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348 results on '"Yi, Zhenzhen"'

14. Ciliates — Protists with complex morphologies and ambiguous early fossil record

Author

Dunthorn, Micah, Lipps, Jere H., Dolan, John R., Saab, Marie Abboud-Abi, Aescht, Erna, Bachy, Charles, de Cao, María Sonia Barría, Berger, Helmut, Bourland, William A., Choi, Joong Ki, Clamp, John, Doherty, Mary, Gao, Feng, Gentekaki, Eleni, Gong, Jun, Hu, Xiaozhong, Huang, Jie, Kamiyama, Takashi, Johnson, Matthew D., Kammerlander, Barbara, Kim, Sun Young, Kim, Young-Ok, la Terza, Antonietta, Laval-Peuto, Michèle, Lipscomb, Diana, Lobban, Christopher S., Long, Hongan, Luporini, Pierangelo, Lynn, Denis H., Macek, Miroslav, Mansergh, Robert I., Martín-Cereceda, Mercedes, McManus, George G., Montagnes, David J.S., Ong'ondo, Geoffrey O., Patterson, David J., Pérez-Uz, Blanca, Quintela-Alonso, Pablo, Safi, Lúcia S.L., Santoferrara, Luciana F., Sonntag, Bettina, Song, Weibo, Stoeck, Thorsten, Stoecker, Diane K., Strüder-Kypke, Michaela C., Trautmann, Isabelle, Utz, Laura R.P., Vallesi, Adriana, Vd'ačný, Peter, Warren, Alan, Weisse, Thomas, Wickham, Stephen A., Yi, Zhenzhen, Zhang, Wuchang, Zhan, Zifeng, Zufall, Rebecca, and Agatha, Sabine

Published
2015
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21. Novel insights into molecular mechanisms of vegetative cell cycle and resting cyst formation in Apodileptus cf. visscheri (Alveolata, Ciliophora).

Author

Xu, Jiahui, Shen, Zhuo, Yu, Minjie, Sheng, Yalan, and Yi, Zhenzhen

Subjects
CELL cycle, CILIATA, LIFE cycles (Biology), CELL anatomy, CELL division, CELLULAR control mechanisms
Abstract

Ciliates usually with big cell sizes, complex morphological structures, and diverse life cycles, are good model organisms for studying cell proliferation regulation of eukaryotes. Up to date, the molecular regulation mechanisms for the vegetative cell cycle and encystment of these ciliates are poorly understood. Here, transcriptomes of Apodileptus cf. visscheri, which has an asexual vegetative cell cycle and is apt to encyst when environmental conditions become unfavorable, were sequenced to enrich our related knowledge. In this study, three replicates were sequenced for each of four cell stages, including initial period of growth, morphogenesis, cell division, and resting cyst. The significant transcription differences, involving cell cycle, biosynthesis, and energy metabolism pathways, were revealed between the resting cyst and vegetative cell cycle. Further investigations showed that the cell cycle pathway was enriched during morphogenesis stage and cell division stage. Compared to the initial period of growth stage, the differentially expressed genes involved in cellular components and molecular function were significantly enriched during cell division stage, while cellular components and biological processes were significantly enriched during morphogenesis stage. These provide novel insights into a comprehensive understanding at the molecular level of the survival and adaptive mechanism of unicellular eukaryotes. [ABSTRACT FROM AUTHOR]

Published
2023
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26. FUDAOWANG

Author

Xu, Wei, primary, Zhao, Ke, additional, Li, Yatao, additional, and Yi, Zhenzhen, additional

Published
2014
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28. 劳动制度对社会协同创新能力的影响 ——————以法国劳动法体系的嬗变为例

Author

Yi, Zhenzhen, Didry, Claude, Centre Maurice Halbwachs (CMH), École normale supérieure - Paris (ENS Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École des hautes études en sciences sociales (EHESS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SHS.SOCIO]Humanities and Social Sciences/Sociology, [SHS.DROIT]Humanities and Social Sciences/Law, [SHS.HIST]Humanities and Social Sciences/History, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2021

29. Genomic analysis finds no evidence of canonical eukaryotic DNA processing complexes in a free-living protist

Author

Salas-Leiva, Dayana E, Tromer, Eelco C, Curtis, Bruce A, Jerlström-Hultqvist, Jon, Kolisko, Martin, Yi, Zhenzhen, Salas-Leiva, Joan S, Gallot-Lavallée, Lucie, Williams, Shelby K, Kops, Geert J P L, Archibald, John M, Simpson, Alastair G B, Roger, Andrew J, Salas-Leiva, Dayana E, Tromer, Eelco C, Curtis, Bruce A, Jerlström-Hultqvist, Jon, Kolisko, Martin, Yi, Zhenzhen, Salas-Leiva, Joan S, Gallot-Lavallée, Lucie, Williams, Shelby K, Kops, Geert J P L, Archibald, John M, Simpson, Alastair G B, and Roger, Andrew J

