Read by QxMD icon Read

European Journal of Protistology

Kenneth Dumack, Sebastian Flues, Karoline Hermanns, Michael Bonkowski
Cercozoa are a highly diverse protist phylum in soils and in the phyllosphere of plants. Many families are still poorly described and the vast majority of species are still unknown. Although testate amoebae are among the better-studied protists, only little quantitative information exists on the morphology, phylogeny and ecology of cercozoan Rhogostomidae. We cultured four different strains of Rhogostoma spp. isolated from Arabidopsis leaves, agricultural soil and rhizosphere soil of Ocimum basilicum and Nicotiana sp...
June 13, 2017: European Journal of Protistology
Akira Ito, Winnie Eckardt, Tara S Stoinski, Thomas R Gillespie, Toshihiro Tokiwa
A new entodiniomorphid ciliate species, Gorilloflasca africana n. g., n. sp. was described from the Virunga mountain gorillas, Gorilla beringei beringei, in Rwanda. It is characterized by a flask-shaped body, a long tubular vestibulum, a round frontal lobe, a large posterior cavity, an ellipsoidal or peanut-shaped macronucleus and a single contractile vacuole. G. africana has the adoral and the vestibular ciliary zones in the buccal area. The adoral ciliary zone is non-retractable, encircling the vestibular opening...
June 13, 2017: European Journal of Protistology
Sebastian Dirren, Gianna Pitsch, Marisa O D Silva, Thomas Posch
During the last decades, the planktonic cyanobacterium Planktothrix rubescens became a dominant primary producer in many deep pre-alpine lakes. While altered physiochemical conditions due to lake warming seem to favour this cyanobacterial species, its dominance is partly attributed to factors conferring grazing resistance. The rigid structure of the cyanobacterial filaments and toxic secondary metabolites (e.g. microcystins) protect against diverse grazers. Nonetheless, species of the protistan genus Nuclearia (Nucleariidae, Opisthokonta) are able to overcome this grazing protection...
June 8, 2017: European Journal of Protistology
Enrique Lara, Leonardo D Fernández, M Romina Schiaffino, Irina Izaguirre
We characterized molecularly the first freshwater member ever reported for the family Bathycoccaceae in Lake Musters (Argentinean Patagonia). Members of this family are extremely numerous and play a key ecological role in marine systems as primary producers. We cloned a fragment comprising the SSU rRNA gene+ITS region from environmental DNA using specific mamiellophyte primers. The unique SSU rRNA gene sequence obtained clustered robustly with Bathycoccus prasinos. Analysis of the two-dimensional structure of the ITS region showed the presence of a typical supplementary helix in the ITS-2 region, a synapomorphy of Bathycoccaceae, which confirmed further its phylogenetic placement...
June 8, 2017: European Journal of Protistology
Sonja Rueckert, Dušan Devetak
Gregarine apicomplexans are unicellular organisms that infect invertebrate hosts in marine, freshwater and terrestrial habitats. The largest group of invertebrates infested on land is the insects. The insect order Psocoptera (booklice) has recently gained wider interest due to specimens occurring in stored food products and therefore being considered pest organisms. Biological control agents are often used to eliminate pest organisms. In this study we examined the psocid Dorypteryx domestica, an invasive psocid species that is spreading all over the world...
May 31, 2017: European Journal of Protistology
Ferry Siemensma, Laure Apothéloz-Perret-Gentil, Maria Holzmann, Steffen Clauss, Eckhard Völcker, Jan Pawlowski
Most foraminifera inhabit marine habitats, but some species of monothalamids have been described from freshwater environments, mainly from Swiss water bodies over 100 years ago. Recent environmental DNA surveys revealed the presence of four major phylogenetic clades of freshwater foraminifera. However, until now only one of them (clade 2) has been associated to a morphologically described taxon-the family Reticulomyxidae. Here, we present morphological and molecular data for the genera representing the three remaining clades...
May 31, 2017: European Journal of Protistology
Ying Yan, Anna J Rogers, Feng Gao, Laura A Katz
Genome structure and nuclear organization have been intensely studied in model ciliates such as Tetrahymena and Paramecium, yet few studies have focused on nuclear features of other ciliate clades including the class Karyorelictea. In most ciliates, both the somatic macronuclei and germline micronuclei divide during cell division and macronuclear development only occurs after conjugation. However, the macronuclei of Karyorelictea are non-dividing (i.e. Div-) and develop anew from micronuclei during each asexual division...
May 22, 2017: European Journal of Protistology
Zhe Wang, Tong Zhou, Zemao Gu
Trichodinids are ciliated protozoan parasites or symbionts of marine and freshwater organisms. During a parasitic ciliate survey in Hubei, China, two Trichodina species, T. acutaLom, 1961 and T. hyperparasitis Chen & Hsish, 1984, were isolated from body surface of loach Misgurnus anguillicaudatus and gills of yellow catfish Pelteobagrus fulvidraco, respectively. The two species were investigated morphologically, based on silver-strained specimens, and their small subunit ribosomal RNA gene (SSU rDNA) sequences were sequenced...
