Abstract:
:The route of infection of two endonucleobiotic bacteria in Paramecium caudatum was investigated with the electron microscope. The bacterium Holospora elegans specifically infects the micronucleus, whereas Holospora obtusa infects the macronucleus. The infectious forms of both bacteria are ingested by the prospective host cell into a phagosome. The bacteria leave the phagosome without destroying its membrane. During their transport to the nuclei the bacteria remain surrounded by host membranes forming a transport vesicle. The outer membrane of the bacteria and the vesicle membrane become connected by fibrillar material. Eventually, the transport vesicles are encircled in addition by flat vesicles, which sometimes appear to be part of the endoplasmic reticulum. Later, membranes surrounding the bacterium in the host cytoplasm fuse with the membranes of the nuclear envelope and the bacterium is sluiced into the nucleus. As an alternative mode the infecting bacteria leave their transport-vesicles before invading the nucleus and seem to penetrate the nuclear envelope directly. Inside the nucleus chromatin granules immediately adhere to the bacterial surface. Later a dense layer of chromatin is formed around the endonucleobiotic bacterium.
journal_name
Eur J Protistoljournal_title
European journal of protistologyauthors
Görtz HD,Wiemann Mdoi
10.1016/S0932-4739(89)80037-9subject
Has Abstractpub_date
1989-02-24 00:00:00pages
101-9issue
2eissn
0932-4739issn
1618-0429pii
S0932-4739(89)80037-9journal_volume
24pub_type
杂志文章abstract::A new colpodid ciliate, Bresslauides pratensis n. sp., was discovered in soil from a meadow field in Turkey. Its morphology was investigated using live observation, protargol impregnation, silver nitrate impregnation, and scanning electron microscopy. The new species differs from the congeners by the following combina...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2012.01.006
更新日期:2012-08-01 00:00:00
abstract::Noctiluca scintillans (Macartney) Kofoid et Swezy, 1921 is an unarmoured heterotrophic dinoflagellate with a global distribution, and has been considered as one of the ancestral taxa among dinoflagellates. Recently, 18S rDNA, actin, alpha-, beta-tubulin, and Hsp90-based phylogenies have shown the basal position of the...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2009.11.001
更新日期:2010-05-01 00:00:00
abstract::Haploid micronuclei produced by meiosis in Paramecium caudatum are destined either to survive or to degenerate depending upon their position in the cytoplasm. The behavior of the four meiotic division products in living cells and their DNA synthesis patterns were examined to determine whether there were differences be...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/S0932-4739(11)80317-2
更新日期:1992-02-21 00:00:00
abstract::A new species of unicellular opisthokont protist, Nuclearia thermophila sp. nov., was isolated from the warm spring water of Yunoko Lake, Japan, and has been described using light and electron microscopy. It exists as a spherical floating form and a flattened amoeboid form showing various shapes. The cells occasionall...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2008.09.004
更新日期:2009-05-01 00:00:00
abstract::Acanthamoebae feed on bacteria but are also frequent hosts of bacterial symbionts. Here, we describe the stable co-occurrence of two symbionts, one affiliated to the genus Parachlamydia and the other to the candidate genus Paracaedibacter (Alphaproteobacteria), within a clinical isolate of Acanthamoeba hatchetti genot...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2016.04.002
更新日期:2016-10-01 00:00:00
abstract::We collected Rimaleptus binucleatus from soil in the surroundings of the town of Ulsan, South Korea. Its morphology and 18S rRNA gene were studied using standard methods. This possibly widely distributed species is characterized by: (i) a size of about 170-400×20-65μm; (ii) a narrowly to cylindrically dileptid body wi...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2014.07.003
更新日期:2014-10-01 00:00:00
abstract::Vertical variations in trophic-functional patterns of biofilm-dwelling ciliates were studied in coastal waters of the Yellow Sea, northern China. A total of 50 species were identified and assigned to four trophic-functional groups (TFgrs): algivores (A), bacterivorous (B), non-selective (N) and raptors (R). The trophi...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2018.01.003
更新日期:2018-04-01 00:00:00
abstract::Cotterillia bromelicola nov. gen., nov. spec. was discovered in the tanks of the Mexican bromeliad Tillandsia heterophylla. Its morphology, ontogenesis, and 18S rDNA were studied with standard methods. Cotterillia has many cirral rows on both sides of the body. Uniquely, and thus used to diagnose the new genus Cotteri...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2010.08.003
更新日期:2011-01-01 00:00:00
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journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/S0932-4739(11)80154-9
更新日期:1991-02-22 00:00:00
abstract::Fine structure of the membrane system was examined in a large heliozoon, Echinosphaerium akamae, especially by means of negative staining and thin sectioning under the electron microscope. In addition to solitary membranous organelles such as mitochondrion, Golgi apparatus and nuclear envelope, there was found a conti...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/S0932-4739(89)80047-1
更新日期:1989-02-24 00:00:00
abstract::Licnophora chattoni, found in association with Zyzzyzus warreni, a tubulariid hydroid epizoic in sponges from São Sebastião (SP, Brazil), is redescribed and illustrated using light and electron microscopy. The ciliate has a flexible, transparent body formed by an oval anterior region linked to the posterior basal disc...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2011.07.004
更新日期:2012-01-01 00:00:00
abstract::Difflugia is a morphologically diverse genus of testate amoebae, which are common components of freshwater ecosystems. We observed a new morphotype similar to Difflugia tuberspinifera but without spine in four Xiamen reservoirs, Fujian Province, southeast China. We investigated its morphology and biometry using light ...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2013.12.003
更新日期:2014-04-01 00:00:00
abstract::The morphology and infraciliature of two Frontonia species, F. shii spec. nov. and F. paramagna Chen et al., 2014, isolated from a freshwater pond in northeastern China, were investigated using living observation and silver staining methods Frontonia shii spec. nov. is recognized by the combination of the following ch...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2018.01.002
更新日期:2018-04-01 00:00:00
abstract::This paper summarises the Symposium 'Concepts in Protistology', during the VI European Congress of Protistology, Berlin, 25-29 July 2011. There is an increasing focus on cataloguing the number of species on earth, species barcoding initiatives, and the increasing need to reconcile molecular with morphological data in ...
