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A New Diverse Macrofossil Lagersttte from the Uppermost Ediacaran of Southwestern China

Acta Geologica Sinica(English Edition) 2008年第6期82卷 1095-1103页

作者： TANG Feng YIN Chongyu LIU Pengju GAO Linzhi zhang wenyan Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 Key Laboratory of Stratigraphy and Paleontology Chinese Academy of Geological Sciences Beijing 100037 China Travel Service Head Office Beijing 100081

A new macrofossil Lagerstatte was discovered from the uppermost Ediacaran Jiucheng Member at Jinning and Jiangchuan of the eastern Yunnan, yielding numerous diverse well-preserved thallophyte macrofossils. These include the previously-known representatives of vendobionts, Vendotaenia and Tyrasotaenia, and the biggish multicellular benthos such as Chuaria-like and Tawuia- like fossiis, as well as Longfengshaniaceaens with diverse holdfast structures. There are still some other problematic macrofossils with peculiar configurations as well as uncertain relatives. The distinct dominance of the giant, unbranching thallophytes occasionally with holdfast structures distinguishes this assemblage from the other Ediacaran macrofossil Lagerstattes in the Doushantuo Formation at Miaohe, Wenghui and Lantian, and the contemporary assemblage in the Shibantan Member of Dengying Formation, Yangtze Gorges area. This paper outlines the characteristics of some of the multicellular macrofossils from the Jiucheng Member at Jiangchuan. They include some macrofossils with different types of holdfast structure, larger Chuaria-like and Tawuia-like morphology and questionable affinities as well. The discovery of greater diverse macrofossil assemblages from the Jiucheng Member of eastern Yunnan has further indicated that an important diversification and evolutionary radiation of metaphytes took place in the latest Ediacaran time. This radiation of largescale, benthic metaphyte along with phytoplankton was likely important contributors to the early Cambrian explosion of metazoans.

关键词： eastern Yunnan Late Ediacaran Jiucheng Member diverse macrofossils

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Genomic analysis of a pure culture of magnetotactic bacterium Terasakiella ***-1

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Journal of Oceanology and Limnology 2021年第6期39卷 2097-2106页

作者： Haijian DU wenyan zhang Wei LIN Hongmiao PAN Tian XIAO Long-Fei WU College of Life Science Shandong UniversityQingdao 266237China CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Institutions of Earth Science Chinese Academy of SciencesBeijing 100029China France-China Joint Laboratory for Evolution and Development of Magnetotactic Multicellular Organisms Chinese Academy of SciencesBeijing 100029China Aix-Marseille University CNRSLCBMarseille F-13402France

Magnetotactic bacteria(MTB)display magnetotaxis ability because of biomineralization of intracellular nanometer-sized,membrane-bound organelles termed *** having been discovered more than half a century,only a few representatives of MTB have been isolated and cultured in the *** this study,we report the genomic characterization of a novel marine magnetotactic spirillum strain SH-1 belonging to the genus Terasakiella that was recently isolated.A gene encoding haloalkane dehalogenase,which is involved in the degradation of chlorocyclohexane,chlorobenzene,chloroalkane,and chloroalkene,was ***-1 genome contained cysCHI and soxBAZYX genes,thus potentially capable of assimilatory sulfate reduction to H_(2)S and using thiosulfate as electron donors and oxidizing it to *** of SH-1 also contained genes encoding periplasmic dissimilatory nitrate reductases(napAB),assimilatory nitrate reductase(nasA)and assimilatory nitrite reductases(nasB),suggesting that it is capable of gaining energy by converting nitrate to *** pure culture of Terasakiella ***-1 together with its genomic results off ers new opportunities to examine biology,physiology,and biomineralization mechanisms of MTB.

关键词： magnetotactic bacteria magnetotaxis pure culture comparative genomic analysis

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ATP1B3 Restricts Hepatitis B Virus Replication Via Reducing the Expression of the Envelope Proteins

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Virologica Sinica 2021年第4期36卷 678-691页

作者： Jun zhang Tianhang Zheng Xiaolei Zhou Hong Wang Zhaolong Li Chen Huan Baisong Zheng wenyan zhang Institute of Virology and AIDS Research the First Hospital of Jilin UniversityChangchun 130021China

