检索结果-南通市图书馆

Morphology and Molecular Phylogeny of Two Little-Known Species of Loxodes, L. kahli Dragesco & Njiné, 1971 and L. rostrum Müller, 1786(Protist, Ciliophora, Karyorelictea)

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2019年第3期18卷 643-653页

作者： WANG Lun QU Zhishuai LI Song hu xiaozhong Institute of Evolution and Marine Biodiversity Key Laboratory of Mariculture Ministry of Education Ocean University of China

The morphology and phylogeny of two little-known species, Loxodes kahli Dragesco & Njiné, 1971 and L. rostrum Müller, 1786, isolated from freshwater muddy sediments in China, were investigated based on live features, infraciliature, and small subunit ribosomal DNA(SSU rD NA) sequence data. Loxodes kahli is distinguished from its congeners mainly by the number and arrangement of macronuclei(6-17 in one row) and the number of right somatic ciliary rows(11-26). The Chinese populations of L. kahli also exhibit differences with other populations in terms of the body size and the number of right ciliary rows. The characteristics of L. rostrum are consistent with those of previous studies except for the number of right ciliary rows(9-10). The studied species were redefined based on the new information and previous descriptions. This study also gave a brief morphological summary of the species in the genus Loxodes by an identification key. SSU rDNA sequence-based phylogenetic analyses revealed that both species are grouped with their congeners, supporting the monophyly of the genus Loxodes.

关键词： anaerobe benthic ciliate ciliature Loxodida SSU rDNA

From oral structure to molecular evidence:new insights into the evolutionary phylogeny of the ciliate order Sessilida(Protista,Ciliophora),with the establishment of two new families and new contributions to the poorly studied family Vaginicolidae

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2023年第7期66卷 1535-1553页

作者： Borong Lu xiaozhong hu Alan Warren Weibo Song Ying Yan Institute of Evolution&Marine Biodiversity Ocean University of ChinaQingdao266003China College of Fisheries Ocean University of ChinaQingdao266003China Department of Life Sciences Natural History MuseumLondonSW75BDUK Laoshan Laboratory Qingdao266237China

Ciliated protists represent one of the most primitive and diverse lineages of eukaryotes,with nuclear dimorphism,a distinctive sexual process(conjugation),and extensive genome *** divergent ciliate lineages,the peritrich order Sessilida includes members with a colonial lifestyle,which may hint to an independent evolutionary attempt for multicellularity,although they are still single-celled *** date,the evolution and phylogeny of this group are still far from clear,in part due to the paucity of molecular and/or morphological data for many *** this study,we extend taxon sampling of a loricate group of sessilids by obtaining 69 new r DNA(SSU r DNA,ITS1-5.8S rDNA-ITS2,and LSU r DNA)sequences from 20 wellcharacterized representative species and analyze the phylogenetic relationships within *** main findings are:(i)the genera Rhabdostyla and Campanella each represents a unique taxon at family level,supporting the establishment of two new families,i.e.,Rhabdostylidae *** Campanellidae ***.,respectively,the former being sister to a morphologically heterogeneous clade comprising Astylozoidae and several incertae sedis species and the latter occupying the basal position within the Sessilida clade;(ii)the structure of infundibular polykinety 3 is likely to be a phylogenetically informative character for resolving evolutionary relationships among sessilids;(iii)differences between sparsely and the densely arranged silverline systems could be a suprageneric taxonomic character;(iv)the monophyly of Vaginicolidae is confirmed,which is consistent with its specialized morphology,i.e.,the possession of a typical peritrich lorica which might be an apomorphy for this group;(v)within Vaginicolidae,the monotypic Cothurniopsis sensu Stokes,1893 is a synonym of Cothurnia Ehrenberg,1831,and a new combination is created,i.e.,Cothurnia valvata ***.;(vi)Vaginicola sensu lato comprises at least two distinctly divergent clades,one affiliated w