journal_title:European journal of protistology
pub_type:
doi:10.1016/j.ejop.2011.11.004
更新日期:2012-05-01 00:00:00
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journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/S0932-4739(11)80427-X
更新日期:1991-03-28 00:00:00
abstract::Two new marine scuticociliates, Sathrophilus planus n. sp. and Pseudoplatynematum dengi n. sp., isolated from coastal waters of Qingdao, northern China, were investigated using live observation and silver impregnations. Sathrophilus planus can be recognized by its elongate and conspicuously flattened body, ca. 16 soma...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2010.03.002
更新日期:2010-08-01 00:00:00
abstract::The Javan ferret-badger Melogale orientalis (Carnivora: Mustelidae: Helictidinae) is a small carnivore endemic to Indonesia. In the family Mustelidae, 10 Eimeria, 12 Cystoisopora, one Isospora, and one Hammondia species are known, but no eimeriid coccidia has been yet described in the subfamily Helictinidae (ferret ba...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2019.125668
更新日期:2020-04-01 00:00:00
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journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2009.11.003
更新日期:2010-05-01 00:00:00
abstract::Neoparamoeba perurans is the aetiological agent of amoebic gill disease (AGD) in salmonids, however multiple other amoeba species colonise the gills and their role in AGD is unknown. Taxonomic assessments of these accompanying amoebae on AGD-affected salmon have previously been based on gross morphology alone. The aim...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2018.10.003
更新日期:2019-02-01 00:00:00
abstract::The infraciliature and morphogenesis of Paraholosticha sterkii (Garnjobst, 1934) n. comb. (Basionym: Stylonethes sterkii) are described. Before division a cell encysts and after division each tomite forms an individual cyst within the common one. The ciliates cease to move and the kinetome is resorbed. With the beginn...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/S0932-4739(88)80038-5
更新日期:1988-07-01 00:00:00
abstract::Rumen protozoal diversity in the Spanish ibex (SI) was studied in males (n=4), females (n=7) and young (n=4) from the Maestrazgo (Spain) and contrasted with domestic goats (n=3; DG) of the same region. There were no differences among SI types in protozoal concentration or in the number of protozoal species. Only proto...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2008.07.001
更新日期:2009-05-01 00:00:00
abstract::The morphology and morphogenesis of a marine ciliate, Epiclintes auricularis rarisetus nov. sspec., collected from Qingdao, northern China were studied on live and protargol-impregnated specimens. This isolate can be recognized by its elongate, contractile and tripartite body with a size of 200-400 x 20-40microm in vi...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2009.01.005
更新日期:2009-11-01 00:00:00
abstract::Toxoplasma gondii is a zoonotic parasite with a world-wide distribution. House mice (Mus musculus) play an important role as a reservoir host in the parasite life cycle. However, their detection in mouse brain is limited because the host potentially harbours only a few tissue cysts. In order to improve the diagnosis, ...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2013.08.002
更新日期:2014-02-01 00:00:00
abstract::A new ciliate species (Cyclidium porcatum) is the first freshwater anaerobic scuticociliate to be cultured and described. It contains a unique tripartite structure consisting of hydrogenosomes (confirmed by cytochemical staining for hydrogenase), interspersed with methanogens (confirmed by auto fluorescence and in sit...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/S0932-4739(11)80281-6
更新日期:1993-05-28 00:00:00
abstract::The marine dinoflagellate Cochlodinium polykrikoides is a harmful algal bloom (HAB) species that severely impacts the environment and causes huge economic losses. Yellow clay (YC), considered to be a non-toxic and naturally-occurring material, represents an important step towards the direct control of HABs. In the pre...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2019.125642
更新日期:2019-10-01 00:00:00
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journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2006.07.001
更新日期:2006-11-01 00:00:00
abstract::Shifts in community composition of soil protozoa in response to climate change may substantially influence microbial activity and thereby decomposition processes. However, effects of climate and vegetation on soil protozoa remain poorly understood. We studied the distribution of soil testate amoebae in herbaceous and ...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2012.08.004
更新日期:2013-05-01 00:00:00
abstract::The free-living anaerobic flagellate Psalteriomonas vulgaris n. spec. is described. The organism has four flagella of equal length which arise immediately subapically to the anterior part of the cell, within the apex of the ventral groove. The ultrastructural organization of the mastigont system and the ventral groove...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/S0932-4739(11)80302-0
更新日期:1993-02-19 00:00:00
abstract::The species Leptomyxa flabellata was described by Goodey in 1915 and re-isolated by Pussard and Pons in 1976. It seems that it was never seen (or never recognized) again since that time. The strain designated as "Leptomyxa flabellata CCAP 1546/2" was studied by Cann in 1984, however the quality of the electron microsc...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2017.12.001
更新日期:2018-02-01 00:00:00
abstract::Mitotis in the choanoflagellate Monosiga sp. has been studied by electron microscopy for the first time based on serial sections of metaphase and anaphase. The dense metaphase plate is formed by chromosomes at the centre of the nucleus. Spindle poles are located at the opposite sides of this plate. The nuclear envelop...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/S0932-4739(11)80292-0
更新日期:1993-02-19 00:00:00