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Biosystematic studies on Adenophora potaninii ***(Campanulaceae) V.A taxonomic treatment

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Journal of Systematics and Evolution 2010年第6期48卷 445-454页

作者： Song GE De-Yuan HONG(State key laboratory of Systematic and Evolutionary Botany,Institute of Botany,chinese academy of sciences,beijing 100093,china) (State key laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China)

Adenophora is an extremely variable genus,and its taxonomy is very *** the genus,Adenophora potaninii complex,including ***,***,***,***,***,***,and *** ***,is a typical group with different taxonomical treatments due to high level of morphological *** carried out extensive biosystematic studies based on population sampling,transplantation experiments and offspring tests,cluster analysis,and a crossing *** results reveal four main findings.(i) Leaf forms of the *** complex were extremely polymorphic;the leaf form of *** and ***,and that of *** and *** could be found,respectively,on a single population or among the offsprings of a single plant.(ii) Cluster analysis and a crossing experiment indicated that *** and *** could not be separated from ***,nor *** from ***.(iii) Adenophora potaninii and *** were gradational in morphology and their compatibility value was slightly reduced compared to that within each entity.(iv) Adenophora lobophylla was distinct from the other members of the complex in shape and size of corolla,relative length of style,and shape of *** species was incompatible reproductively with the other members of the complex,but partly compatible with ***,a species in another ***,we recognized only one species with two subspecies in the complex,*** *** and ***,moved *** out of the complex,and reduced all the other names as new synonyms.

关键词： Adenophora potaninii biosystematics populations species complex taxonomy.

Transgenic expression of DwMYB2 impairs iron transport from root to shoot in Arabidopsis thaliana

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Cell Research 2006年第10期16卷 830-840页

作者： Yan-Hong Chen~(1,2,3) Xue-Min Wu~5 Hong-Qing Ling~4 Wei-Cai Yang~1 ~1The key laboratory of Molecular and Developmental Biology,Institute of Genetics and Developmental Biology,chinese academy of sciences,beijing 100101 china ~2Graduate University of the chinese academy of sciences,19 Yuquan Road,beijing 100049,china ~3School of Life Science,Nantong University,Nantong 226007 china ~4The State key laboratory of Plant Cell and Chromosome Engineering,Institute of Genetics and Developmental Biology,chinese academy of sciences,beijing 100101,china The key laboratory of Molecular and Developmental Biology Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing China Graduate University of the chinese academy of sciences Beijing China School of Life Science Nantong University Nantong China Department of Botany University of British Columbia 6270 University Blvd. Vancouver Canada The State key laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing China

In plant,iron uptake and homeostasis are tightly regulated to ensure its absorption from soil and to avoid excessiron in the *** genes involved in this process have been identified during past several years,but there are manyproblems remain unsolved in the genetic regulation of whole plant iron trafficking and *** transcriptionfactors contain tandem repeats of a～50 amino acid DNA-binding motif (R) and are involved in the regulation of manyaspects of plant development,hormone signaling and ***,we report that the ectopic expression of orchidR2R3-MYB gene DwMYB2 in Arabidopsis thaliana confers the transgenic plants hypersensitivity to iron *** DwMYB2 transgenic plants,the iron content in root is two-fold higher compared to that in wild-type root,while thereverse is true in *** imbalance of iron content in root and shoot suggested that the translocation of iron fromroot to shoot was affected by the expression of DwMYB2 in the transgenic ***,gene chip and reversetranscription-polymerase chain reaction analysis revealed that the ferric-chelate reductase gene,AtFRO2,and the irontransporter gene,AtIRT1 and AtIRT2,are up-regulated by DwMYB2 expression,while other potential iron transporterssuch as AtIREG1,AtFRD3 and NRAMP1 are *** addition,the expression of several putative peptidetransporters and transcription factors are also altered in the 35S::DwMYB2 transgenic *** data provide us insightinto the whole plant translocation of iron and identify candidate genes for iron homeostasis in plants despite the fact thata heterologous gene was expressed.

关键词： DwMYB2 iron uptake and homeostasis iron transporters Arabidopsis

ON THE ERROR ESTIMATE OF LINEAR FINITE ELEMENT APPROXIMATION TO THE ELASTIC CONTACT PROBLEM WITH CURVED CONTACT BOUNDARY

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Journal of Computational Mathematics 2000年第6期18卷 561-566页

作者： Lie-heng Wang (State key laboratory of Scientific and Engineering Computing, Institute of Computational Mathematics, academy of Mathematics and System sciences, chinese academy of sciences, beijing 100080, china) 中科院计算数学所科学与工程计算国家重点实验室北京 100080

In this paper, the linear finite element approximation to the elastic contact problem with curved contact boundary is considered. The error bound O(h[sup ?]) is obtained with requirements of two times continuously differentiable for contact boundary and the usual regular triangulation, while *** et. al. Obtained the error bound O(h[sup ?]) with requirements of three times continuously differentiable for contact boundary and extra regularities of triangulation (c.f. [2]). [ABSTRACT FROM AUTHOR]