关键词： evolutionary hypotheses new families peritrich ciliates phylogeny protist

Redescription of five tintinnine ciliates (Alveolata: Ciliophora: Oligotrichea) from coastal waters of Qingdao, China

在线全文

学校读者我要写书评

暂无评论

Marine Life Science & Technology 2020年第3期2卷 209-221页

作者： Yang Bai Rui Wang Wen Song Toshikazu Suzuki xiaozhong hu Institute of Evolution and Marine Biodiversity&Key Laboratory of Mariculture Ministry of EducationOcean University of ChinaQingdao 266003China Marine College Shandong UniversityWeihai 264209.China Faculty of Fisheries Nagasaki University1-14 BunkyoNagasaki 852-8521Japan

Tintinnine ciliates are widely distributed around the world and are characterized by the possession of a lorica that is highly diverse in structure and *** the present study,five tintinni nes,namely Tintinnopsis ***,*** a Kofoid and Campbell,1929,*** Kofoid and Campbell,1929,Eutintinnus inflatus Marshall,1969,and Favella ehrenbergii(Claparede and Lachmann,1858)Jorgensen,1924,were collected from coastal waters of Qingdao,*** are newly recorded from China,i.e.,*** a,***,and *** morphology of the lorica and cell proper of all five species are described and compared with original and subsequent *** morphology in vivo of the lorica and cell proper of all five species are described and compared with original and subsequent *** addition,the ciliary patterns of *** and *** are revealed based on protargol-stained specimens.

关键词： Cell proper Lorica New record Tintinnina

Paracrine function amplifies pro-tumor electrochemical signal within neuron-glioma synapses

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2024年第6期67卷 1318-1320页

作者： Yan hu Peishan hu xiaozhong Peng Key Laboratory of Birth Defects and Related Diseases of Women and Children of MOE State Key Laboratory of BiotherapyWest China Second University HospitalSichuan UniversityChengdu 610041China Guangdong Institute of Gastroenterology Department of General SurgeryGuangdong Provincial Key Laboratory of Colorectal and Pelvic Floor DiseasesThe Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhou 510655China Department of Molecular Biology and Biochemistry Institute of Basic Medical SciencesMedical Primate Research CenterNeuroscience CenterChinese Academy of Medical SciencesSchool of Basic Medicine Peking Union Medical CollegeBeijing 100730China State Key Laboratory of Respiratory Health and Multimorbidity Institute of Basic Medical Sciences Chinese Academy of Medical SciencesSchool of Basic Medicine Peking Union Medical CollegeBeijing 100730China Institute of Laboratory Animal Science Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China

Neuronal activity plays a pivotal role in various physiological processes,including tissue development,homeostasis,and *** in recent years have improved our understanding of neuronal activity in brain cancers,such as glioblastoma(GBM)and diffuse midline gliomas(DMG),which are among the most prevalent and lethal cancers affecting children and ***,the neurons regulate brain cancers via two routes.

关键词： glioma homeostasis function

Morphological and molecular examination of the ciliate family Lagynusidae(Protista,Ciliophora,Prostomatea)with descriptions of two new genera and two new species from China

在线全文

学校读者我要写书评

暂无评论

Marine Life Science & Technology 2023年第2期5卷 178-195页

作者： Limin Jiang Congcong Wang Saleh A.Al-Farraj hunter N.Hines xiaozhong hu College of Fisheries and Key Laboratory of MaricultureMinistry of EducationOcean University of ChinaQingdao 266003China Institute of Evolution and Marine Biodiversity Ocean University of ChinaQingdao 266003China Department of Zoology College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Harbor Branch Oceanographic Institute Florida Atlantic UniversityFort PierceFL 34982USA

