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Recovery of proliferative capability in gamma irradiated Colpoda cucullus (ciliated protist) resting cysts and its radiation hormesis 伽玛辐照后原纤毛虫静息囊增殖能力的恢复及其辐射激效
Protistology Pub Date : 2020-01-01 DOI: 10.21685/1680-0826-2020-14-3-5
R. Saito, R. Koizumi, T. Sakai, Taiga Shimizu, Taiki Ono, M. Wanner, T. Takyu, Toshihiko Tanaka, Yoichiro Sogame
{"title":"Recovery of proliferative capability in gamma irradiated Colpoda cucullus (ciliated protist) resting cysts and its radiation hormesis","authors":"R. Saito, R. Koizumi, T. Sakai, Taiga Shimizu, Taiki Ono, M. Wanner, T. Takyu, Toshihiko Tanaka, Yoichiro Sogame","doi":"10.21685/1680-0826-2020-14-3-5","DOIUrl":"https://doi.org/10.21685/1680-0826-2020-14-3-5","url":null,"abstract":"The resting cyst is one of the quietest life stages (i.e. cryptobiosis) with hardly measurable or even ceased metabolic activity. However, are the resting cysts just resting? Here, to our knowledge, we report for the first time radiation hormesis in resting cysts. In the present study, we focused on the proliferative capability of excysted cells from 500–4000 Gy-gamma-irradiated Colpoda cucullus resting cysts by a bioassay method. Generally, excysted cells from irradiated cysts lose their proliferative capability. However, we observed an increased proliferative capability promoted by low doses of irradiation. Cells, which had excysted from 500-Gy-irradiated cysts, restored their proliferation capability with a recovery period of 12 h and 24 h before excysting. Additionally, cells, which had excysted from 500-4000-Gy irradiated cysts, recovered proliferative capability by re-forming resting cysts. Here, the proliferative capability of excysted cells from 500-Gy-irradiated cysts was even higher than that of non-irradiated.","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67887949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Molecular phylogeny of Paradermamoeba valamo (Amoebozoa, Discosea, Dermamoebida) valamo副阿米巴的分子系统发育(阿米巴亚目，盘古目，皮阿米巴目)
Protistology Pub Date : 2020-01-01 DOI: 10.21685/1680-0826-2020-14-4-1
A. Smirnov, Nikita S. Kulishkin, A. A. Surkova, Y. Mesentsev, N. Bondarenko, E. Nassonova, Y. Mazei
{"title":"Molecular phylogeny of Paradermamoeba valamo (Amoebozoa, Discosea, Dermamoebida)","authors":"A. Smirnov, Nikita S. Kulishkin, A. A. Surkova, Y. Mesentsev, N. Bondarenko, E. Nassonova, Y. Mazei","doi":"10.21685/1680-0826-2020-14-4-1","DOIUrl":"https://doi.org/10.21685/1680-0826-2020-14-4-1","url":null,"abstract":"remarkable","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67888151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The interplay of two invaders: can blooms of the potentially toxic dinoflagellates Prorocentrum cordatum be downregulated by the neritic copepods Acartia tonsa? 两种入侵者的相互作用:有潜在毒性的双鞭毛藻原心(proorocentrum cordatum)的繁殖是否会被浅水桡足动物Acartia tonsa下调?
