Resting cysts of Parentocirrus hortualis Voß, 1997 (Ciliophora, Hypotrichia), with preliminary notes on encystation and various types of excystation.

@article{Benaov2016RestingCO,
  title={Resting cysts of Parentocirrus hortualis Vo{\ss}, 1997 (Ciliophora, Hypotrichia), with preliminary notes on encystation and various types of excystation.},
  author={Simona Ben{\vc}aťov{\'a} and Eva Tirjakov{\'a} and Peter Vďa{\vc}n{\'y}},
  journal={European journal of protistology},
  year={2016},
  volume={53},
  pages={
          45-60
        }
}
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… Expand
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References

SHOWING 1-10 OF 33 REFERENCES
Some ultrastructural observations of the vegetative, resting and excysting ciliate, urostyla grandis (urostylidae, hypotrichida).
TLDR
It is concluded that the de-differentiation of microtubular organelles and the changes occurring in macronuclei in the resting Urostyla grandis, as well as the differentiation of cytoplasmic organlles, digestion by AVs, and the recombination of chromatin during excystment, are not similar to events that occur in non-kinetosome-resorbing cysts (NKR). Expand
The unusual, lepidosome-coated resting cyst of Meseres corlissi [Ciliophora: Oligotrichea]: transmission electron microscopy and phylogeny
TLDR
While the general wall structure indicates a sticho trichine relationship, the ectocyst, the lepidosomes, and the chitin layer in the cyst wall suggest the halteriids as a distinct group more closely related to the oligotrichine than stichotrichines spirotrichs. Expand
Infraciliature and morphogenesis of Paraholosticha sterkii (Garnjobst, 1934) n. comb. (Ciliophora, Hypotrichida).
  • J. Dieckmann
  • Biology, Medicine
  • European journal of protistology
  • 1988
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 tomiteExpand
Structure of Cyst Wall Precursors and Kinetics of Their Appearance During the Encystment of Laurentiella acuminata (Hypotrichida, Oxytrichidae)1
The encystment of Laurenliella acuminata was divided into five stages: stage A (precystic semitransparent cell with dark-globules), stage B (precystic transparent cell), stage C (precystic pigmentedExpand
Differentiation during encystment and excystment in Oxytricha fallax.
  • G. W. Grimes
  • Biology, Medicine
  • The Journal of protozoology
  • 1973
TLDR
Despite the absence of visible ciliature in the mature cyst, the various primordia of the normal vegetative ciliatures arise during excystment in the same positional relations to one another as is characteristic of developments during cell division. Expand
Cortical morphogenesis during encystment in a ciliate, Euplotes encysticus Yonezawa, 1985.
TLDR
It is suggested that hypotrich cysts should be classified into at least 3 types, 1) Oxytricha-type, 2) Urostyla- type, and 3) Euplotes-type and that Euplotidae may occupy a phylogenetically distant position to other traditional hypotrichs. Expand
Cysteine Proteases and Cell Differentiation: Excystment of the Ciliated Protist Sterkiella histriomuscorum
TLDR
R reverse transcription-PCR experiments showed that both genes display differential expression between the cyst and the vegetative cells, and a phylogenetic analysis showed for the first time that the cathepsin B tree is paraphyletic and that the diverging S. histriomuscorum cathePSin B is closely related to its Giardia homologues, which take part in the Cyst wall breakdown process. Expand
Natural and cultured variability of Engelmanniella mobilis (Ciliophora, Hypotrichida); with notes on the ultrastructure of its resting cyst
TLDR
The variability of 2 Austrian populations, one Turkish (Tn), and one Japanese population (Jn) of the hypotrich ciliate Engelmanniella mobilis is compared by morphological and morphogenetic analyses suggesting that morphological differences originating during cultivation might be greater than those observed in natural populations. Expand
Cytochemical and Electrophoretic Studies on the Cyst Wall of a Ciliate, Histriculus muscorum Kahl
TLDR
The results demonstrate the possible presence of glycoproteins in the ectocyst and endocyst of a ciliate and the reaction to methenamine silver was more intense than that of the mature cyst. Expand
Morphological and phylogenetical studies on a new soil hypotrich ciliate: Kahliella matisi spec. nov. (Hypotrichia, Kahliellidae).
TLDR
The morphology, ontogenesis, encystment, and 18S rRNA gene sequence of a new soil hypotrich ciliate, Kahliella matisi, were studied, indicating a relationship with oxytrichids. Expand
...
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