关键词： contact problem finite element approximation

A 12-bit multichannel ADC for pixel detectors in particle physics and nuclear imaging

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Science china(Technological sciences) 2010年第5期53卷 1208-1214页

作者： WEI Wei1,2,3,WANG Zheng1,3 & ZHAO JingWei1,3 1 Institute of High Energy Physics,chinese academy of sciences,beijing 100049,china 2 Graduate University of chinese academy of sciences,beijing 100049,china 3 key Lab of Nuclear Detection Technology and Nuclear Electronics of chinese academy of sciences,beijing 100049,china Institute of High Energy Physics Chinese Academy of Sciences Beijing China Graduate University of chinese academy of sciences Beijing China key Lab of Nuclear Detection Technology and Nuclear Electronics of chinese academy of sciences Beijing China

Modern pixel detectors in nuclear and particle physics experiments and also in nuclear imaging,starve for highly integrated application specified integrated circuit(ASIC),whereas in china the study of ASIC still stays far away from practical *** lack of ASIC strictly limits the research and development of domestic high energy physics field.A 12-bit multichannel ADC designed for high density readout is introduced as a major candidate for solution.A precise model is discussed and the simulation fully agrees with the model,which indicates a key principle of *** is performed according to the given rule,and novel layout techniques are carried *** results in all aspects are also obtained,showing an excellent real performance,which satisfies the practical requirement.

关键词： application specified integrated circuit high density readout Wilkinson ADC multi-channel ADC

BUD2,encoding an S-adenosylmethionine decarboxylase,is required for Arabidopsis growth and development

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Cell Research 2006年第5期16卷 446-456页

作者： Chunmin Ge~(1,2,*) Xia Cui~(1,2,*) Yonghong Wang~1 Yuxin Hu~3 Zhiming Fu~1 Dongfen Zhang~(1,2) Zhukuan Cheng~1 Jiayang Li~1 ~1State key laboratory of Plant Genomics and National Center for Plant Gene Research,Institute of Genetics and Developmental Biology,chinese academy of sciences,beijing 100101,china ~2Graduate School,chinese academy of sciences,beijing 100101,china ~3Institute of Botany,chinese academy of sciences,beijing 100093,china State key laboratory of Plant Genomics and National Center for Plant Gene Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing China Graduate School Chinese Academy of Sciences Beijing China Institute of Botany Chinese Academy of Sciences Beijing China

Polyamines are implicated in regulating various developmental processes in plants,but their exact roles and how theygovern these processes still remain *** report here an Arabidopsis bushy and dwarf mutant,bud2,which resultsfrom the complete deletion of one member of the small gene family that encodes S-adenosylmethionine decarboxylases(SAMDCs) necessary for the formation of the indispensable intermediate in the polyamine biosynthetic ***2 plant has enlarged vascular systems in inflorescences,roots,and petioles,and an altered homeostasis *** double mutant of bud2 and samdcl,a knockdown mutant of another SAMDC member,is embryo lethal,demonstrat-ing that SAMDCs are essential for plant *** results suggest that polyamines are required for the normalgrowth and development of higher plants.

关键词： BUD2 polyamines embryogenesis plant architecture Arabidopsis

Unsteady Numerical Simulation of Hot Streak/Blades Interaction and Film Cooling

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Journal of Thermal Science 2010年第5期19卷 402-409页

作者： Weilin Yi,Lucheng Ji and Yunhan Xiao Research Center for Energy and Power,chinese academy of sciences,beijing,china key laboratory of Advanced Energy and Power,chinese academy of sciences,(Institute of Engineering Thermophysics),beijing,china P.O.Box 2706,beijing 100190,china Research Center for Energy and Power Chinese Academy of Sciences Beijing China key laboratory of Advanced Energy and Power Chinese Academy of Sciences (Institute of Engineering Thermophysics) Beijing China beijing China

Deeply research on management and application of hot streak is an important way to breakthrough technique obstacle of aero engine hot *** method is a useful instrument to investigate the correlative *** the paper developed independently three dimensional unsteady parallel computational code-MpiTurbo based on Fortran 90 and MPI at Linux operating *** unsteady numerical simulation was carried out to investigate impacts of the factors,which included circumferential locations of hot streak and clocking positions of blade rows,on the thermal environment of a 1+1 counter-rotating *** results clearly indicated that clocking positions of hot streak/blade row and blade row/blade row had great influence on the time-averaged temperature distribution of the third blade ***,it can be effective for improving thermal environment of turbine to optimize blade parameters and clocking *** film cooling layout was designed by the repetitious steady simulation based on source term *** the flow structure detail was given by the unsteady simulation.