Our recent study reported that ATP1B3 inhibits hepatitis B virus(HBV)replication via inducing NF-κB ***,ATP1B3 mutants which were defective in NF-κB activation still maintained the moderate degree of suppression on HBV replication,suggesting that another uncharacterized mechanism is also responsible for ATP1B3-mediated HBV ***,we demonstrated that ATP1B3 reduced the expression of HBV envelope proteins LHBs,MHBs and SHBs,but had no effect on intracellular HBV DNA,RNA levels as well as HBV promoter *** investigation showed that proteasome inhibitor MG132 rescued ATP1B3-mediated envelope proteins degradation,demonstrating that proteasome-dependent pathway is involved in ATP1B3-induced degradation of envelope ***-IP showed that ATP1B3 interacts with LHBs and MHBs and induces LHBs and MHBs *** colocalization analysis confirmed LHBs and MHBs colocalized with ATP1B3 *** work provides important information for targeting ATP1B3 as a potential therapeutic molecule for HBV infection.

关键词： ATP1B3 Hepatitis B virus(HBV) Envelope proteins Proteasome-dependent degradation

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A Rapid, Non-invasive Method for Anatomical Observations of Tadpole Vertebrae in Vivo

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Asian Herpetological Research 2018年第2期9卷 99-109页

作者： Guocheng SHU Shan XIONG wenyan zhang Jianping JIANG Cheng LI Feng XIE Chengdu Institute of Biology Chinese Academy of Sciences Chengdu 610041 China University of Chinese Academy of Sciences Beijing 100049 China

The tadpole is a critical stage in the amphibian life cycle and plays an important role during the transition from the aquatic to the terrestrial stage. However, there is a large gap in tadpole research, which represents a vital component of our understanding of the diversity and complexity of the life history traits of amphibians, especially their developmental biology. Some aspects of this gap are due to limited research approaches. To date, X-ray microcomputed tomography （micro-CT） has been widely used to conduct osteology research in adult amphibians and reptiles, but little is known about whether this tool can be applied in tadpole studies. Thus, we compared the results of two methods （the bone-cartilage double-staining technique and micro-CT） to study vertebrae in tadpole specimens. The results revealed no significant difference between the two methods in determining the number of vertebrae, and micro-CT represents a rapid, non-invasive, reliable method of studying tadpole vertebrae. When scanning tadpoles, voltage is the most critical of the scanning parameters （voltage, current and scan time）, and moderate scanning parameters are recommended. In addition, micro-CT performed better using specimens stored in 70% ethanol than those preserved in 10% formalin. Finally, we suggest that micro-CT should be more widely applied in herpetological research to increase specimen utilization.

关键词： micro-CT bone-cartilage double-stain tadpole vertebrae

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Improving tensile-shear properties of friction stir lap welded dissimilar Al/Mg joints by eliminating hook defect and controlling interfacial reaction

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Chinese Journal of Aeronautics 2023年第7期36卷 257-267页

作者： Yuqing MAO Ping YANG wenyan zhang Ning LI Hao NIE Danyang LIN Liming KE National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology Nanchang Hangkong UniversityNanchang 330063China

To improve tensile-shear properties of fiction stir lap welded(FSLW) dissimilar Al/Mg joints, pin-tip profiles were innovatively designed and welding speed was optimized, and effects of them on formation, interface microstructure and mechanical properties of different FSLW joints were investigated. With increasing the welding speed, the tensile-shear load of FSLW joints produced by three pins presents an increasing firstly and then decreasing trend. Compared with Rpin, the hook and hole defect in the joints made by S-pin and T-pin are eliminated owing to additional eccentric force. Moreover, the joints obtained by T-pin at 75 mm/min have the highest tensile-shear load, and a maximum value of 3.425 kN is produced, which increases by 96.8%.Meanwhile, the pin-tip profile improves significantly the interface reaction depending on the welding temperature. For R-pin, thick brittle intermetallic compounds of about 6.9 μm Al3Mg2and 13.3 μm Al12Mg17layers at the welding interface derived from diffusion reaction are formed, resulting in continuous cracks. However, using T-pin can raise the interface temperature, and which makes the interface liquefy locally to generate only 2.2 μm Al3Mg2layer and dispersive(Al12-Mg17+Mg) eutectic structure. This can release high residual stress and remove welding crack, consequently enhancing the interface properties of T-pin joints.