Abstract

Cells replicate and segregate their DNA with precision. Previous studies showed that these regulated cell-cycle processes were present in the last eukaryotic common ancestor and that their core molecular parts are conserved across eukaryotes. However, some metamonad parasites have secondarily lost components of the DNA processing and segregation apparatuses. To clarify the evolutionary history of these systems in these unusual eukaryotes, we generated a genome assembly for the free-living metamonad Carpediemonas membranifera and carried out a comparative genomics analysis. Here, we show that parasitic and free-living metamonads harbor an incomplete set of proteins for processing and segregating DNA. Unexpectedly, Carpediemonas species are further streamlined, lacking the origin recognition complex, Cdc6 and most structural kinetochore subunits. Carpediemonas species are thus the first known eukaryotes that appear to lack this suite of conserved complexes, suggesting that they likely rely on yet-to-be-discovered or alternative mechanisms to carry out these fundamental processes.

Published
2021

30. Author Correction: Genomic analysis finds no evidence of canonical eukaryotic DNA processing complexes in a free-living protist (Nature Communications, (2021), 12, 1, (6003), 10.1038/s41467-021-26077-2)

Author

Hubrecht Institute with UMC, Salas-Leiva, Dayana E., Tromer, Eelco C., Curtis, Bruce A., Jerlström-Hultqvist, Jon, Kolisko, Martin, Yi, Zhenzhen, Salas-Leiva, Joan S., Gallot-Lavallée, Lucie, Williams, Shelby K., Kops, Geert J.P.L., Archibald, John M., Simpson, Alastair G.B., Roger, Andrew J., Hubrecht Institute with UMC, Salas-Leiva, Dayana E., Tromer, Eelco C., Curtis, Bruce A., Jerlström-Hultqvist, Jon, Kolisko, Martin, Yi, Zhenzhen, Salas-Leiva, Joan S., Gallot-Lavallée, Lucie, Williams, Shelby K., Kops, Geert J.P.L., Archibald, John M., Simpson, Alastair G.B., and Roger, Andrew J.

Published
2021

31. Genomic analysis finds no evidence of canonical eukaryotic DNA processing complexes in a free-living protist

Author

CMM, Hubrecht Institute with UMC, Salas-Leiva, Dayana E., Tromer, Eelco C., Curtis, Bruce A., Jerlström-Hultqvist, Jon, Kolisko, Martin, Yi, Zhenzhen, Salas-Leiva, Joan S., Gallot-Lavallée, Lucie, Williams, Shelby K., Kops, Geert J.P.L., Archibald, John M., Simpson, Alastair G.B., Roger, Andrew J., CMM, Hubrecht Institute with UMC, Salas-Leiva, Dayana E., Tromer, Eelco C., Curtis, Bruce A., Jerlström-Hultqvist, Jon, Kolisko, Martin, Yi, Zhenzhen, Salas-Leiva, Joan S., Gallot-Lavallée, Lucie, Williams, Shelby K., Kops, Geert J.P.L., Archibald, John M., Simpson, Alastair G.B., and Roger, Andrew J.

Published
2021

38. A free-living protist that lacks canonical eukaryotic DNA replication and segregation systems

Author

Salas-Leiva, Dayana E., primary, Tromer, Eelco C., additional, Curtis, Bruce A., additional, Jerlström-Hultqvist, Jon, additional, Kolisko, Martin, additional, Yi, Zhenzhen, additional, Salas-Leiva, Joan S., additional, Gallot-Lavallée, Lucie, additional, Kops, Geert J. P. L., additional, Archibald, John M., additional, Simpson, Alastair G. B., additional, and Roger, Andrew J., additional

Published
2021
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47. Taxonomy, Morphology and Phylogeny of a New Oligotrich Ciliate-Omegastrombidium hongkongense n. sp (Protozoa: Ciliophora) from Clear Water Bay, Hong Kong

Author

Shen, Zhuo, Liu, Weiwei, Zhang, Shuwen, Yi, Zhenzhen, Liu, Hongbin, Shen, Zhuo, Liu, Weiwei, Zhang, Shuwen, Yi, Zhenzhen, and Liu, Hongbin

