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Euglenida (1):
Recent article
Euglenida
ISME Journal (4)9 2010
Abstract
We present a broad-ranging microscopic, molecular and microspectrophotometric analysis of uncultured P. sphagnophila collected from four field locations in Nova Scotia, Canada. Consistent with its morphological characteristics, 18S ribosomal DNA (rDNA) phylogenies indicate that P. sphagnophila is sp...
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PMID: 20376101
PDF is available here.
PDF is available here.
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Abstract
We suggest these are more likely the products of constructive neutral evolution, and as such do not necessarily confer any selective advantage at all....
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PMID: 19528647
PDF is available here.
PDF is available here.
Abstract
Spatial distribution pattern of heterotrophic flagellates within a macroscopically homogenous sphagnum parcel of a transitional bog in the southern taiga was studied. Under investigation was horizontal pattern at different scales (1 cm, 10 cm, 1 m, 10 m) and the vertical heterogeneity of the communi...
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PMID: 19326857
PDF is available here.
PDF is available here.
BMC Microbiology (9)1 2009
Abstract
We collected Calkinsia aureus from core samples taken from the low-oxygen seafloor of the Santa Barbara Basin (580 - 592 m depth), California. These biflagellates were distinctively orange in color and covered with a dense array of elongated epibiotic bacteria. Serial TEM sections through individual...
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PMID: 19173734
PDF is available here.
PDF is available here.
Systematic Parasitology (71)1 2008
Abstract
A new name, Michajlowastasia nom. nov., is introduced as a replacement name for the pre-occupied euglenoid genus name Parastasia Michajłow, 1972 (nec Westwood, 1841). Eighteen species-group names are referred to this new generic name.
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PMID: 18661253
PDF is available here.
PDF is available here.
Abstract
Abstract
The work investigates a small full-scale wastewater treatment system comprised by the following units in series: UASB reactor, three polishing ponds and one coarse rock filter. The overall performance of the system is analyzed based on three years of monitoring using physical-chemical and biological...
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PMID: 18845872
PDF is available here.
PDF is available here.
Abstract
Two different length cDNAs encoding triosephosphate isomerase (TIM) were identified in the two trophic modes of euglenoids, the phototrophic Euglena gracilis and Euglena intermedia and the saprotrophic Astasia longa. Sequence analyses and presequence prediction indicated that the shorter cDNA encode...
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PMID: 18460154
PDF is available here.
PDF is available here.
Abstract
We investigated the diplonemid Rhynchopus euleeides and the euglenids Petalomonas cantuscygni, Peranema trichophorum and Entosiphon sulcatum, using light and electron microscopy and molecular techniques. Our findings together with previously published data show that multi-chromosome mitochondrial ge...
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PMID: 17499547
PDF is available here.
PDF is available here.
Abstract
We describe the 69.2-kbp chloroplast genome of the model chlorarachniophyte Bigelowiella natans. The genome is highly reduced in size compared with plastids of other photosynthetic algae and is closer in size to genomes of several nonphotosynthetic plastids. Unlike nonphotosynthetic plastids, howeve...
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PMID: 16990439
PDF is available here.
PDF is available here.
Abstract
We describe Rhynchopus euleeides n. sp., using light and electron microscopy. This free-living flagellate, which was isolated earlier from a marine habitat, can be grown axenically in a rich medium based on modified seawater. In the trophic stage, cells are predominantly elliptical and laterally fla...
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PMID: 17403154
PDF is available here.
PDF is available here.
Abstract
We addressed deep euglenid phylogeny using the cytosolic form of the heat-shock protein 90 gene (hsp90), which has already been employed with some success in other groups of euglenozoans and eukaryotes in general. Hsp90 sequences were generated from three taxa of euglenids representing different deg...
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PMID: 17300525
PDF is available here.
PDF is available here.