关键词： Dissimilar Al/Mg alloys Friction stir lap welding Hook defect Interface microstructure Tensile-shear properties

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Distribution characteristics of wave energy in the Zhe-Min coastal area

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Acta Oceanologica Sinica 2022年第5期41卷 163-172页

作者： Qin Ye Zhongliang Yang Min Bao Weiyong Shi Hongyuan Shi Zaijin You wenyan zhang Second Institute of Oceanography Ministry of Natural ResourcesHangzhou310012China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou310012China Ludong University Yantai264025China Dalian Maritime University Dalian116026China Institute of Coastal System Helmholtz-Zentrum HereonGeesthacht21502Germany

A 10-year(2003–2012)hindcast was conducted to study the wave field in the Zhe-Min coastal area(Key Area OE-W2)located off Zhejiang and Fujian provinces of *** by the wind field from a weather research and forecasting model(WRF),high-resolution wave modelling using the SWAN was carried out in the study *** simulated wave fields show a good agreement with *** the simulation results,we conducted statistical analysis of wave power density in terms of spatial distribution and temporal *** effective duration of wave energy in the sea area was discussed,and the stability of wave energy was evaluated using the coefficient of variation of wave power *** indicate that the wave energy resource in the study area was about 4.11×10^(6) *** distribution of wave energy tends to increase from the north(off Zhejiang coast)to the south(off Fujian coast),and from near-shore area to the open *** sea areas with wave power density greater than 2 kW/m are mostly distributed seaward of the 10-m isobath,and the contours of the wave power density are almost parallel to the *** sea areas around the islands that are far from the mainland are rich in wave energy,usually more than 6 kW/m,and therefore are of obvious advantages in planning wave energy development and *** effective duration of wave energy in the offshore area shows an increasing trend from north(off Zhejiang coast)to south(off Fujian coast),with values of∼3500 h in the north and∼4450 h in the *** coefficient of variation of wave energy in this region is mostly in the range of 1.5–3.0,and gradually decreases from the north to the south,suggesting that the wave energy in the south is more stable than that in the north.

关键词： SWAN model wave energy wave power density effective duration Zhe-Min coastal area

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Observations on a magnetotactic bacteria-grazing ciliate in sediment from the intertidal zone of Huiquan Bay,China

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Journal of Oceanology and Limnology 2021年第6期39卷 2053-2062页

作者： Si CHEN Kaixuan CUI wenyan zhang Yicong ZHAO Tian XIAO Hongmiao PAN Wuchang zhang Long-Fei WU CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China International Associated Laboratory of Evolution and Development of Magnetotactic Multicellular Organisms(LIA-MagMC) CNRS-CASQingdao 266071China Aix Marseille Univ CNRSLCBIM2BIMMMarseille 13009France

Magnetotactic bacteria(MTB)are a group of prokaryotes having the ability to orient and swim along geomagnetic field lines because they contain intracellular magnetosomes that are synthesized through a biomineralization *** have recently also been found in unicellular eukaryotes,which are referred to as magnetically responsive protists(MRPs).The magnetosomes have three origins in *** this study,we characterized a MTB-grazing ciliated MRP that was magnetically collected from intertidal sediment of Huiquan Bay,Qingdao,*** on 18S rRNA gene sequence analysis,the ciliated MRP was tentatively identified as Uronemella parafi lificum *** transmission electron microscopy,we observed that magnetosomes having 2-3 shapes were randomly distributed within this *** X-ray spectroscopy and high-resolution transmission electron microscopy images of the magnetosomes were consistent with them being composed of *** having the same shape and mineral composition were also detected in MTB that occurred in the same environment as the ciliated *** analysis showed that the size and shape of the magnetosomes in the ciliated MRP were similar to those in *** results suggest that this ciliated MRP can graze,ingest,and digest various types of *** is certainly worth noting that this is the first record of MRPs in Asian aquatic sediment and suggesting they might be widely *** results also support the assertion that MRPs probably contribute to the ecological cycles of iron,and expand possibilities for research into the mechanism of magnetoreception in eukaryotes.

关键词： magnetically responsive protist ciliate magnetotactic bacteria magnetosome graze magnetoreception

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Ectopic Expression of TRIM25 Restores RIG-I Expression and IFN Production Reduced by Multiple Enteroviruses 3Cpro

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Virologica Sinica 2021年第6期36卷 1363-1374页

作者： Huimin Xiao Jingliang Li Xu Yang Zhaolong Li Ying Wang Yajuan Rui Bin Liu wenyan zhang Institute of Virology and AIDS Research Key Laboratory of Organ Regeneration and Transplantation of The Ministry of EducationThe First Hospital of Jilin UniversityChangchun130021China Cancer Institute(Key Laboratory of Cancer Prevention and Intervention Ministry of Education)Second Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou310058China Department of Hand Surgery First Hospital of Jilin UniversityChangchun130021China Changchun Institute of Biological Products Co. LtdChangchun130012China