Abstract

One new marine oligotrich ciliate, Omegastrombidium hongkongense n. sp., was isolated from a bloom of Noctiluca scuntillans near Port Shelter, Hong Kong. The morphology and infraciliature of this new species were studied on both living and protargol-stained specimens. Its phylogenetic position was discussed based on the sequence of the small subunit rRNA gene. O. hongkongense is different from its congeners with special characters. The cells are usually heart-shaped, and the cell size usually is (20-35) x (20-30) mu m in vivo. Its deep buccal cavity extends obliquely to about 1/2 of cell length. It shows prominent apical protrusion. The adoral zone of membranelles is divided into 17-19 collar membranelles and four buccal membranelles. It has one ball-like macronucleus. The girdle kinety forms a closed loop which obliquely surrounds the body. The ventral kinety and thigmotactic membranelles are not observed. The SSU rRNA sequence of O. hongkongense was close to those of Strombidium paracalkinsi and Varistrombidium kelum with approximately 99% similarity. In the phylogenetic trees, O. hongkongense can be grouped with O. elegans and V. kielum species with very low support (16% ML).

Published
2018

48. Concatenated data and dense taxon sampling clarify phylogeny and ecological transitions within Hypotricha.

Author

Xu, Jiahui, Wilkinson, Mark, Chen, Miaoying, Zhang, Qi, Yang, Ran, and Yi, Zhenzhen

Subjects
PHYLOGENY, RECOMBINANT DNA, ENVIRONMENTAL soil science
Abstract

Ciliates are single‐cell eukaryotes playing important roles in various ecosystems. Phylogenetic relationships within Hypotricha, one of the most polymorphic and highly derived ciliate groups, remain uncertain. Previous studies suggested that low genetic divergence might be the reason for poorly supported SSU rDNA tree topologies, despite the high morphological diversity of this group. In this study, we substantially increase the number of available hypotrich LSU rDNA gene sequences by the addition of 857 environmental sequences, and we investigate whether a more divergent gene and dense taxon sampling could better resolve the phylogeny of Hypotricha and shed light on the patterns of ecological transitions in the evolutionary history of the group. Pairwise distances of LSU rDNA sequences are generally higher than those for SSU rDNA within each order of Hypotricha, and both concatenated rDNA and LSU rDNA trees provide more resolution for hypotrich phylogenetics. Three traditional (morphology based) hypotrich orders, Stichotrichida, Sporadotrichida and Urostylida, are polyphyletic, but a monophyletic core Urostylida are found in our trees. A brackish/marine environment is inferred as ancestral within Hypotricha, with subsequent ecological diversification into freshwater, soil environments before the origin of major clades and some transitions back to the marine. However, inferred ecological transitions in Hypotricha are influenced by genes, methods and taxa. [ABSTRACT FROM AUTHOR]

Published
2021
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49. Beyond the 'Code': A Guide to the Description and Documentation of Biodiversity in Ciliated Protists (Alveolata, Ciliophora)