Science of the Total Environment (369)1-3 2006
Abstract
We have investigated is a good model for nonspecific aquatic toxicity towards the three protozoas. Furthermore, correlation equations for nonspecific aqueous toxicity towards various biological systems, that we have found in this work and in previous studies, cover such a wide range that no single w...
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PMID: 16759684
PDF is available here.
PDF is available here.
Abstract
Abstract
During the past 16 years, the ciliate Balantidium jocularum has been collected from the intestines of many specimens of its fish host, Naso tonganus, all collected from the Great Barrier Reef near Lizard Island, Australia. Ciliates for this study of food consumption were isolated in 1988, 1989, 2003...
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PMID: 16872294
PDF is available here.
PDF is available here.
Abstract
Our results demonstrated that the cells were dorsoventrally flattened, shaped like elongated ovals with parallel lateral sides, 32.5-55.0 mum long and 20.0-35.0 mum wide. Moreover, two heterodynamic flagella emerged through funnels that were positioned subapically, each within a depression and separ...
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PMID: 16968450
PDF is available here.
PDF is available here.
Abstract
We propose a general developmental model that explains the evolutionary origin, diversification, and inheritance of pellicle strip patterns in phototrophic euglenids. Dividing cells of Euglena gracilis, E. viridis, and Phacus similis were observed with scanning electron microscopy in order to study...
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PMID: 16805902
PDF is available here.
PDF is available here.
Abstract
Abstract
An algal community was used to assess the quality of water of Haranbaree dam and Mosam river of Maharashtra. Pollution tolerant genera and species of 4 groups of algae from each of 3 stations of Haranbaree dam and Mosam river were recorded. By using Palmer's index of pollution for rating of water sa...
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PMID: 16161977
PDF is available here.
PDF is available here.
Revista de Biologia Tropical (52 Suppl 1) 2004
Abstract
The phytoflagellates are a heterogeneous group of autotrophic, heterotrophic and mixothrophic flagellates of trophic importance in several ecosystems. As in the rest of Latin America, the phytoflagellates that occur in the Mexican Pacific coasts are virtually unknown except for a few records. Their...
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PMID: 17465113
PDF is available here.
PDF is available here.
Trends in Microbiology (12)6 2004
Abstract
I argue that chloroplast acquisition profoundly altered the structure of certain euglenids, and that the complete absence of these modifications in other euglenozoans is most consistent with their never having had a chloroplast. Ultrastructural evidence suggests that chloroplasts arose relatively re...
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PMID: 15165602
PDF is available here.
PDF is available here.
Abstract
Abstract
We address this question using two nuclear-encoded proteins, the cytosolic isoforms of heat shock protein 90 (hsp90) and heat shock protein 70 (hsp70). For both proteins we examined sequences from the three primary groups within Euglenozoa (euglenids, diplonemids, and kinetoplastids), and from their...
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PMID: 15022770
PDF is available here.
PDF is available here.
Abstract
Sequence comparisons and a revised classification of the Euglenophyceae were based on 92 new SSU rDNA sequences obtained from strains of Euglena, Astasia, Phacus, Trachelomonas, Colacium, Cryptoglena, Lepocinclis, Eutreptia, Eutreptiella and Tetreutreptia. Sequence data also provided molecular signa...
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PMID: 12812373
PDF is available here.
PDF is available here.
Abstract
I intron (Pco.S516) which is unique among euglenozoans. Secondary structure predictions indicate that paired segments P1-P10 as well as several conserved elements typical of group I introns and of subclass IC1 in particular are present. Phylogenetic analyses of SSU rDNA sequences demonstrate a well-...
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PMID: 12812370
PDF is available here.
PDF is available here.
Abstract
Nuclear-encoded SSU rRNA genes from nine strains of Distigma and three strains of Astasia were sequenced and analysed phylogenetically with maximum-likelihood and maximum-parsimony methods. It could be demonstrated that the genus Distigma is paraphyletic, consisting of two distinct clades: one compr...
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PMID: 12710635
PDF is available here.
PDF is available here.