Protistology Pub Date : 2020-01-01 DOI: 10.21685/1680-0826-2020-14-3-1
I. Telesh, A. Khanaychenko, S. Skarlato
{"title":"The interplay of two invaders: can blooms of the potentially toxic dinoflagellates Prorocentrum cordatum be downregulated by the neritic copepods Acartia tonsa?","authors":"I. Telesh, A. Khanaychenko, S. Skarlato","doi":"10.21685/1680-0826-2020-14-3-1","DOIUrl":"https://doi.org/10.21685/1680-0826-2020-14-3-1","url":null,"abstract":"Summary The article compares ecological requirements of the potentially toxic bloom-forming dinoflagellates Prorocentrum cordatum and their grazers, the neritic calanoid copepods Acartia tonsa in the Baltic and Black seas. A preliminary analysis of the ecological niche characteristics of these two common invasive species allowed assuming the partial juxtaposition of their niches and speculating on the perspectives of this phenomenon for the invasion success and putative top-down control of harmful algal blooms in marine coastal ecosystems.","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67887882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
The aphelids, intracellular parasitoids of algae, consume the host cytoplasm “from the inside” 细胞质内的拟寄生藻类“从内部”吞噬宿主细胞质。
Protistology Pub Date : 2020-01-01 DOI: 10.21685/1680-0826-2020-14-4-7
S. Karpov, G. Paskerova
{"title":"The aphelids, intracellular parasitoids of algae, consume the host cytoplasm “from the inside”","authors":"S. Karpov, G. Paskerova","doi":"10.21685/1680-0826-2020-14-4-7","DOIUrl":"https://doi.org/10.21685/1680-0826-2020-14-4-7","url":null,"abstract":"Summary In this discussion, we are clarifying the interface between the aphelid trophont and the host in different life cycle stages from the invasion until zoospore maturation. As a result, we consider that the aphelid trophont does not consume host cytoplasm from outside, as it has been suggested earlier, but from inside, i","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67888779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
First findings of сentrohelid heliozoans (Haptista: Centroplasthelida) from marine and freshwater environments of South Korea 韩国海洋和淡水环境中胚芽纲动物的首次发现(Haptista: centrroplasthelida)
Protistology Pub Date : 2020-01-01 DOI: 10.21685/1680-0826-2020-14-4-4
Dmitry G. Zagumyonnyi, K. Prokina, D. Tikhonenkov
{"title":"First findings of сentrohelid heliozoans (Haptista: Centroplasthelida) from marine and freshwater environments of South Korea","authors":"Dmitry G. Zagumyonnyi, K. Prokina, D. Tikhonenkov","doi":"10.21685/1680-0826-2020-14-4-4","DOIUrl":"https://doi.org/10.21685/1680-0826-2020-14-4-4","url":null,"abstract":"","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67888936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Free-living ciliates in different coastal zone biotopes at the Azerbaijan sector of the Caspian Sea 里海阿塞拜疆段不同沿海带生物群落中的自由生活纤毛虫
Protistology Pub Date : 2019-01-01 DOI: 10.21685/1680-0826-2019-13-3-3
I. Alekperov, E. Tahirova
{"title":"Free-living ciliates in different coastal zone biotopes at the Azerbaijan sector of the Caspian Sea","authors":"I. Alekperov, E. Tahirova","doi":"10.21685/1680-0826-2019-13-3-3","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-3-3","url":null,"abstract":"Samples of plankton, periphyton, benthos and phytocyliocenoses (coastal thickets of aquatic plants with associated ciliates) were collected during 2010–2017 from 7 collection points (from north to south) along the Azerbaijan sector of the Caspian Sea coastal zone. In total, 463 species of free-living ciliates were found. The highest number of ciliate species was noted in the Divichi firth (214) and on the Absheron coast (203). The species composition in Nabran (179 species) and on the coast of Lankaran (107) and Astara (110) was much lower. Minimal species diversity was observed in the Kyzyl-Agach Bay (96) and estuary of the Kura River (72). The similarity of the freeliving ciliate species composition of the seven stationary points along the Azerbaijan sector of the Caspian Sea depends on the similarity of environmental conditions at these collection points, as well as on a certain distance between them. Species diversity in different biotopes of each of the seven stationary collection points showed that, despite the strong differences in the total number of the ciliate species found therein, approximately the same ratio of species diversity in various biotopes is characteristic for all collection points. It was established that in plankton communities there are from 9% to 16% of the total number of ciliate species, in periphyton – from 10% to 25%, in benthos from 30% to 40%, and in phytocyliocenoses communities – from 33% to 44%. The obtained data indicate a general pattern of the distribution of ciliate species richness among different biotopes, even considering the presence of many ciliate species simultaneously in several habitats.","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67887640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Protistologist Wladimir Timopheyevich Schewiakoff (1859–1930). On the shores of the Gulf of Naples 原生生物学家弗拉基米尔·季莫菲耶维奇·舍维亚克夫(1859-1930)。在那不勒斯海湾的岸边
Protistology Pub Date : 2019-01-01 DOI: 10.21685/1680-0826-2019-13-4-7
S. Fokin