May 20, 2017: European Journal of Protistology
Xumiao Chen, Xiaoteng Lu, Xiaotian Luo, Jiamei Jiang, Chen Shao, Khaled A S Al-Rasheid, Alan Warren, Weibo Song
In the five years 2012-2016, the ciliate research group at Ocean University of China and their collaborators have performed several investigations on the morphogenesis of ciliated protists during binary division. Multiple samples were collected from 17 cities and cortical development studied in 42 species belonging to 32 genera and 13 families (Amphisiellidae, Euplotidae, Kahliellidae, Oxytrichidae, Philasteridae, Pseudokeronopsidae, Pseudourostylidae, Schmidingerotrichidae, Spirofilidae, Strobilidiidae, Uroleptidae, Uronychiidae and Urostylidae)...
May 17, 2017: European Journal of Protistology
Xiaotian Luo, Lifang Li, Chundi Wang, William Bourland, Xiaofeng Lin, Xiaozhong Hu
Two oxytrichid ciliates, Stylonychia (Metastylonychia) nodulinucleata Shi and Li, 1993 and Gastrostyla steinii Engelmann, 1862; collected from Huguangyan Maar Lake and Shenzhen Mangrove Nature Protection Area, southern China, respectively, were investigated using standard methods. The uncommon species Stylonychia (Metastylonychia) nodulinucleata can be recognized by its large body size, the conspicuous caudal cirri in vivo, and a moniliform macronucleus. We provide the first record of the small subunit ribosomal RNA (SSU rRNA) gene sequence for the species...
May 17, 2017: European Journal of Protistology
Taiz L L Simão, Adriana Giongo Borges, Kelsey A Gano, Austin G Davis-Richardson, Christopher T Brown, Jennie R Fagen, Eric W Triplett, Raquel Dias, Claudio A Mondin, Renata M da Silva, Eduardo Eizirik, Laura R P Utz
Bromeliads are a diverse group of plants that includes many species whose individuals are capable of retaining water, forming habitats called phytotelmata. These habitats harbor a diversity of organisms including prokaryotes, unicellular eukaryotes, metazoans, and fungi. Among single-celled eukaryotic organisms, ciliates are generally the most abundant. In the present study, we used Illumina DNA sequencing to survey the eukaryotic communities, especially ciliates, inhabiting the tanks of the bromeliads Aechmea gamosepala and Vriesea platynema in the Atlantic Forest of southern Brazil...
May 17, 2017: European Journal of Protistology
Olivia A Pilling, Anna J Rogers, Bethaney Gulla-Devaney, Laura A Katz
Epigenetics, a term with many meanings, can be broadly defined as the study of dynamic states of the genome. Ciliates, a clade of unicellular eukaryotes, can teach us about the intersection of epigenetics and evolution due to the advantages of working with cultivable ciliate lineages, plus their tendency to express extreme phenotypes such as heritable doublet morphology. Moreover, ciliates provide a powerful model for studying epigenetics given the presence of dimorphic nuclei - a somatic macronucleus and germline micronucleus - within each cell...
May 16, 2017: European Journal of Protistology
Feng Gao, Jie Huang, Yan Zhao, Lifang Li, Weiwei Liu, Miao Miao, Qianqian Zhang, Jiamei Li, Zhenzhen Yi, Hamed A El-Serehy, Alan Warren, Weibo Song
Due to complex morphological and convergent morphogenetic characters, the systematics of ciliates has long been ambiguous. Since 1990, the Laboratory of Protozoology, Ocean University of China, in collaboration with other research groups worldwide, has carried out a series of integrative investigations on ciliate systematics. To date, genomic DNA has been extracted from about 1700 ciliate strains, and phylogenetic analyses have been performed for two-thirds of orders. Main findings are: (1) Classifications of about 50 hypotrichous species have been resolved, although the monophylies of three hypotrichous orders remain unconfirmed; (2) Euplotia and two orders and all seven families within them are monophyletic assemblages; (3) Lynnella represents an order-level taxon, and is separated from two sister monophyletic subclasses Oligotrichia and Choreotrichia; (4) the peritrich families Zoothamniidae and Vorticellidae are separated from each other, and Zoothamnium exhibits a high genetic diversity; (5) the scuticociliate order Philasterida is monophyletic and separated from loxocephalids, and the thigmotrichids is a suborder within Pleuronematida; (6) 14 classes were recovered including one new class Protocruziea, and Mesodiniea is basal to subphyla Intramacronucleata and Postciliodesmatophora; (7) mitochondrial cytochrome c oxidase subunit I heteroplasmy was reported in ciliates for the first time, and candidate barcoding genes for Frontonia species identification were identified...