Abstract
Our molecular analyses clearly support the monophyly of the diplonemids comprising Rhynchopus and Diplonema. Yet the topology at the base of the euglenozoan tree remains unresolved, and especially the monophyly of the euglenids is arguable. SSU rDNA sequence analyses suggest that significantly diffe...
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PMID: 11891049
PDF is available here.
PDF is available here.
Journal of Plant Physiology (159)2 2002
Abstract
The unicellular freshwater flagellate Euglena gracilis and its close relative Astasia longa show a pronounced negative gravitaxis. Previous experiments revealed that gravitaxis is most likely mediated by an active physiological mechanism in which changes of the internal calcium concentration and the...
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PMID: 12481803
PDF is available here.
PDF is available here.
Abstract
The phylum Euglenozoa consists of three distinct groups: the euglenoids, diplonemids and kinetoplastids. The phylogenetic position of the diplonemids within this phylum remains unsettled, since both morphological and molecular data produce weak and contradictory results. It is shown here that taxono...
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PMID: 11760964
PDF is available here.
PDF is available here.
Journal of Plant Physiology (158)6 2001
Abstract
The colorless flagellate Astasia longa shows a pronounced negative gravitaxis. The calcium fluorescence indicator Calcium Crimson was used to detect changes of the intracellular calcium concentration during gravitactical orientation. Astasia shows an increase of the fluorescence after a lag phase of...
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PMID: 12481802
PDF is available here.
PDF is available here.
Abstract
In order to reconstruct the evolution of euglenid flagellates, euglenozoan SSU rDNA data have been used to investigate phylogenetic relationships with a focus on osmotrophic taxa and especially on the Rhabdomonadales. The dataset consisting of the SSU rDNAs of osmotrophic, phagotrophic and phototrop...
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PMID: 11411694
PDF is available here.
PDF is available here.
Abstract
Phylogenetic analyses of 35 strains including 25 previously published sequences and 10 which have been newly sequenced, representing two species of Euglena, five species of Phacus and three species of Astasia, were carried out using the SSU rDNA. Parsimony, distance and maximum-likelihood inferred p...
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PMID: 11411698
PDF is available here.
PDF is available here.
Abstract
Euglena gracilis is a photosynthetic, unicellular flagellate found in eutrophic freshwater habitats. The organisms control their vertical position in the water column using gravi- and phototaxis. Recent experiments demonstrated that negative gravitaxis cannot be explained by passive buoyancy but by...
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PMID: 11596644
PDF is available here.
PDF is available here.
Abstract
We outlined hypotheses about their evolution. We have attempted to standardize terms necessary for analytical comparisons of strips by providing a glossary and comparing published synonyms. Most of the substructural diversity found in euglenids is demonstrated with 13 representative taxa. Strips are...
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PMID: 12095109
PDF is available here.
PDF is available here.
Abstract
Complete gene map of the plastid genome of the nonphotosynthetic euglenoid flagellate Astasia longa.
Abstract
We have determined the complete sequence of the ptDNA of A. longa and established a complete gene map. All chloroplast genes for photosynthesis-related proteins are completely absent from the A. longa plastid DNA except for rbcL, the gene for the ribulose-1,5-bisphosphate carboxylase large subunit....
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PMID: 11212895
PDF is available here.
PDF is available here.
Current Genetics (37)6 2000
Abstract
We have looked for trans-splicing of nuclear mRNAs in several Euglenoid species. In Cyclidiopsis acus, Phacus curvicauda, Rhabdomonas costata and Menoidium pellucidum we showed that several premRNAs chosen at random are matured by a transsplicing process: we identified SL-RNA genes whose 5' ends (SL...
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PMID: 10905424
PDF is available here.
PDF is available here.
Abstract
In anticipation that improved knowledge of euglenid morphology will provide robust apomorphy-based definitions for clades, transmission and scanning electron microscopy were used to reveal novel morphological patterns associated with the euglenid pellicle. In some taxa, the number of pellicle strips...
