Academic CV: Alexey V. Smirnov ______
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A Revised Classification of Naked Lobose Amoebae (Amoebozoa
Protist, Vol. 162, 545–570, October 2011 http://www.elsevier.de/protis Published online date 28 July 2011 PROTIST NEWS A Revised Classification of Naked Lobose Amoebae (Amoebozoa: Lobosa) Introduction together constitute the amoebozoan subphy- lum Lobosa, which never have cilia or flagella, Molecular evidence and an associated reevaluation whereas Variosea (as here revised) together with of morphology have recently considerably revised Mycetozoa and Archamoebea are now grouped our views on relationships among the higher-level as the subphylum Conosa, whose constituent groups of amoebae. First of all, establishing the lineages either have cilia or flagella or have lost phylum Amoebozoa grouped all lobose amoe- them secondarily (Cavalier-Smith 1998, 2009). boid protists, whether naked or testate, aerobic Figure 1 is a schematic tree showing amoebozoan or anaerobic, with the Mycetozoa and Archamoe- relationships deduced from both morphology and bea (Cavalier-Smith 1998), and separated them DNA sequences. from both the heterolobosean amoebae (Page and The first attempt to construct a congruent molec- Blanton 1985), now belonging in the phylum Per- ular and morphological system of Amoebozoa by colozoa - Cavalier-Smith and Nikolaev (2008), and Cavalier-Smith et al. (2004) was limited by the the filose amoebae that belong in other phyla lack of molecular data for many amoeboid taxa, (notably Cercozoa: Bass et al. 2009a; Howe et al. which were therefore classified solely on morpho- 2011). logical evidence. Smirnov et al. (2005) suggested The phylum Amoebozoa consists of naked and another system for naked lobose amoebae only; testate lobose amoebae (e.g. Amoeba, Vannella, this left taxa with no molecular data incertae sedis, Hartmannella, Acanthamoeba, Arcella, Difflugia), which limited its utility. -
Protistology an International Journal Vol
Protistology An International Journal Vol. 10, Number 2, 2016 ___________________________________________________________________________________ CONTENTS INTERNATIONAL SCIENTIFIC FORUM «PROTIST–2016» Yuri Mazei (Vice-Chairman) Welcome Address 2 Organizing Committee 3 Organizers and Sponsors 4 Abstracts 5 Author Index 94 Forum “PROTIST-2016” June 6–10, 2016 Moscow, Russia Website: http://onlinereg.ru/protist-2016 WELCOME ADDRESS Dear colleagues! Republic) entitled “Diplonemids – new kids on the block”. The third lecture will be given by Alexey The Forum “PROTIST–2016” aims at gathering Smirnov (Saint Petersburg State University, Russia): the researchers in all protistological fields, from “Phylogeny, diversity, and evolution of Amoebozoa: molecular biology to ecology, to stimulate cross- new findings and new problems”. Then Sandra disciplinary interactions and establish long-term Baldauf (Uppsala University, Sweden) will make a international scientific cooperation. The conference plenary presentation “The search for the eukaryote will cover a wide range of fundamental and applied root, now you see it now you don’t”, and the fifth topics in Protistology, with the major focus on plenary lecture “Protist-based methods for assessing evolution and phylogeny, taxonomy, systematics and marine water quality” will be made by Alan Warren DNA barcoding, genomics and molecular biology, (Natural History Museum, United Kingdom). cell biology, organismal biology, parasitology, diversity and biogeography, ecology of soil and There will be two symposia sponsored by ISoP: aquatic protists, bioindicators and palaeoecology. “Integrative co-evolution between mitochondria and their hosts” organized by Sergio A. Muñoz- The Forum is organized jointly by the International Gómez, Claudio H. Slamovits, and Andrew J. Society of Protistologists (ISoP), International Roger, and “Protists of Marine Sediments” orga- Society for Evolutionary Protistology (ISEP), nized by Jun Gong and Virginia Edgcomb. -
The Revised Classification of Eukaryotes