关键词： hot streak turbine parallel computation film cooling

A new species of Leptocycas (Zamiaceae) from the Upper Triassic sediments of Liaoning Province,china

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Journal of Systematics and Evolution 2010年第4期48卷 286-301页

作者： 1,2,3Jian-Wei ZHANG 2Jian-Xin YAO 1Jia-Rui CHEN 1Cheng-Sen LI 1(State key laboratory of Systematic and Evolutionary Botany,Institute of Botany,chinese academy of sciences,beijing 100093,china) 2(State key laboratory of Stratigraphy and Paleontology,Institute of Geology,chinese academy of Geological sciences,beijing 100037,china) 3(Graduate University,chinese academy of sciences,beijing 100049,china) (State key laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China) (State key laboratory of Stratigraphy and Paleontology Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China) (Graduate University Chinese Academy of Sciences Beijing 100049 China)

A new cycad,Leptocycas yangcaogouensis ***.,was found in sediments from the Late Triassic in western Liaoning,*** pinnately compound leaves(Pseudoctenis type)are screwed in a crown on the stem *** leaflets are linear,with parallel veins and decurrent bases on the *** leaf bases are *** cataphylls intermix with the *** female cone is ovoid in *** characteristics of the new plant are more similar to those of Leptocycas gracilis,a Triassic cycad from North America,but the new species differs from *** in the size of its stem(7–8 vs.3–5 cm in diameter,respectively),leaves(length×width 100×16 vs.30×7 cm,respectively)and leaf density along the stem(4–6 vs.1–2 bases/1 cm length,respectively).Both *** and ***,having leaves of the Pseudoctenis type,show a closer relationship to the extant Dioon of *** present study provides evidence for the origin of the genus Dioon,which may have come from Leptocycas plants of the *** would be assumed that the extent cycads in Zamiaceae originate from the pteridosperms in the Late Paleozoic and have evolved through the stage of *** and *** in Late Triassic,and reaching the extant Dioon.

关键词： china Cycadales Leptocycas Upper Triassic Zamiaceae

A revision of Clematis ***(Ranunculaceae)

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Journal of Systematics and Evolution 2009年第6期47卷 552-580页

作者： ~(1,2)Wen-Jing YANG ~1Liang-Qian LI~* ~3Lei XIE 1(State key laboratory of Systematic and Evolutionary Botany,Institute of Botany,chinese academy of sciences,beijing 100093,china) 2(Graduate University of chinese academy of sciences,beijing 100049,china) 3(Southwestern china Germplasm Bank of Wild Species,Kunming Institute of Botany chinese academy of sciences Kunming 650204,china) (State key laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China) (Graduate University of chinese academy of sciences Beijing 100049 China) (Southwestern china Germplasm Bank of Wild Species Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China)

Clematis *** is revised in this paper based on the examination of a large number of herbarium specimens,extensive field observations,and morphometric *** taxonomic history and geographical distribution of the section are given,the relationships among the species are discussed,and the evolutionary trends of some characters in the section are *** staminodes of the plants in this section may have evolved from the outer stamens with petaloid filaments and gradually disappearing ***,they may have evolved in two different *** possibility is that the staminodes elongate and become lanceolate,as long as sepals,and their apices turn into *** other is that the staminodes are spathulate,but not elongating,as long as stamens,and their apices turn into retuse from obtuse and *** evolutionary trend of sepals may be from thin to thick in texture,and the veins from non-prominent to *** a result,five new series are established and nine species, two subspecies and nine varieties(including three new ranks) are recognized in this *** identification key is provided,and each taxon is described and *** sibirica and Clematis ochotensis are treated as subspecies of Clematis alpina due to their subtle differences and lack of,or few,overlapping *** fusijamana and Clematisfauriei are recognized as varieties of *** *** for the continuous variation of the velutinous strips on the sepal *** iliensis is treated as variety of *** *** for the continuous variation of leaf division *** variations in sepal color and basal caruncle size support degrading Clematis chiisanensis as a variety of Clematis *** North American *** may be primitive,whereas *** may be the most advanced taxon in this *** and *** are closely related to each ***,the systematic position of se

关键词： Clematis sect.Atragene Ranunculaceae taxonomic revision

Mitochondrial membrane fusion and ATP synthesis both compete for interfacial △pH of PMF,but not △Ψ:An Inter-play between membrane fusion and energy coupling of mitochondria

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生物物理学报 2009年第S1期25卷 217-218页

作者： Shusen Liu State key laboratory of Biomembrane and Membrane Biotechnology, Instutute of Zoology, chinese academy of sciences, beijing, 100101, china

Although some fusogenic proteins have been established to tether two opposite outer or inner mitochondrial membranes into contact, a prerequisite for whole mitochondrial fusion events,

关键词： Mitochondrial membrane fusion Protein-tethering Lipid-bilayer-mixing and fusion Interfacial △pH of PMF.Inter-play between membrane fusion and ATP synthesis.