May 6, 2017: European Journal of Protistology
Kyung-Min Park, Namyi Chae, Jae-Ho Jung, Gi-Sik Min, Sanghee Kim, Helmut Berger
The morphology of Keronopsis helluo Penard, 1922, type species of Keronopsis, and Paraholosticha pannonica Gellért and Tamás, 1959, two little-known members of the Keronopsidae Jankowski, 1979, was described using standard methods. In addition, we sequenced the SSU rRNA of both species. Keronopsis helluo was isolated from a mossy soil from Robert Island (Antarctica) while P. pannonica was found in terrestrial moss from Alaska. Our data correspond very well with the original descriptions. The frontal ciliature of K...
May 4, 2017: European Journal of Protistology
Claudia Vannini, Cristiana Sigona, Martin Hahn, Giulio Petroni, Masahiro Fujishima
The Betaproteobacteria-Euplotes association is an obligatory symbiotic system involving a monophyletic group of ciliate species and two betaproteobacteria species which can be alternatively present. Recent data showed that this relationship has been established more than once and that several symbiont-substitution events took place, revealing a complex and intriguing evolutionary path. Due to the different evolutionary pathways followed by the different symbionts, each bacterial strain could have differentially evolved and/or lost functional traits...
June 2017: European Journal of Protistology
Mi-Hyun Park, Ji Hye Moon, Ki Nam Kim, Jae-Ho Jung
Pleurotricha oligocirrata nov. spec. was discovered in samples collected from a freshwater wetland in Korea and is described here based on its morphology, morphogenesis, and the nucleotide sequence of its nuclear small subunit ribosomal rRNA (SSU rRNA) gene. In its genus, P. oligocirrata is the only species that possesses one right marginal cirral row. The morphology of P. oligocirrata is as follows: body size 98-148×47-72μm in protargol preparations, colourless and rigid body; contractile vacuole anterior of mid-body near left margin; cortical granules lacking; two macronuclear nodules with two micronuclei; undulating membranes in Oxytricha pattern; 50-62 adoral membranelles, 23-27 frontal-ventral-transverse cirri, one left and one right marginal cirral row; six or seven dorsal kineties, including dorsomarginal rows, with three caudal cirri...
June 2017: European Journal of Protistology
Klára Kellnerová, Nikola Holubová, Anna Jandová, Antonín Vejčík, John McEvoy, Bohumil Sak, Martin Kváč
This study investigated the prevalence of Cryptosporidium in farmed fur animals in the Czech Republic and Poland. A total of 480 faecal samples were collected from fur animals, including 300 American mink (Mustela vison), 60 silver foxes (Vulpes vulpes), 50 long-tailed chinchillas (Chinchilla lanigera), and 70 nutrias (Myocastor coypus), at 14 farms. Samples were examined for the presence of Cryptosporidium using microscopy (following aniline-carbol-methyl violet staining) and sequence analysis of PCR amplified products...
June 2017: European Journal of Protistology
Fengchao Li, Zhao Lyu, Yanbo Li, Xinpeng Fan, Saleh A Al-Farraj, Chen Shao, Helmut Berger
The morphology, morphogenesis, and SSU rDNA sequence of a Caudiholosticha stueberi population from Southwest China soil were analyzed. The studies confirm the assumption of previous workers that this species has dorsomarginal kineties and thus does not belong to the urostyloids, but to the non-oxytrichid dorsomarginalian genus Uroleptus whose members have, in contrast to C. stueberi, a distinct tail. On the basis of two morphological features we split Uroleptus into three subgenera: U. (Uroleptus) (tail present; more than five transverse cirri; habitat freshwater), U...
June 2017: European Journal of Protistology
Fatma Gomaa, Daniel J G Lahr, Milcho Todorov, Jingchun Li, Enrique Lara
Arcellinid testate amoebae include a wide variety of amoeboid organisms whose test (shell) varies in shape, composition and size. A decade ago, we initiated molecular phylogenetic analyses based on SSU rRNA gene sequences and a taxonomic revision of Arcellinida. However, many lineages within Arcellinida still lack molecular data, and the phylogeny of this group is largely incomplete. In this study, we obtained SSU rRNA gene sequences from seven taxa, of which six have agglutinated shell (Difflugia oblonga, D...
June 2017: European Journal of Protistology
Lijuan Huang, Xuefen Lu, Changyu Zhu, Xiaofeng Lin, Zhenzhen Yi
Macronuclear chromosomes of ciliates, especially those of Spirotrichea, Armophorea and Phyllopharyngea, are extensively fragmented and their copy numbers vary significantly. A recent study suggested that parental RNA molecules regulate macronuclear copy number in offspring cells after conjugation. However, variations in patterns of macronuclear copy number during vegetative growth are not clear. Previous studies have reported macronuclear copy numbers of population averages, potentially masking individual variation...
June 2017: European Journal of Protistology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"