolinska
- Department of Ecosystem Research; Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301; Berlin 12587 Germany
- Institute of Biology, Freie Universität Berlin, Königin-Luise-Straβe 1-3; Berlin, 14195 Germany
| | - Christian Wurzbacher
- Department of Biological and Environmental Sciences; University of Gothenburg, Box 461; Göteborg, 405 30 Sweden
- Gothenburg Global Biodiversity Centre, Box 461; Göteborg, SE-405 30 Sweden
| | - Ramsy Agha
- Department of Ecosystem Research; Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301; Berlin 12587 Germany
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