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Phylogeny and species delimitation of the C-genome diploid species in Oryza

Journal of Systematics and Evolution 2011年第5期49卷 386-395页

作者： 1,2~Li-Li ZANG 1~Xin-Hui ZOU 1~Fu-Min ZHANG 3.4~Ziheng YANG 1,2~Song GE 1(State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,chinese academy of sciences,{3. 100093.China) 2(graduate university of the chinese academy of sciences,beijing 100049,China) 3.Department of Biology,university College London,London WC1E 6BT,United Kingdom) 4(Center for Computational and Evolutionary Biology,Institute of Zoology,chinese academy of sciences,{3. 100101,China) (State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China) (graduate university of the chinese {3. of sciences Beijing 100049 China) (Department of Biology University College London London WC1E 6BT United Kingdom) (Center for Computational and Evolutionary Biology Institute of Zoology Chinese Academy of Sciences Beijing 100101 China)

The diploid Oryza species with C-genome type possesses abundant genes useful for rice improvement and provides parental donors of many tetraploid species with the C-genome(BBCC,CCDD).Despite extensive studies,the phylogenetic relationship among the C-genome species and the taxonomic status of some taxa remain *** this study,we reconstructed the phylogeny of three diploid species with C-genome(Oryza officinalis,***,and ***) based on sequences of 68 nuclear single-copy *** obtained a fully resolved phylogenetic tree,clearly indicating the sister relationship of *** and ***,with *** being the more divergent *** phylogenies of the C-genome species found in previous studies might result from lineage sorting,introgression/hybridization and limited number of genetic markers *** further applied a recently developed Bayesian species delimitation method to investigate the species status of the Sri Lankan and African *** of two datasets(68 genes with a single sample,and 10 genes with multiple samples) support the distinct species status of the Sri Lankan and African *** addition,we evaluated the impact of the number of sampled individuals and loci on species *** simulation suggests that sampling multiple individuals is critically important for species delimitation,particularly for closely related species.

关键词： Bayesian species delimitation Oryza phylogeny taxonomy.

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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,{3. 100101 China ~2graduate university of the chinese academy of sciences,19 Yuquan Road,beijing 100049,China ~3.chool 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,{3. 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 {3. 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 3.S::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

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Monitoring the Cultivated Slope Land in the Three Gorges Reservoir Area Based on Remote Sensing and GIS

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Wuhan university Journal of Natural sciences 2006年第4期11卷 915-921页

作者： ZHOU Jieming1, ZHOU Qigang 2, 3.,HUANG Zhiqin 2, 3. 4 1. The Faculty of Geography and Resources Science, Sichuan Normal university, Chengdu 610066, Sichuan, China 2. Institute of Mountain Hazards and Environment, chinese academy of {3., Chengdu 610041, Sichuan, China 3. graduate university of the chinese academy of {3., beijing 100049, China 4. Information Center of Land and Resources Department of Sichuan Province, Chengdu 610041, Sichuan, China The Faculty of Geography and Resources Science Sichuan Normal University Chengdu Sichuan China Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu Sichuan China graduate university of the chinese {3. of sciences Beijing China Information Center of Land and Resources Department of Sichuan Province Chengdu Sichuan China

By means of combining auto-extraction with manual interpretation, the current distribution information about cultivated land is obtained. The distribution information of 1992 is extracted from the dynamic polygons of 2002. The monitoring mini-system of the cultivated slope land is established. In the system, detailed surveys, focused on the resources of cultivated slope land, are carried out. The results indicate that the area of the cultivated slope land is very large. Meanwhile, there are lots of cultivated steep slopes with gradient above 3.°. The areas of steep land cultivated had been slowly reduced from 1992 to 2002. At the same time, the pressures of returning farm land to forestry are great in all counties. The conflicts between population growth, insufficient grain supply and stagnant economic development sharpen increasingly. It is inevitable to improve the agricultural structure.

关键词： slope land cultivated remote sensing geography information system (GIS) the pressure of returning farm land to forestry Three Gorges Reservoir Area

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Autonomous satellite constellation orbit determination using the star sensor and inter-satellite links data

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Science China(Physics,Mechanics & Astronomy) 2010年第5期53卷 966-974页

作者： GAN QingBo1,2,MA JianBo1 & XU Jin1 1 Purple Mountain Observatory,chinese academy of sciences,Nanjing 210008,China 2 {3. university of chinese academy of sciences,beijing 100049,China Purple Mountain Observatory Chinese Academy of Sciences Nanjing China graduate university of chinese {3. of sciences Beijing China

A method of autonomous orbit determination for a satellite constellation using a star sensor combined with inter satellite links(ISLs) is *** types of simulated observation data,Three-Satellite Constellation ISLs and background stellar observations by a CCD star sensor,are first *** on these data,an observation equation is built for the constellation joint autonomous orbit determination,in which the simulations are *** accuracy of this method with different orbital determination models are analyzed and compared with regard to the effect of potential measurement *** results show that autonomous satellite constellation orbit determination using star sensor measurement and ISLs data is ***,this paper arrives at several conclusions which contribute to extending this method to a more general satellite constellation.