{"title":"Protistologist Wladimir Timopheyevich Schewiakoff (1859–1930). On the shores of the Gulf of Naples","authors":"S. Fokin","doi":"10.21685/1680-0826-2019-13-4-7","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-4-7","url":null,"abstract":"Recently, on October 29, 2019, we celebrated the 160th anniversary of the great Russian protistologist – Wladimir Timopheyevich Schewiakoff (Fokin, 2000; Groeben and Fokin, 2013; Fokin and Zavoiskaya, 2016a, 2016b; Fokin, 2019), who is known in the International scientific community as a world-beloved specialist in ciliated protists (Ciliophora) and, simultaneously, in very specific marine planktonic unicellular organisms related to Radiolaria – Achantaria (Schewiakoff, 1889b, 1896, 1902, 1926)1. Working on the live acantharians in the Mediterranean Sea (Naples, Italy) and considering additional criteria of their cells, Prof. W.T. Schewiakoff emended the classification of the group in 1926 and set up the main taxonomic framework","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67887804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Molecular phylogeny of Aphelidium arduennense sp. nov. – new representative of Aphelida (Opisthosporidia) 阿菲利亚(Aphelidium arduennense sp. 11 .)的分子系统发育——阿菲利亚新代表
Protistology Pub Date : 2019-01-01 DOI: 10.21685/1680-0826-2019-13-4-2
Victoria S. Tcvetkova, N. Zorina, Maria A. Mamkaeva, S. Karpov
{"title":"Molecular phylogeny of Aphelidium arduennense sp. nov. – new representative of Aphelida (Opisthosporidia)","authors":"Victoria S. Tcvetkova, N. Zorina, Maria A. Mamkaeva, S. Karpov","doi":"10.21685/1680-0826-2019-13-4-2","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-4-2","url":null,"abstract":"Aphelids (Aphelida) are poorly known parasitoids of algae that have raised considerable interest because of their phylogenetic position as phagotrophic protists sister to Fungi. Together with Rozellida and Microsporidia they have been classified in the Opisthosporidia but seem to be more closely related to the Fungi rather than to the Cryptomycota and Microsporidia, the other members of the Opisthosporidia. Molecular environmental studies have revealed high genetic diversity within the aphelids, but only four genera have been described: Aphelidium, Amoeboaphelidium, Paraphelidium and Pseudaphelidium. Here, we describe the life cycle of a new species of Aphelidium, Aph. arduennense. Molecular phylogenetic analysis of its 18S rRNA indicates that Aph. arduennense is sister to Aph. tribonematis, and together with Aph. melosirae they form a monophyletic cluster. Within the aphelids, this cluster is distantly related to Paraphelidium and Amoeboaphelidium.","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67887844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
New insights into NO generation and AOX1 upregulation in Chlamydomonas 衣藻中NO生成和AOX1上调的新认识
Protistology Pub Date : 2019-01-01 DOI: 10.21685/1680-0826-2019-13-1-3
Mariya Ostroukhova, E. Ermilova
{"title":"New insights into NO generation and AOX1 upregulation in Chlamydomonas","authors":"Mariya Ostroukhova, E. Ermilova","doi":"10.21685/1680-0826-2019-13-1-3","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-1-3","url":null,"abstract":"","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"132 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67885640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Light-microscopic morphology and ultrastructure of Polychaos annulatum (Penard, 1902) Smirnov et Goodkov, 1998 (Amoebozoa, Tubulinea, Euamoebida), re-isolated from the surroundings of St. Petersburg (Russia) Smirnov et Goodkov, 1998(阿米巴虫目，管状目，真阿米巴虫目)，从圣彼得堡(俄罗斯)周围重新分离
Protistology Pub Date : 2019-01-01 DOI: 10.21685/1680-0826-2019-13-1-4
O. Kamyshatskaya, Y. Mesentsev, L. Chistyakova, A. Smirnov
{"title":"Light-microscopic morphology and ultrastructure of Polychaos annulatum (Penard, 1902) Smirnov et Goodkov, 1998 (Amoebozoa, Tubulinea, Euamoebida), re-isolated from the surroundings of St. Petersburg (Russia)","authors":"O. Kamyshatskaya, Y. Mesentsev, L. Chistyakova, A. Smirnov","doi":"10.21685/1680-0826-2019-13-1-4","DOIUrl":"https://doi.org/10.21685/1680-0826-2019-13-1-4","url":null,"abstract":"We isolated the species Polychaos annulatum (Penard, 1902) Smirnov et Goodkov, 1998 from a freshwater habitat in the surrounding of Saint-Petersburg. The previous re-isolation of this species took place in 1998; at that time the studies of its lightmicroscopic morphology were limited with the phase contrast optics, and the electronmicroscopic data were obtained using the traditional glutaraldehyde fixation, preceded with prefixation and followed by postfixation with osmium tetroxide. In the present paper, we provide modern DIC images of P. annulatum. Using the fixation protocol that includes a mixture of the glutaraldehyde and paraformaldehyde we were able to obtain better fixation quality for this species. We provide some novel details of its locomotive morphology, nuclear morphology, and ultrastructure. The present finding evidence that P. annulatum is a widely distributed species that could be isolated from a variety of freshwater habitats.","PeriodicalId":37502,"journal":{"name":"Protistology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67885865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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