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Popova OV, Belevich TA, Golyshev SA, Kireev II, Aleoshin VV. Labyrinthula diatomea n. sp.-A Labyrinthulid Associated with Marine Diatoms. J Eukaryot Microbiol 2020; 67:393-402. [PMID: 32003917 DOI: 10.1111/jeu.12789] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 12/19/2019] [Accepted: 01/19/2020] [Indexed: 01/08/2023]
Abstract
Labyrinthulomycetes are mostly fungus-like heterotrophic protists that absorb nutrients in an osmotrophic or phagotrophic manner. Members of order Labyrinthulida produce unique membrane-bound ectoplasmic networks for movement and feeding. Among the various types of labyrinthulids' food substrates, diatoms play an important role due to their ubiquitous distribution and abundant biomass. We isolated and cultivated new diatom consuming Labyrinthulida strains from shallow coastal marine sediments. We described Labyrinthula diatomea n. sp. that differs from all known labyrinthulids in both molecular and morphological features. We provided strain delimitation within the genus Labyrinthula based on ITS sequences via haplotype network construction and compared it with previous phylogenetic surveys.
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Affiliation(s)
- Olga V Popova
- Belozersky Institute for Physico-Chemical Biology, Lomonosov Moscow State University, Leninskye Gory, 1, build. 40, 119991, Moscow, Russian Federation
| | - Tatyana A Belevich
- Belozersky Institute for Physico-Chemical Biology, Lomonosov Moscow State University, Leninskye Gory, 1, build. 40, 119991, Moscow, Russian Federation.,Faculty of Biology, Lomonosov Moscow State University, Leninskye Gory, 1, build. 12, 119991, Moscow, Russian Federation
| | - Sergey A Golyshev
- Belozersky Institute for Physico-Chemical Biology, Lomonosov Moscow State University, Leninskye Gory, 1, build. 40, 119991, Moscow, Russian Federation
| | - Igor I Kireev
- Belozersky Institute for Physico-Chemical Biology, Lomonosov Moscow State University, Leninskye Gory, 1, build. 40, 119991, Moscow, Russian Federation.,Faculty of Biology, Lomonosov Moscow State University, Leninskye Gory, 1, build. 12, 119991, Moscow, Russian Federation.,V.I. Kulakov National Medical Research Center for Obstetrics, Gynecology, and Perinatology, Oparina street, 4, 117997, Moscow, Russian Federation
| | - Vladimir V Aleoshin
- Belozersky Institute for Physico-Chemical Biology, Lomonosov Moscow State University, Leninskye Gory, 1, build. 40, 119991, Moscow, Russian Federation.,Kharkevich Institute for Information Transmission Problems, Russian Academy of Sciences, Bolshoy Karetny per. 19, build. 1, 127051, Moscow, Russian Federation
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Pagenkopp Lohan KM, DiMaria R, Martin DL, Ross C, Ruiz GM. Diversity and microhabitat associations of Labyrinthula spp. in the Indian River Lagoon System. DISEASES OF AQUATIC ORGANISMS 2020; 137:145-157. [PMID: 31942860 DOI: 10.3354/dao03431] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Seagrasses create foundational habitats in coastal ecosystems. One contributing factor to their global decline is disease, primarily caused by parasites in the genus Labyrinthula. To explore the relationship between seagrass and Labyrinthula spp. diversity in coastal waters, we examined the diversity and microhabitat association of Labyrinthula spp. in 2 inlets on Florida's Atlantic Coast, the Indian River Lagoon (IRL) and Banana River. We used amplicon-based high throughput sequencing with 2 newly designed primers to amplify Labyrinthula spp. from 5 seagrass species, water, and sediments to determine their spatial distribution and microhabitat associations. The SSU primer set identified 12 Labyrinthula zero-radius operational taxonomic units (ZOTUs), corresponding to at least 8 putative species. The ITS1 primer set identified 2 ZOTUs, corresponding to at least 2 putative species. Based on our phylogenetic analyses, which include sequences from previous studies that assigned seagrass-related pathogenicity to Labyrinthula clades, all but one of the ZOTUs that we recovered with the SSU primers were from non-pathogenic species, while the 2 ZOTUs recovered with the ITS1 primers were from pathogenic species. Some of the ZOTUs were widespread across the sampling sites and microhabitats (e.g. SSU ZOTU_10), and most were present in more than one site. Our results demonstrate that targeted metabarcoding is a useful tool for examining the relationships between seagrass and Labyrinthula diversity in coastal waters.
