Abstract：
:Resting cysts of Parentocirrus hortualis were investigated, using live observation, SEM and TEM. Processes during encystation and excystation were observed in vivo under the light microscope. During encystation, the trophic body becomes globular, the ciliature is resorbed in an anterior direction, the macronuclear nodules fuse into an elongated mass, and finally a cyst wall develops. As typical for oxytrichids, the resting cysts of P. hortualis are of the kinetosome-resorbing type and their wall is made of four layers: ectocyst, mesocyst, endocyst, and metacyst. The beginning of excystation is indicated by the formation of an excystation vacuole that helps the regenerating specimen to break the cyst wall. The excysting specimen leaves the resting cyst in a thin membrane that is gradually resorbed in the outer environment. Also two other excystation modes were observed. During the rare mode, the excystation vacuole breaks the thin membrane instead of the cyst wall that ruptures under the pressure of the body of the regenerating specimen. During the reproduction mode, the regenerating specimen divides within the resting cyst, producing two to four tomites. This is the first report of division in resting cysts of oxytrichids, but reproduction in division cysts was already described in keronopsids.
journal_name
Eur J Protistoljournal_title
European journal of protistologyauthors
Benčaťová S,Tirjaková E,Vďačný Pdoi
10.1016/j.ejop.2015.12.003subject
Has Abstractpub_date
2016-04-01 00:00:00pages
45-60eissn
0932-4739issn
1618-0429pii
S0932-4739(15)00103-0journal_volume
53pub_type
杂志文章abstract：:The behavior of Euplotes crassus has been studied qualitatively and quantitatively in an attempt of throwing new light onto the problem of the relationships occurring among motor behavior, systematic position and evolutionary strategies of the ciliated protozoa. It was found that both single and paired Euplotes creep ...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/S0932-4739(88)80056-7
更新日期：1988-03-01 00:00:00
abstract：:The morphology, ontogenesis, conjugation, and phylogenetic position of Metopus boletus nov. spec. were studied using live observation, various silver impregnation methods, scanning electron microscopy, morphometry, and the 18S rRNA gene sequence. The new species is outstanding in having a mushroom-like appearance; a g...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/j.ejop.2019.04.002
更新日期：2019-06-01 00:00:00
abstract：:The morphology of four cyrtophorian ciliates, Dysteria ovalis, D. semilunaris, Phascolodon vorticella, and Chlamydonellopsis calkinsi, were investigated using living observation and protargol-staining. The morphology of D. ovalis is revealed in detail for the first time, and it is characterized by the following combin...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/j.ejop.2016.08.005
更新日期：2016-10-01 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
abstract：:We report the use of nile red as a rapid and inexpensive method to estimate cellular lipids in three species of Paramecium and in Tetrahymena by the direct application of the dye to living or fixed cells without extraction and purification. Qualitative estimates of the relative changes in the lipid content of cells of...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/S0932-4739(11)80129-X
更新日期：1990-06-29 00:00:00
abstract：:Hyalophysa clampi Browning and Landers, 2012 was reexamined to determine all stages in the life cycle of this symbiotic ciliate. The cell feeds as a normal exuviotroph within the exoskeleton of its molted crayfish host but does not encyst following the trophont stage. Trophonts transform into swimming tomont stages, w...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/j.ejop.2019.125654
更新日期：2020-02-01 00:00:00
abstract：:Light- and electron microscopical observations on the morphology of the nassulid ciliate Furgasonia blochmanni show that it has somatic kinetids which reveal the nassulid pattern of somatic mono- and dikinetids with a 'B-cartwheel' in the lumen of the kinetosome and paired alveolocysts as regular components of the kin...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/S0932-4739(88)80012-9
更新日期：1988-12-01 00:00:00
abstract：:Copidognathus nautilei Bartsch, 1997, from a hydrothermal vent field of the Mid-Atlantic Ridge at about 13 degrees N, 45 degrees W and 4090 m depth, was infested with the suctorian Corynophrya abyssalis n. sp., with up to 58 epizoans per mite. The new suctorian has a sacciform body with seven longitudinal ribs, a comp...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/j.ejop.2010.02.001
更新日期：2010-08-01 00:00:00
abstract：:We observed reproductive swarmer cells of the nassellarian and spumellarian polycystine radiolarians Didymocyrtis ceratospyris, Pterocanium praetextum, Tetrapyle sp., and Triastrum aurivillii using light, scanning and transmission electron microscopy. The swarmer cells had subspherical to ovoid or spindle shapes with ...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/j.ejop.2016.02.007
更新日期：2016-06-01 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：:During conjugation, Stylonychia mytilus undergoes repetitive somatic development by reorganizing the cortical ciliature consecutively for three times. The control of these reorganizations by the nucleus was investigated employing amicronucleates generated by microsurgery. When amicronucleates conjugate, they underwent...