Enteroviruses(EVs) 3C proteins suppress type I interferon(IFN) responses mediated by retinoid acid-inducible gene I(RIG-I), while an E3 ubiquitin ligase, tripartite motif protein 25(TRIM25)-mediated RIG-I ubiquitination is essential for RIG-I antiviral activity. Therefore, whether the effect of EVs 3C on RIG-I is associated with TRIM25 expression is worth to be further investigated. Here, we demonstrate that 3C proteins of EV71 and coxsackievirus B3(CVB3) reduced not only RIG-I expression but also TRIM25 expression through protease cleavage activity, while overexpression of TRIM25 restored RIG-I expression and IFN-b production reduced by 3C proteins. Further investigation confirmed that the two amino acids and functional domains in TRIM25 required for RIG-I ubiquitination and TRIM25 structural conformation were essential for the recovery of RIG-I expression. Moreover, we also observed that TRIM25 could rescue RIG-I expression reduced by 3C proteins of CVA6 and EV-D68 but not CVA16. Our findings provide an insightful interpretation of 3C-mediated host innate immune suppression and support TRIM25 as an attractive target against multiple EVs infection.

关键词： 3C proteins RIG-I TRIM25 Innate immunity Enteroviruses(EVs)

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Relationships between altitudinal gradient and plant carbon isotope composition of grassland communities on the Qinghai-Tibet Plateau,China

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Science China Earth Sciences 2013年第1期56卷 311-320页

作者： ZHOU YongChun FAN JiangWen ZHONG HuaPing zhang wenyan Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences

Foliar and root carbon isotope composition(δ13C) of grassland communities on the Qinghai-Tibet Plateau,China,was obtained by the biomass weighting method and direct *** investigated the characteristics and altitudinal patterns of foliar and root δ13C and determined which environmental factors influenced foliar δ13 C *** δ13 C of alpine steppe was significantly higher than that of alpine meadow and temperate *** alpine meadow,root δ13C was significantly higher than of foliar δ*** δ13C increased with altitude at an average rate of 0.60‰ km 1 for the whole grassland *** rate was lower than that at species ***,there were no significant relationships between root δ13C and *** pressure was a more important factor than temperature and precipitation in its influence on the altitudinal pattern of foliar δ13C at the community level.

关键词： community level carbon isotope composition altitude atmospheric pressure temperature precipitation QinghaiTibet Plateau

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Characterization of uncultivated magnetotactic bacteria from the sediments of Yuehu Lake, China

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Acta Oceanologica Sinica 2017年第2期36卷 94-104页

作者： DU Haijian zhang Rui zhang wenyan XU Cong CHEN Yiran PAN Hongmiao ZHOU Ke WU Long-fei XIAO Tian Key Laboratory for Marine Ecology and Environmental Sciences Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology Qingdao 266071 China College of Resources and Environment Qingdao Agriculture University Qingdao 266109 China Aix Marseille Université CNRS LCB UMR 7257 Institut de Microbiologie de la Méditerranée Marseille F-13402 France University of Chinese Academy of Sciences Beijing 100049 China

Marine magnetotactic bacteria were collected from the intertidal sediments of Yuehu Lake（China）, where their abundance reached 103–104 ind./cm3. Diverse morphotypes of magnetotactic bacteria were observed, including cocci and oval, vibrio-, spirillum-, rod-, elliptical-, handle- and bar-shaped forms. The magnetococci were the most abundant, and had flagella arranged in parallel within a bundle. The majority of magnetosomes were arranged in one, two or multiple chains, although irregular arrangements were also evident. All the results of high-resolution transmission electron microscopy（HRTEM） analysis show that magnetosome crystals were composed of Fe3O4, and their morphology was specific to particular cell morphotypes. By the 16 S r RNA gene sequence analysis, we found fourteen operational taxonomic units（OTUs） which were related to magnetotactic bacteria. Among these, thirteen belonged to the Alphaproteobacteria and one to the *** with known axenic and uncultured marine magnetotactic bacteria, the 16 S r RNA gene sequences of most magnetotactic bacteria collected from the Yuehu Lake exhibited sequence identities ranging from 90.1% to96.2%（〈97%）. The results indicate that microbial communities containing previously unidentified magnetotactic bacteria occur in the Yuehu Lake.

关键词： magnetotactic bacteria magnetosome biodiversity Yuehu Lake intertidal sediments

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