Urospora ovalis – coelomic gregarine from the White Sea
polychaete Travisia forbesii

a 2014

Urospora ovalis – coelomic gregarine from the White Sea polychaete Travisia forbesii

DIAKIN, Andrei, Gita G. PASKEROVA, Timur G. SIMDYANOV and Andrea VALIGUROVÁ

Basic information

Original name

Urospora ovalis – coelomic gregarine from the White Sea polychaete Travisia forbesii

Authors

DIAKIN, Andrei (643 Russian Federation, guarantor, belonging to the institution), Gita G. PASKEROVA (643 Russian Federation), Timur G. SIMDYANOV (643 Russian Federation) and Andrea VALIGUROVÁ (703 Slovakia, belonging to the institution)

Edition

V4 Parasitological Meeting, 2014

Other information

Language

English

Type of outcome

Konferenční abstrakt

Field of Study

10600 1.6 Biological sciences

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

RIV identification code

RIV/00216224:14310/14:00073898

Organization unit

Faculty of Science

Keywords in English

Urosporids; gregarines; motility; cortex; morphology

Změněno: 25/9/2014 13:09, Andrei Diakin, Ph.D., MSc

Abstract

V originále

Urosporids parasitize wide range of animals (echinoderms, annelids and ascidians) inhabiting coelom, intestine etc. Translocation within host causes changes in morphology and motility mode together with a structural modification of cortical zone. Particularly, gregarines of the family Urosporidae exhibit considerable morphological plasticity. This family comprises representatives inhabiting various host biotopes and showing different types of motility: gliding movement (Urospora travisiae), metaboly (Urospora ovalis) or peristalsis (Pterospora floridiensis), as well as immotile species (Urospora chiridotae, Lithocystis spp. and Gonospora spp.). Trophozoites of U. ovalis are spindle-shaped and lack any signs of cell polarity and show metabolic activity. TEM confirms that trophozoites are covered by a trimembrane pellicle. It forms numerous longitudinal epicytic folds that extend from one to another cell pole. In the apical part of these folds, two or three apical arcs can be poorly observed between the plasma membrane and the external cytomembrane. Just beneath the internal cytomembrane, there is a single rod of electron-dense material situated. Subjacent fibrillar layer can be found under pellicle. Micropores were found in between epicytic folds. In the region of cell constriction cortical zone forms superfolds. Superfolds are also covered by epicytic folds. Cytoplasm of gregarines subdivided into two regions: cortical zone with various filamentous structures, and endoplasm containing nucleus, majority of cellular organelles, amylopectin granules and other inclusions. New SSU sequences of U. ovalis belongs to the Lecudinoidea clade, however they affiliate not with other coelomic urosporids (Pterospora spp.) but with intestinal lecudinids. Our new obtained data confirm the theory on independent and parallel origin of coelomic gregarines. We also assumed parallel evolution of cell cortex morphological adaptations as a response to parasitism in different host biotopes.

Links

GBP505/12/G112, research and development project

Name: ECIP - Evropské centrum ichtyoparazitologie

Investor: Czech Science Foundation

Citovat

DIAKIN, Andrei, Gita G. PASKEROVA, Timur G. SIMDYANOV and Andrea VALIGUROVÁ. Urospora ovalis – coelomic gregarine from the White Sea polychaete Travisia forbesii. In V4 Parasitological Meeting. 2014.

@proceedings{1199203,
   author = {Diakin, Andrei and Paskerova, Gita G. and Simdyanov, Timur G. and Valigurová, Andrea},
   booktitle = {V4 Parasitological Meeting},
   keywords = {Urosporids; gregarines; motility; cortex; morphology},
   language = {eng},
   title = {Urospora ovalis – coelomic gregarine from the White Sea polychaete Travisia forbesii},
   year = {2014}
}

TY  - CONF
ID  - 1199203
AU  - Diakin, Andrei - Paskerova, Gita G. - Simdyanov, Timur G. - Valigurová, Andrea
PY  - 2014
TI  - Urospora ovalis – coelomic gregarine from the White Sea polychaete Travisia forbesii
KW  - Urosporids
KW  - gregarines
KW  - motility
KW  - cortex
KW  - morphology
N2  - Urosporids parasitize wide range of animals (echinoderms, annelids and ascidians) inhabiting coelom, intestine etc. Translocation within host causes changes in morphology and motility mode together with a structural modification of cortical zone. Particularly, gregarines of the family Urosporidae exhibit considerable morphological plasticity. This family comprises representatives inhabiting various host biotopes and showing different types of motility: gliding movement (Urospora travisiae), metaboly (Urospora ovalis) or peristalsis (Pterospora floridiensis), as well as immotile species (Urospora chiridotae, Lithocystis spp. and Gonospora spp.). Trophozoites of U. ovalis are spindle-shaped and lack any signs of cell polarity and show metabolic activity. TEM confirms that trophozoites are covered by a trimembrane pellicle. It forms numerous longitudinal epicytic folds that extend from one to another cell pole. In the apical part of these folds, two or three apical arcs can be poorly observed between the plasma membrane and the external cytomembrane. Just beneath the internal cytomembrane, there is a single rod of electron-dense material situated. Subjacent fibrillar layer can be found under pellicle. Micropores were found in between epicytic folds. In the region of cell constriction cortical zone forms superfolds. Superfolds are also covered by epicytic folds. Cytoplasm of gregarines subdivided into two regions: cortical zone with various filamentous structures, and endoplasm containing nucleus, majority of cellular organelles, amylopectin granules and other inclusions. New SSU sequences of U. ovalis belongs to the Lecudinoidea clade, however they affiliate not with other coelomic urosporids (Pterospora spp.) but with intestinal lecudinids. Our new obtained data confirm the theory on independent and parallel origin of coelomic gregarines. We also assumed parallel evolution of cell cortex morphological adaptations as a response to parasitism in different host biotopes.
ER  -

DIAKIN, Andrei, Gita G. PASKEROVA, Timur G. SIMDYANOV and Andrea VALIGUROVÁ. Urospora ovalis – coelomic gregarine from the White Sea polychaete Travisia forbesii. In \textit{V4 Parasitological Meeting}. 2014.

Detailed Information on Publication Record