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PMID: 11001144
PDF is available here.
PDF is available here.
Current Genetics (35)5 1999
Abstract
We have isolated genes encoding spliced leader-sequence RNA (SL-RNA) and we show that pre-mRNAs are matured via a trans-splicing reaction in E. sulcatum, as in the case of E. gracilis. The 2.5-kb repeated DNA fragment which encodes the SL-RNA gene also encodes a 5S rRNA gene as well as the genes for...
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PMID: 10369962
PDF is available here.
PDF is available here.
Abstract
We have added molecular characters from the Small Subunit (SSU) rDNA to generate an overall phylogenetic framework for the euglenoids. SSU rDNA sequences from photosynthetic, osmotrophic, and phagotrophic euglenoids were aligned based on secondary structure. Phylogenetic analysis using the conserved...
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PMID: 10361741
PDF is available here.
PDF is available here.
Abstract
I review evidence that all three of these protozoan plastid types originated by secondary symbiogenesis from eukaryotic symbionts. Instead of separate symbiogenetic events, I argue that dinoflagellate and sporozoan plastids are directly related and that the common ancestor of dinoflagellates and Spo...
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PMID: 18092388
PDF is available here.
PDF is available here.
Abstract
The fourth intron of the Euglena gracilis chloroplast photosystem II gene, psbCi4, is a 1,605-bp twintron composed of two group III introns and a coding locus for a 458-aa polypeptide, mat1, located in the internal intron. psbCi4 homologs have been identified in seven euglenoids, including E. myxocy...
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PMID: 9491607
PDF is available here.
PDF is available here.
Abstract
We investigated the distribution of post-translational modified Tyr- and Glu-tubulins during interphase of the primitive flagellate Entosiphon sulcatum. Immunofluorescence studies of simultaneously permeabilized and fixed cells revealed that microtubular structures comprising Ca(2+)-labile subpellic...
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PMID: 9528129
PDF is available here.
PDF is available here.
Journal of Plant Physiology (151)2 1997
Abstract
Three mutant strains of the phytoflagellate Euglena gracilis Z have been characterized in order to analyze the signal perception and signal transduction pathways involved in photo- and gravitaxis. Using the fluorescence of the chromophoric groups believed to be involved in photoperception (flavins a...
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PMID: 11540955
PDF is available here.
PDF is available here.
Journal of Plant Physiology (150)1-2 1997
Abstract
Euglena gracilis, a unicellular, photosynthetic flagellate, orients itself by means of gravi- and phototaxis to reach and stay in regions optimal for survival and growth. An improved version of the slow rotating centrifuge microscope, NIZEMI, was used to test wild type and mutant strains for their r...
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PMID: 11540159
PDF is available here.
PDF is available here.
Biochimica et Biophysica Acta (1255)2 1995
Abstract
A novel cytotoxic carbohydrate-conjugated ergosterol (astasin) was found in cells of the colorless euglenoid, Astasia longa. Astasin accounted for about 2.4% of the total lipid of the cells. FAB-MS spectra of astasin showed MH+, 583.3387 (M+, C35H50O7). Astasin was composed of ergosterol (1 eq.), al...
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PMID: 7696335
PDF is available here.
PDF is available here.
Abstract
We have determined the sequence of its 3'-region, which showed 87% homology with the same region of E. gracilis. Using plasmid pA1 S3-H1 containing S3-H1 fragment of A. longa rDNA the sequence of 28S rRNA gene 3'-region was determined. This sequence includes regions homologous to corresponding regio...
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PMID: 8552059
PDF is available here.
PDF is available here.
Abstract
Evolution of parasite--host systems should be treated as a specific kind of co-evolution. Although its course is in accordance with the general rules of organic world evolution, it has some peculiarities. One of them is retardation or acceleration of endoparasites' phylogenesis, as compared with the...
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PMID: 1822046
PDF is available here.
PDF is available here.