See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/231610049 The Revised Classification of Eukaryotes Article in Journal of Eukaryotic Microbiology · September 2012 DOI: 10.1111/j.1550-7408.2012.00644.x · Source: PubMed CITATIONS READS 961 2,825 25 authors, including: Sina M Adl Alastair Simpson University of Saskatchewan Dalhousie University 118 PUBLICATIONS 8,522 CITATIONS 264 PUBLICATIONS 10,739 CITATIONS SEE PROFILE SEE PROFILE Christopher E Lane David Bass University of Rhode Island Natural History Museum, London 82 PUBLICATIONS 6,233 CITATIONS 464 PUBLICATIONS 7,765 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: Biodiversity and ecology of soil taste amoeba View project Predator control of diversity View project All content following this page was uploaded by Smirnov Alexey on 25 October 2017. The user has requested enhancement of the downloaded file. The Journal of Published by the International Society of Eukaryotic Microbiology Protistologists J. Eukaryot. Microbiol., 59(5), 2012 pp. 429–493 © 2012 The Author(s) Journal of Eukaryotic Microbiology © 2012 International Society of Protistologists DOI: 10.1111/j.1550-7408.2012.00644.x The Revised Classification of Eukaryotes SINA M. ADL,a,b ALASTAIR G. B. SIMPSON,b CHRISTOPHER E. LANE,c JULIUS LUKESˇ,d DAVID BASS,e SAMUEL S. BOWSER,f MATTHEW W. BROWN,g FABIEN BURKI,h MICAH DUNTHORN,i VLADIMIR HAMPL,j AARON HEISS,b MONA HOPPENRATH,k ENRIQUE LARA,l LINE LE GALL,m DENIS H. LYNN,n,1 HILARY MCMANUS,o EDWARD A. D. -
The Microbial Food Web of the Coastal Southern Baltic Sea As Influenced by Wind-Induced Sediment Resuspension
THE MICROBIAL FOOD WEB OF THE COASTAL SOUTHERN BALTIC SEA AS INFLUENCED BY WIND-INDUCED SEDIMENT RESUSPENSION I n a u g u r a l - D i s s e r t a t i o n zur Erlangung des Doktorgrades der Mathematisch-Naturwissenschaftlichen Fakultät der Universität zu Köln vorgelegt von TOBIAS GARSTECKI aus Magdeburg Köln, 2001 Berichterstatter: Prof. Dr. STEPHEN A. WICKHAM Prof. Dr. HARTMUT ARNDT Tag der letzten mündlichen Prüfung: 29.06.2001 Inhaltsverzeichnis Angabe von verwendeten Fremddaten .............................................. 5 Abkürzungsverzeichnis ..................................................................... 6 1. Einleitung ........................................................................................................ 7 1.1. Begründung der Fragestellung ......................................................... 7 1.2. Herangehensweise ..................................................................... 11 2. A comparison of benthic and planktonic heterotrophic protistan community structure in shallow inlets of the Southern Baltic Sea ........… 13 2.1. Summary ................... ........................................................................ 13 2.2. Introduction ................................................................................. 14 2.3. Materials and Methods ..................................................................... 15 2.3.1. Study sites ..................................................................... 15 2.3.2. Sampling design ........................................................ -
Neoparamoeba Sp. and Other Protozoans on the Gills of Atlantic Salmon Salmo Salar Smolts in Seawater
DISEASES OF AQUATIC ORGANISMS Vol. 76: 231–240, 2007 Published July 16 Dis Aquat Org Neoparamoeba sp. and other protozoans on the gills of Atlantic salmon Salmo salar smolts in seawater Mairéad L. Bermingham*, Máire F. Mulcahy Environmental Research Institute, Aquaculture and Fisheries Development Centre, Department of Zoology, Ecology and Plant Science, National University of Ireland, Cork, Ireland ABSTRACT: Protozoan isolates from the gills of marine-reared Atlantic salmon Salmo salar smolts were cultured, cloned and 8 dominant isolates were studied in detail. The light and electron-micro- scopical characters of these isolates were examined, and 7 were identified to the generic level. Struc- ture, ultrastructure, a species-specific immunofluorescent antibody test (IFAT), and PCR verified the identity of the Neoparamoeba sp. isolate. Five other genera of amoebae, comprising Platyamoeba, Mayorella, Vexillifera, Flabellula, and Nolandella, a scuticociliate of the genus Paranophrys, and a trypanosomatid (tranosomatid-bodonid incertae sedis) accompanied Neoparamoeba sp. in the gills. The pathogenic potential of the isolated organisms, occurring in conjunction with Neoparamoeba sp. in the gills of cultured Atlantic salmon smolts in Ireland, remains to be investigated KEY WORDS: Amoebic gill disease · Neoparamoeba sp. · Amoebae · Platyamoeba sp. · Scuticociliates · Trypanosomatids Resale or republication not permitted without written consent of the publisher INTRODUCTION 1990, Palmer et al. 1997). However, simultaneous iso- lation of amoebae other than Neoparamoeba sp. from Various protozoans have been associated with gill the gills of clinically diseased fish has raised the disease in fish. Those causing the most serious mor- question of the possible involvement of such amoe- talities in fish are generally free-living species of bae in the disease (Dyková et al. -