Author

Fox Ramos, Alexander, Alcover, Charlotte, Evanno, Laurent, Litaudon, Marc, DUPLAIS, Christophe, Bernadat, Guillaume, Gallard, Jean-Francois, Jullian, Christophe, Mouray, Elisabeth, Loiseau, Philippe, Pomel, Sébastien, Poupon, Erwan, Champy, Pierre, Beniddir, Mehdi, Ortiz, Sergio, Dali-Yahia, Kamel, Vásquez-Ocmín, Pedro, Grougnet, Raphäel, Grellier, Philippe, Michel, Sylvie, Maciuk, Alexandre, Boutefnouchet, Sabrina, Warren, Alan, Patterson, David, Dunthorn, Micah, Clamp, John, Achilles-Day, Undine E.M., Aescht, Erna, Al-Farraj, Saleh, Al-Quraishy, Saleh, Al-Rasheid, Khaled, Carr, Martin, Day, John, Dellinger, Marc, El-Serehy, Hamed, Fan, Yangbo, Gao, Feng, Gao, Shan, Gong, Jun, Gupta, Renu, Hu, Xiaozhong, Kamra, Komal, Langlois, Gaytha, Lin, Xiaofeng, Lipscomb, Diana, Lobban, Christopher, Luporini, Pierangelo, Lynn, Denis, Ma, Honggang, Ma, Miroslav, Ma, Jacqueline, Ma, Seema, Ma, Robert, Ma, Mercedes, McMiller, Nettie, Montagnes, David, Nikolaeva, Svetlana, Ong'ondo, Geoffrey Odhiambo, Ma, Blanca, Purushothaman, Jasmine, Ma, Pablo, Rotterová, Johana, Ma, Luciana, Shao, Chen, Shen, Zhuo, Shi, Xinlu, Ma, Weibo, Stoeck, Thorsten, La Terza, Antonietta, Vallesi, Adriana, Ma, Mei, Weisse, Thomas, Wiackowski, Krzysztof, Wu, Lei, Xu, Kuidong, Yi, Zhenzhen, Zufall, Rebecca, Agatha, Sabine, Équipe 'Pharmacognosie-Chimie des Substances Naturelles' BioCIS, Centre National de la Recherche Scientifique (CNRS), Institut de Chimie des Substances Naturelles (ICSN), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Équipe 'Molécules Fluorées et Chimie Médicinale' BioCIS, Molécules de Communication et Adaptation des Micro-organismes (MCAM), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Équipe 'Chimiothérapie Antiparasitaire' BioCIS, Universitat d'Alacant, Laboratorios de Investigación y Desarrollo (LID), Universidad Peruana Cayetano Heredia (UPCH), Chimie Organique, Médicinale et Extractive et Toxicologie Expérimentale (COMETE - UMR 8638), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Paris Descartes - Paris 5 (UPD5), Equipe Pharmacognosie (UMR 8638), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Paris Descartes - Paris 5 (UPD5)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Paris Descartes - Paris 5 (UPD5), National History Museum of London, Department of ecology, Universität Kaiserslautern, Austrian Museum, University of Huddersfield, Computer Science Department [Boston] (Boston University), Boston University [Boston] (BU), Laboratoire de Mecanique des Fluides et d'Acoustique (LMFA), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Wuhan University [China], Institut Charles Sadron (ICS), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), School of Biological Sciences [Liverpool], University of Liverpool, Shandong University, Institutions et Dynamiques Historiques de l'Économie et de la Société (IDHES), Ecole Normale Supérieure Paris-Saclay (ENS Paris Saclay)-Université d'Évry-Val-d'Essonne (UEVE)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Nanterre (UPN)-Université Paris 8 Vincennes-Saint-Denis (UP8)-Université Paris 1 Panthéon-Sorbonne (UP1), Universität Salzburg, Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Paris Descartes - Paris 5 (UPD5)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Paris Descartes - Paris 5 (UPD5)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris 8 Vincennes-Saint-Denis (UP8)-Université Paris Nanterre (UPN)-Université d'Évry-Val-d'Essonne (UEVE)-Centre National de la Recherche Scientifique (CNRS)-Ecole Normale Supérieure Paris-Saclay (ENS Paris Saclay), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Laboratorio de Enfermedades Infecciosas, Laboratorios de Investigacion y Desarrollo, Universidad Peruana Cayetano Heredia-FACULTAD DE CIENCIAS Y FILOSOFIA, Université Paris Descartes - Paris 5 (UPD5)-Centre National de la Recherche Scientifique (CNRS), Université Paris Descartes - Paris 5 (UPD5)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Bio Sci, Univ Liverpool, and École normale supérieure - Cachan (ENS Cachan)-Université Panthéon-Sorbonne (UP1)-Université Paris 8 Vincennes-Saint-Denis (UP8)-Université Paris Nanterre (UPN)-Centre National de la Recherche Scientifique (CNRS)-Université d'Évry-Val-d'Essonne (UEVE)

Subjects
0301 basic medicine, Databases, Factual, Cultivation, Best practice, [SDV]Life Sciences [q-bio], Biodiversity, Invertebrados, [SDV.BID]Life Sciences [q-bio]/Biodiversity, Biology, Q1, Microbiología, Microbiology, GeneralLiterature_MISCELLANEOUS, taxonomy, 03 medical and health sciences, Documentation, morphology, Ciliophora, systematics, QH426, Phylogeny, molecular phylogeny, ComputingMilieux_MISCELLANEOUS, Grand Challenges, International research, Internet, Ecology, business.industry, Online database, Original Articles, Data science, type specimens, phylogenetics, Metadata, 030104 developmental biology, cultivation, Knowledge base, Original Article, nomenclature, business, information resources
Abstract

© 2017 The International Society of Protistologists.Recent advances in molecular technology have revolutionized research on all aspects of the biology of organisms, including ciliates, and created unprecedented opportunities for pursuing a more integrative approach to investigations of biodiversity. However, this goal is complicated by large gaps and inconsistencies that still exist in the foundation of basic information about biodiversity of ciliates. The present paper reviews issues relating to the taxonomy of ciliates and presents specific recommendations for best practice in the observation and documentation of their biodiversity. This effort stems from a workshop that explored ways to implement six Grand Challenges proposed by the International Research Coordination Network for Biodiversity of Ciliates (IRCN-BC). As part of its commitment to strengthening the knowledge base that supports research on biodiversity of ciliates, the IRCN-BC proposes to populate The Ciliate Guide, an online database, with biodiversity-related data and metadata to create a resource that will facilitate accurate taxonomic identifications and promote sharing of data.

Published
2017
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