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Wang Q, Ye H, Xie Y, He Y, Sen B, Wang G. Culturable Diversity and Lipid Production Profile of Labyrinthulomycete Protists Isolated from Coastal Mangrove Habitats of China. Mar Drugs 2019; 17:md17050268. [PMID: 31064054 PMCID: PMC6562557 DOI: 10.3390/md17050268] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 04/27/2019] [Accepted: 05/02/2019] [Indexed: 11/18/2022] Open
Abstract
Labyrinthulomycete protists have gained significant attention in the recent past for their biotechnological importance. Yet, their lipid profiles are poorly described because only a few large-scale isolation attempts have been made so far. Here, we isolated more than 200 strains from mangrove habitats of China and characterized the molecular phylogeny and lipid accumulation potential of 71 strains. These strains were the closest relatives of six genera namely Aurantiochytrium, Botryochytrium, Parietichytrium, Schizochytrium, Thraustochytrium, and Labyrinthula. Docosahexaenoic acid (DHA) production of the top 15 strains ranged from 0.23 g/L to 1.14 g/L. Two labyrinthulid strains, GXBH-107 and GXBH-215, exhibited unprecedented high DHA production potential with content >10% of biomass. Among all strains, ZJWZ-7, identified as an Aurantiochytrium strain, exhibited the highest DHA production. Further optimization of culture conditions for strain ZJWZ-7 showed improved lipid production (1.66 g/L DHA and 1.68 g/L saturated fatty acids (SFAs)) with glycerol-malic-acid, peptone-yeast-extract, initial pH 7, 28 °C, and rotation rate 150 rpm. Besides, nitrogen source, initial pH, temperature, and rotation rate had significant effects on the cell biomass, DHA, and SFAs production. This study provides the identification and characterization of nearly six dozen thraustochytrids and labyrinthulids with high potential for lipid accumulation.
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Affiliation(s)
- Qiuzhen Wang
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
- Ocean College of Hebei Agricultural University, Qinhuangdao 066000, China.
| | - Huike Ye
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
| | - Yunxuan Xie
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
| | - Yaodong He
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
| | - Biswarup Sen
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
| | - Guangyi Wang
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
- Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China.
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5
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Schwelm A, Badstöber J, Bulman S, Desoignies N, Etemadi M, Falloon RE, Gachon CMM, Legreve A, Lukeš J, Merz U, Nenarokova A, Strittmatter M, Sullivan BK, Neuhauser S. Not in your usual Top 10: protists that infect plants and algae. MOLECULAR PLANT PATHOLOGY 2018; 19:1029-1044. [PMID: 29024322 PMCID: PMC5772912 DOI: 10.1111/mpp.12580] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Revised: 07/06/2017] [Accepted: 07/07/2017] [Indexed: 05/09/2023]
Abstract
Fungi, nematodes and oomycetes belong to the most prominent eukaryotic plant pathogenic organisms. Unicellular organisms from other eukaryotic lineages, commonly addressed as protists, also infect plants. This review provides an introduction to plant pathogenic protists, including algae infecting oomycetes, and their current state of research.
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Affiliation(s)
- Arne Schwelm
- Department of Plant Biology, Uppsala BioCentre, Linnean Centre for Plant BiologySwedish University of Agricultural SciencesUppsala SE‐75007Sweden
- Institute of Microbiology, University of InnsbruckInnsbruck 6020Austria
| | - Julia Badstöber
- Institute of Microbiology, University of InnsbruckInnsbruck 6020Austria
| | - Simon Bulman
- New Zealand Institute for Plant and Food Research LtdLincoln 7608New Zealand
| | - Nicolas Desoignies
- Applied Plant Ecophysiology, Haute Ecole Provinciale de Hainaut‐CondorcetAth 7800Belgium
| | - Mohammad Etemadi
- Institute of Microbiology, University of InnsbruckInnsbruck 6020Austria
| | - Richard E. Falloon
- New Zealand Institute for Plant and Food Research LtdLincoln 7608New Zealand
| | - Claire M. M. Gachon
- The Scottish Association for Marine ScienceScottish Marine InstituteOban PA37 1QAUK
| | - Anne Legreve
- Université catholique de Louvain, Earth and Life InstituteLouvain‐la‐Neuve 1348Belgium
| | - Julius Lukeš
- Institute of Parasitology, Biology Centre37005 České Budějovice (Budweis)Czech Republic
- Faculty of SciencesUniversity of South Bohemia37005 České Budějovice (Budweis)Czech Republic
- Integrated Microbial Biodiversity, Canadian Institute for Advanced ResearchTorontoOntario M5G 1Z8Canada
| | - Ueli Merz
- Plant PathologyInstitute of Integrative Biology, ETH Zurich, Zurich 8092Switzerland
| | - Anna Nenarokova
- Institute of Parasitology, Biology Centre37005 České Budějovice (Budweis)Czech Republic
- Faculty of SciencesUniversity of South Bohemia37005 České Budějovice (Budweis)Czech Republic
| | - Martina Strittmatter
- The Scottish Association for Marine ScienceScottish Marine InstituteOban PA37 1QAUK
- Present address:
Station Biologique de Roscoff, CNRS – UPMC, UMR7144 Adaptation and Diversity in the Marine Environment, Place Georges Teissier, CS 90074, 29688 Roscoff CedexFrance
| | - Brooke K. Sullivan
- School of BiosciencesUniversity of Melbourne, Parkville, Vic. 3010Australia
- School of BiosciencesVictorian Marine Science ConsortiumQueenscliffVic. 3225Australia
| | - Sigrid Neuhauser
- Institute of Microbiology, University of InnsbruckInnsbruck 6020Austria
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