Ciliates in the class Prostomatea play an important role in the global microbial loop due to their signifcant abundances and broad feeding strategies at the foundation of food *** their importance in ecosystems,the taxonomy and systematics of this group of ciliates has long been poorly understood,with this being especially true for members of the family *** we examine four lagynusids collected from sandy beaches in China,using silver-staining and 18S rRNA gene sequencing *** investigations revealed two new genera and two new species and provided details for two little known forms:Penardella marina ***.,***.,Apolagynus cucumis(as reported by Penard.Études sur les infusoires d’eau *** and Cie,Genève,1922)***.,***.,Lagynus minutus ***.,and Lagynus elegans(Engelmann in Z Wiss Zool 11:347-393,1862)Quennerstedt(Acta Univ Lund 4:1-48,1867).Penardella *** be morphologically distinguished by having more than three dikinetidal perioral *** *** from the closely related genus Lagynus in the absence of a conspicuous neck-like *** ciliature of Apolagynus cucumis is revealed here for the frst time,which demonstrates the classifcation of this species within ***,Apolagynus binucleatus(Jiang et al.,2021)*** established according to the new *** results of our phylogenetic analyses based on the 18S rRNA gene support the establishment of two new genera and indicate that Lagynusidae is monophyletic,which further strengthens its valid taxonomic status.

关键词： Ciliate Morphology New genus New species Phylogeny 18S rRNA gene

First Record and Redefinition of the Qingdao Population of Marine Ciliate Cardiostomatella vermiformis (Kahl, 1928) Corliss, 1960 (Protozoa, Ciliophora)

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2007年第4期6卷 387-392页

作者： WANG Yangang hu xiaozhong LONG Hongan SONG Weibo Laboratory of Protozoology Ocean University of China Qingdao 266003 P. R. China

The living morphology and infraciliature of a marine ciliate, Cardiostomatella vermiformis isolated from a sand beach of the Jiaozhou Bay near Qingdao, China, were investigated by live observation, protargol and silver carbonate impregnation methods. Both the morphological and morphometric data largely agree with former records. Based on the data obtained, an improved diagnosis for Cardiostomatella vermiformis is supplied: Large marine Cardiostomatella with cylindrical body shape and several prolonged caudal cilia; cells in vivo about (90–500) μm×(30–120) μm; macronucleus beaded; single contractile vacuole caudally positioned; buccal apparatus conspicuously small, genus typical; three to six postoral kineties; 96-130 somatic kineties. This species is recorded for the first time in China.

关键词： morphology infraciliature Cardiostomatella vermiformis

Phylogeny of the anaerobic ciliate genus Sonderia(Protista:Ciliophora:Plagiopylea),including the description of three novel species and a brief revision of the genus

在线全文

学校读者我要写书评

暂无评论

Marine Life Science & Technology 2022年第4期4卷 493-512页

作者： Ran Li Wenbao Zhuang Xiaochen Feng Saleh A.Al-Farraj Alan Warren xiaozhong hu College of Fisheries &Key Laboratory of MaricultureMinistry of EducationOcean University of ChinaQingdao266003China Institute of Evolution and Marine Biodiversity Ocean University of ChinaQingdao266003China Zoology Department College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia Department of Life Sciences Natural History MuseumLondonSW75BDUK

Anaerobic protists in general,and ciliates in particular,are important components of anoxic or hypoxic environments,however,their diversity remains *** is a poorly studied genus that is distributed worldwide and is commonly found in anaerobic *** the present study,the taxonomy and phylogeny of three new species,namely Sonderia aposinuata ***.,Sonderia paramacrochilus *** Sonderia steini ***.,collected from China,were investigated based on microscopic observations and SSU rRNA gene sequencing *** aposinuata *** diagnosed mainly by having a relatively large body size,a crescent-shaped oral opening,numerous slender extrusomes,one suture on the ventral side and two on the dorsal side,and a buccal cavity that occupies the anterior third of the *** paramacrochilus *** resembles *** but differs mainly by its oral opening being located closer to the anterior cell margin and its spindle-shaped *** steini *** a freshwater species that can be recognized by its shallow buccal cavity,sparsely distributed rod-shaped extrusomes,and having 68–79 monokinetidal somatic kineties that form sutures on both sides of the *** analyses based on small subunit ribosomal RNA(SSU rRNA)gene sequence data support the monophyly of the family Sonderiidae,however,Sonderia is *** genus Sonderia is briefly revised and a key to the identification of species belonging to this genus is supplied.