Protistology Light-Microscopic Morphology and Ultrastructure Of
Protistology 13 (1), 26–35 (2019) Protistology Light-microscopic morphology and ultrastructure of Polychaos annulatum (Penard, 1902) Smirnov et Goodkov, 1998 (Amoebozoa, Tubulinea, Euamo- ebida), re-isolated from the surroundings of St. Petersburg (Russia) Oksana Kamyshatskaya1,2, Yelisei Mesentsev1, Ludmila Chistyakova2 and Alexey Smirnov1 1 Department of Invertebrate Zoology, Faculty of Biology, St. Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia 2 Core Facility Center “Culturing of microorganisms”, Research park of St. Petersburg State Univeristy, St. Petersburg State University, Botanicheskaya St., 17A, 198504, Peterhof, St. Petersburg, Russia | Submitted December 15, 2018 | Accepted January 21, 2019 | Summary We isolated the species Polychaos annulatum (Penard, 1902) Smirnov et Goodkov, 1998 from a freshwater habitat in the surrounding of Saint-Petersburg. The previous re-isolation of this species took place in 1998; at that time the studies of its light- microscopic morphology were limited with the phase contrast optics, and the electron- microscopic data were obtained using the traditional glutaraldehyde fixation, preceded with prefixation and followed by postfixation with osmium tetroxide. In the present paper, we provide modern DIC images of P. annulatum. Using the fixation protocol that includes a mixture of the glutaraldehyde and paraformaldehyde we were able to obtain better fixation quality for this species. We provide some novel details of its locomotive morphology, nuclear morphology, and ultrastructure. The present finding evidence that P. annulatum is a widely distributed species that could be isolated from a variety of freshwater habitats. Key words: amoebae, Polychaos, ultrastructure, Amoebozoa Introduction Amoeba proteus). These amoebae usually have a relatively large size, exceeding hundred of microns, The largest species of naked lobose amoebae they produce broad, thick pseudopodia with (gymnamoebae) – members of the family Amoe- smooth outlines (lobopodia). -
(Salmo Salar) with Amoebic Gill Disease (AGD) Chlo
The diversity and pathogenicity of amoebae on the gills of Atlantic salmon (Salmo salar) with amoebic gill disease (AGD) Chloe Jessica English BMarSt (Hons I) A thesis submitted for the degree of Doctor of Philosophy at The University of Queensland in 2019 i Abstract Amoebic gill disease (AGD) is an ectoparasitic condition affecting many teleost fish globally, and it is one of the main health issues impacting farmed Atlantic salmon, Salmo salar in Tasmania’s expanding aquaculture industry. To date, Neoparamoeba perurans is considered the only aetiological agent of AGD, based on laboratory trials that confirmed its pathogenicity, and its frequent presence on the gills of farmed Atlantic salmon with branchitis. However, the development of gill disease in salmonid aquaculture is complex and multifactorial and is not always closely associated with the presence and abundance of N. perurans. Moreover, multiple other amoeba species colonise the gills and their role in AGD is unknown. In this study we profiled the Amoebozoa community on the gills of AGD-affected and healthy farmed Atlantic salmon and performed in vivo challenge trials to investigate the possible role these accompanying amoebae play alongside N. perurans in AGD onset and severity. Significantly, it was shown that despite N. perurans being the primary aetiological agent, it is possible AGD has a multi-amoeba aetiology. Specifically, the diversity of amoebae colonising the gills of AGD-affected farmed Atlantic salmon was documented by culturing the gill community in vitro, then identifying amoebae using a combination of morphological and sequence-based taxonomic methods. In addition to N. perurans, 11 other Amoebozoa were isolated from the gills, and were classified within the genera Neoparamoeba, Paramoeba, Vexillifera, Pseudoparamoeba, Vannella and Nolandella. -
Diversity, Phylogeny and Phylogeography of Free-Living Amoebae