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：:Five scuticociliates, collected from China, were morphologically studied using standard methods One represents a new member of the genus Falcicyclidium, F. citriforme nov. spec., which can be recognised mainly by a combination of the following characters: usually two macronuclear nodules, buccal field about half of bo...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/j.ejop.2017.03.003
更新日期：2017-06-01 00:00:00
abstract：:The living morphology, infraciliature and morphogenesis of a new ciliate, Urosomoida paragiliformis n. sp., collected from saline soil in Weinan, China, were studied in vivo and after protargol staining. Urosomoida paragiliformis n. sp. is characterized as follows: body elongate-elliptical with no tail, flexible and s...
journal_title：European journal of protistology
pub_type： 杂志文章,评审
doi：10.1016/j.ejop.2016.07.005
更新日期：2016-10-01 00:00:00
abstract：:A new Naegleria species, N. andersoni, is described that occurs world-wide. The new species consists of two subspecies and can be distinguished from previously described species on the basis of antigenic, isoenzyme and restriction enzyme DNA fragment differences and in maximum growth temperature tolerated. N. anderson...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/S0932-4739(88)80022-1
更新日期：1988-10-01 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：: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
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 cortical morphogenesis of Amphisiella australis Blatterer and Foissner, 1988 was investigated using protargol impregnation. In 43% of the examined cells the morphogenesis starts with a dedifferentiation of the two transverse cirri forming the oral primordium. In the other specimens the oral primordium either origi...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/S0932-4739(11)80004-0
更新日期：1992-11-20 00:00:00
abstract：:Lake Tanganyika is world famous for a fauna that is rich in endemic species. On the other hand, it seems to be particularly poor in species of planktonic ciliates. Only the coastal infusorial fauna, for the most part mesopsammic, constitutes an extensive biomass with relatively few species. However, some are character...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/S0932-4739(11)80144-6
更新日期：1991-02-22 00:00:00
abstract：:The effects of 0.2-2.0 mM PtCl(4) have been investigated, the purpose was to test whether the compound would affect Tetrahymena in a manner similar to that of cis-dichlorodiammine-platinum(II), or cisplatin, which in 0.83 mM inhibits cell proliferation for 24 h and induces diminution of the inner mitochondrial membran...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/S0932-4739(11)80044-1
更新日期：1992-05-22 00:00:00
abstract：:The apostome ciliate Hyalophysa chattoni, a symbiont of the estuarine grass shrimp Palaemonetes pugio, was tested for its growth and reproductive ability in a wide range of salinities from 0.1 to 55 ppt. Shrimp, with their attached ciliates, were slowly acclimated to different salinities in order to assess protozoan c...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/j.ejop.2007.11.002
更新日期：2008-05-01 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：:The living morphology, infraciliature and silverline system of two small marine Euplotes species, E. orientalis spec. nov. and E. raikoviAgamaliev, 1966, isolated from a sandy beach near Qingdao, China, were investigated. Euplotes orientalis is characterized by a combination of features including their small size (35-...
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：:Since its description 35 years ago from Quebec, Canada, the poorly known monospecific testate rhizopod genus Puytoracia (type species, Puytoracia bergeri) has been reported only from the Himalayan region of Nepal. This species was recently found at 13 locations in Ontario, Canada, and the range of form variation of th...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/j.ejop.2006.04.002
更新日期：2006-09-01 00:00:00
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：:The endonucleobiotic bacterium Holospora elegans inhabits the micronucleus of Paramecium caudatum. In this paper the release of the infectious form (IF) of H. elegans from its host is described. During the anaphase of the micronuclear division most of the IFs remain within the connecting piece which, therefore, may be...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/S0932-4739(89)80021-5
更新日期：1989-10-27 00:00:00
abstract：:This review gives a brief report on some recent advances in the study of molecular biology of ciliate genes. The main emphasis will be put on those results which may contribute to a better understanding of how gene structure and genome organization has evolved in ciliates. New data will be discussed in relation to the...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/S0932-4739(11)80384-6
更新日期：1990-08-31 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 free-living ciliates of the order Metopida Jankowski, 1980 are pivotal players in the microbial food web of the sulfuretum, acting as hosts to prokaryotic endo- and ectosymbionts. They are also of interest in the study of the function and evolution of their mitochondrion-related organelle, the hydrogenosome. The t...
journal_title：European journal of protistology
pub_type： 杂志文章
doi：10.1016/j.ejop.2017.07.003
更新日期：2017-10-01 00:00:00