关键词： Anaerobic ciliates Ciliature New species SSU rRNA gene Taxonomy

Divisional morphogenesis in the marine ciliate Anteholosticha manca (Kahl,1932) Berger,2003 (Ciliophora:Urostylida)

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2008年第2期27卷 157-163页

作者： LI Liqiong hu xiaozhong WARREN Alan AL- RASHEID Khaled A S AL- FARRAJ Saleh A SHAO Chen SONG Weibo Laboratory of Protozoology Key Laboratory of Maricuhure Ocean University of China Qingdao 266003 China Department of Zoology Natural History Museum London SW7 5BD UK Zoology Department King Saud University Riyadh 11451 Saudi Arabia

The cortical development and macronuclear evolution of the marine hypotrichous ciliate Anteholosticha manca, collected from the coastal waters near Qingdao, China, were investigated using the protargol impregnation method. The morphogenesis of A. manca is generally typical for the genus, and can be characterized as the following features ：（ 1 ） in the proter, a new oral primordium is formed on the bottom （beneath the pellicle） of the buccal cavity, disorganization of the parental undulating membranes do not contribute to the formation of this primordium ; （2） FVT-cirral anlagen in both dividers develop independently, and very likely only a few midventral cirri join in the formation of these primordia; （ 3 ） both marginal row and dorsal kinety anlagen develop intrakinetally within the parental structure; （4） at the middle stage, macronuclear segments fuse together to form a single mass as observed in most of its related forms.

关键词： hypotrichs marine ciliate morphogenesis Anteholosticha manca

Molecular Phylogenetic Lineage of Plagiopogon and Askenasia(Protozoa, Ciliophora) Revealed by Their Gene Sequences

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2015年第4期14卷 724-730页

作者： LIU An YI Zhenzhen LIN Xiaofeng hu xiaozhong Saleh A.AL-FARRAJ Khaled A.S.AL-RASHEID Laboratory of Protozoology Institute of Evolution & Marine Biodiversity Ocean University of China Laboratory of Protozoology School of Life Science South China Normal University Zoology Department College of Science King Saud University

Prostomates and haptorians are two basal groups of ciliates with limited morphological characteristics available for tax- onomy. Morphologically, the structures used to identify prostomates and haptorians are similar or even identical, which generate heavy taxonomic and phylogenetic confusion. In present work, phylogenetic positions lineage of two rare genera, Plagiopogon and Askenasia, were investigated. Three genes including small subunit ribosomal RNA gene （hereafter SSU rDNA）, internal transcribed spacer region （ITS region）, and large subunit ribosomal RNA gene （LSU rDNA） were analyzed, 10 new sequences five species each. Our findings included 1） class Prostomatea and order Haptorida are multiphyletic; 2） it may not be appropriate to place order Cyclotriehiida in subclass Haptoria, and the systematic lineage of order Cyclotrichiida needs to be verified further; 3） genus Plagio- pogon branches consistently within a clade covering most prostomes and is basal of clade Colepidae, implying its close lineage to Prostomatea; and 4） Askenasia is phylogenetically distant from the subclass Haptoria but close to classes Prostomatea, Plagiopylea and Oligohymenophorea. We supposed that the toxicyst of Askenasia may be close to taxa of prostomes instead of haptorians, and the dorsal brush is a more typical morphological characteristics of haptorians than toxicysts.

关键词： Plagiopogon Askenasia multi-gene phylogeny SSU rDNA ITS region LSU rDNA