School of Doctoral Studies in Biological Sciences University of South Bohemia in České Budějovice Faculty of Science Diversity, phylogeny and phylogeography of free-living amoebae Ph.D. Thesis RNDr. Tomáš Tyml Supervisor: Mgr. Martin Kostka, Ph.D. Department of Parasitology, Faculty of Science, University of South Bohemia in České Budějovice Specialist adviser: Prof. MVDr. Iva Dyková, Dr.Sc. Department of Botany and Zoology, Faculty of Science, Masaryk University České Budějovice 2016 This thesis should be cited as: Tyml, T. 2016. Diversity, phylogeny and phylogeography of free living amoebae. Ph.D. Thesis Series, No. 13. University of South Bohemia, Faculty of Science, School of Doctoral Studies in Biological Sciences, České Budějovice, Czech Republic, 135 pp. Annotation This thesis consists of seven published papers on free-living amoebae (FLA), members of Amoebozoa, Excavata: Heterolobosea, and Cercozoa, and covers three main topics: (i) FLA as potential fish pathogens, (ii) diversity and phylogeography of FLA, and (iii) FLA as hosts of prokaryotic organisms. Diverse methodological approaches were used including culture-dependent techniques for isolation and identification of free-living amoebae, molecular phylogenetics, fluorescent in situ hybridization, and transmission electron microscopy. Declaration [in Czech] Prohlašuji, že svoji disertační práci jsem vypracoval samostatně pouze s použitím pramenů a literatury uvedených v seznamu citované literatury. Prohlašuji, že v souladu s § 47b zákona č. 111/1998 Sb. v platném znění souhlasím se zveřejněním své disertační práce, a to v úpravě vzniklé vypuštěním vyznačených částí archivovaných Přírodovědeckou fakultou elektronickou cestou ve veřejně přístupné části databáze STAG provozované Jihočeskou univerzitou v Českých Budějovicích na jejích internetových stránkách, a to se zachováním mého autorského práva k odevzdanému textu této kvalifikační práce. -
Protistology Re Description of Vannella Mira Schaeffer 1926
Protistology 2 (3), 178–184 (2002) Protistology Redescription of Vannella mira Schaeffer 1926 (Gymnamoebia, Vannellidae), an often mentioned but poorly known amoebae species Alexey V. Smirnov Marine Biological Laboratory University of Copenhagen, Helsingor, Denmark and Department of Invertebrate Zoology, Faculty of Biology and Soil Sci., St.Petersburg State University Summary Amoebae species Vannella mira Schaeffer 1926 was relatively well described and has often been discovered in various regional faunas. However, there is still no clear understanding as to what we really mean by the name “Vannella mira”. A.A. Schaeffer described this species from marine environment in 1926 (as Flabellula mira), but further researchers applied this name for several brackish and freshwater isolates. F.C. Page redescribed “V. mira” in 1968 from freshwater and in 1976 listed it among freshwater amoebae. Perhaps, it was a misidentification. In 1988 he revised his opinion stating that “long experience has failed to reveal any other gymnamoeba occurring in both fresh and salt water” and applied a specific name Vannella cirifera Frenzel 1892 to the isolate that he previously called V. mira. However, various authors used the name V. mira for different marine and freshwater isolates even after the renaming. The present paper describes a marine amoeba isolated from cyanobacterial mats in France (Camarque) that corresponds in full to Schaeffer’s initial description of “Flabellula mira”. New type material is established for the species V. mira Schaeffer 1926; it remains a type species of the genus Vannella. Key words: amoebae, Vannella, Lobosea, Gymnamoebia, morphology, systematics, Vannellidae Introduction shape always present in endoplasm. No vacuoles. -
First Report of Vannellidae Amoebae (Vannella Spp.) Isolated from Biofilm Source
Iranian J Parasitol: Vol. 6, No.4, 2011, pp.84-89 Iranian J Parasitol Tehran University of Medical Open access Journal at Sciences Publication http:// ijpa.tums.ac.ir Iranian Society of Parasitology http:// tums.ac.ir http:// isp.tums.ac.ir Short Communication First Report of Vannellidae Amoebae (Vannella Spp.) Isolated From Biofilm Source Z Lasjerdi1, *M Niyyati1, A Haghighi1, F Zaeri2, E Nazemalhosseini Mojarad3 on Wednesday, April 18, 2012 1Department of Medical Parasitology and Mycology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran 2 School of Paramedical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran 3Research Center for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sci- ences, Tehran, Iran (Received 25 May 2011; accepted 14 Nov 2011) ABSTRACT http://journals.tums.ac.ir/ Background: Members of the Vannellidae family are free-living amoebae (FLA) distributed mainly in water and soil sources. The present study reports the first isolation of this genus in the biofilm source from hospital environment in Tehran, Iran. Methods: Biofilm samples were collected from hospital environment. Cultivation was performed in non-nutrient agar covered with a heat-killed Escherichia coli. Cloning of the suspected amoe- Downloaded from bae was done. PCR amplification and Homology analysis using the Basic Local Alignment Search Tool (BLASTn) was performed to search for the most similar reference sequences. Results: Microscopic examination showed numerous fan-shaped amoebae and peculiar cysts different to the usual Archiveshape of typical FLA. Sequence a nalofysis of th e SIDPCR- product revealed that the suspected amoebae are highly homologous with Vannella spp. -
Two New Species of Ripella (Amoebozoa, Vannellida) and Unusual
Available online at www.sciencedirect.com ScienceDirect European Journal of Protistology 61 (2017) 92–106 Two new species of Ripella (Amoebozoa, Vannellida) and unusual intragenomic variability in the SSU rRNA gene of this genus a,∗ a,b Alexander Kudryavtsev , Anna Gladkikh a Department of Invertebrate Zoology, Faculty of Biology, Saint-Petersburg State University, 199034 Saint-Petersburg, Russia b Irkutsk Antiplague Research Institute of Siberia and Far East, 664047 Irkutsk, Russia Received 3 June 2017; received in revised form 22 August 2017; accepted 8 September 2017 Available online 14 September 2017 Abstract Two new species, Ripella decalvata and R. tribonemae (Amoebozoa, Vannellida), are described and the diversity of known strains assigned to the genus analyzed. Ripella spp. are closely similar to each other in the light microscopic characters and sequences of small-subunit (SSU) ribosomal RNA gene, but differences in the cell coat structure and cytochrome oxidase (COI) gene sequences are more prominent. SSU rRNA in R. platypodia CCAP1589/2, R. decalvata and R. tribonemae demonstrates an unusual pattern of intragenomic variation. Sequencing of multiple molecular clones of this gene produced numerous sequence variants in a number of specific sites. These sites were usually terminal parts of several variable helices in all studied strains. Analysis of all known Ripella strains shows that SSU rRNA sites differing between strains of different origin are mainly restricted to these areas of the gene. There are only two sites, which differ between strains, but not within genomes. This intragenomic variability of the SSU rRNA gene, seemingly characteristic of all Ripella spp., was never reported to be so extensive in Amoebozoa. -
Comparative Genomics Supports Sex and Meiosis in Diverse Amoebozoa
GBE Comparative Genomics Supports Sex and Meiosis in Diverse Amoebozoa Paulo G. Hofstatter1,MatthewW.Brown2, and Daniel J.G. Lahr1,* 1Departamento de Zoologia, Instituto de Biociencias,^ Universidade de Sao~ Paulo, Brazil 2Department of Biological Sciences, Mississippi State University *Corresponding author: E-mail: [email protected]. Accepted: October 30, 2018 Data Deposition: Accession numbers are listed on a supplementary table 1, Supplementary Material online, already uploaded. Abstract Sex and reproduction are often treated as a single phenomenon in animals and plants, as in these organisms reproduction implies mixis and meiosis. In contrast, sex and reproduction are independent biological phenomena that may or may not be linked in the majority of other eukaryotes. Current evidence supports a eukaryotic ancestor bearing a mating type system and meiosis, which is a process exclusive to eukaryotes. Even though sex is ancestral, the literature regarding life cycles of amoeboid lineages depicts them as asexual organisms. Why would loss of sex be common in amoebae, if it is rarely lost, if ever, in plants and animals, as well as in fungi? One way to approach the question of meiosis in the “asexuals” is to evaluate the patterns of occurrence of genes for the proteins involved in syngamy and meiosis. We have applied a comparative genomic approach to study the occurrence of the machinery for plasmogamy, karyogamy, and meiosis in Amoebozoa, a major amoeboid supergroup. Our results support a putative occurrence of syngamy and meiotic processes in all major amoebozoan lineages. We conclude that most amoebozoans may perform mixis, recombination, and ploidy reduction through canonical meiotic processes.