关键词： satellite constellation star sensor inter-satellite links autonomous orbit determination

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Semi-analytical analysis of the response of the air temperature over the land surface to the global vegetation distribution

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chinese Science Bulletin 2009年第14期54卷 2499-2505页

作者： LIU Fei1,2 & CHAO JiPing3.4 1 Institute of Atmospheric Physics, chinese academy of sciences, {3. 100029, China 2 graduate university of chinese academy of sciences, beijing 100049, China 3.National Marine Environmental Forecasting Center, {3. 100081, China 4 First Institute of Oceanography, State Oceanic Administration of China, Qingdao 266061, China Institute of Atmospheric Physics chinese academy of sciences Beijing China graduate university of chinese {3. of sciences Beijing China National Marine Environmental Forecasting Center Beijing China First Institute of Oceanography State Oceanic Administration of China Qingdao China

Response of the air temperature over the land surface to the global vegetation distribution is investigated, using a three-dimensional governing equation to simulate the steady, large-scale, limited amplitude perturbation of the free, inviscid and adiabatic atmosphere. The adoption of the static equation leads to a temperature governing equation in the terrain following coordinate. With the prescribed temperature as the upper boundary condition and the radiation balance as the lower boundary condition, the semi-analytical solution of the global circulation temperature can be calculated. In this article, only the air temperature (at 2 m height) over the land surface is analyzed, and the result suggests that this model can simulate the air temperature pattern over the land surface reasonably. A better simulation occurs when a simple feedback of the albedo on the temperature is included. Two sensitivity experiments are analyzed through this model. One suggests that the air temperature over the land surface descends obviously when the land surface is covered with ice all over, while another suggests that the air temperature rises a little when the land surface is covered with forest except the ice-covered area. This model appears to be a good tool to study the response of the air temperature to the vegetation distribution. Limitations of the model are also discussed.

关键词：空气温度植被分布陆地表面反应解析分析模拟模式控制方程边界条件

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Depside salts from Salvia miltiorrhiza improve myocardial microperfusion in rats using laser Doppler flowmetry

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Acta Pharmacologica Sinica 2007年第6期28卷 789-795页

作者： Xiao-fen LI~(2,3.,Yi-ping WANG~(2,4)~2 State Key Laboratory.of Drug Research,Shanghai Institute of Materia Medica,Shanghai Institutes for Biological sciences,chinese academyof sciences,Shanghai 201203.China,~3.graduate School of chinese academy of sciences,beijing 100049,China State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai China graduate School of chinese academy of {3. Beijing China

Aim:To investigate the effects of depside salts from Salvia miltiorrhiza on myo-cardial microperfusion and systemic hemodynamics in open-chest anaesthetizedSprague-Dawley ***:Myocardial microperfusion was measured bylaser Doppler flowmetry with a needle probe;cardiac output (CO) was determinedusing ultrasonic Doppler *** hemodynamic parameters,includingfemoral artery blood pressure,cardiac inotropy,and systemic vascular resistance(SVR) were simultaneously recorded by the PowerLab ***:Intrave-nous administration of S miltiorrhiza depside salts resulted in a significant imme-diate increase in CO and cardiac inotropy,but a fall in SVR.S miltiorrhiza depsidesalts (3. mg/kg and 60 mg/kg) promoted cardiac index (CI) by 12.2%±6.3. (P3.5% (P3.±2.9% (P3. mg/kgand 60 mg/kg S miltiorrhiza depside salts,***:Theseresults indicated that S miltiorrhiza depside salts improved myocardial micro-perfusion,as well as CO.

关键词： lithospermate B myocardial microperfusion laser Doppler flowmetry cardiac output ultrasonic Doppler flowmetry

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Molecular mechanism of dehydrin in response to environmental stress in plant

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Progress in Natural Science:Materials International 2007年第3期17卷 237-246页

作者： ZHANG Yuxiu , WANG Zi and XU Jin (Department of Bioengineering, School of Chemical and Environmental Engineering, China university of Mining and Technology (beijing), beijing 100083. China Department of Biology, {3. university of chinese academy of sciences, beijing 100049, China) Department of Bioengineering School of Chemical and Environmental Engineering China University of Mining and Technology (Beijing) Beijing 100083 China Department of Biology Graduate University Chinese Academy of Sciences Beijing 100049 China

Dehydrins, known as the D-11 subgroup of late embryogenesis abundant (LEA) protein, are an immunologically distinct family of proteins, which typically accumulate in desiccation-tolerant seed embryo or in vegetative tissues in response to various environmental stresses such as drought, salinity and freezing. The existence of conservative sequences designated as K, S, and Y segments is a structural feature of dehydrins, and the K segment found in all dehydrins represents a highly conserved 15 amino acid motif (EKKGIMDKIKEKLPG) and forms an amphiphilicα-helix. According to the arrangement of these domains and clustering analysis, dehydrins are subdivided into 5 subtypes: YnSK, Kn, KnS, SKn and YnK. Different types of dehydrins are induced by different environmental stress in plants. Study results showed that dehydrins might play important protective roles under abiotic stress via a number of different mechanisms, including improving or protecting enzyme activities by the cryoprotective activity in responding to freeze/thaw or dehydration; stabilizing vesicles or other endomembrane structures by function as the membrane stabilizer during freeze induced dehydration, and preventing the membrane system from the oxidative damage induced by reactive oxygen radicals as the radical scavenger. Here, the gene expression and molecular mechanisms of dehydrin in response to stress in plants are discussed.

关键词： dehydrin stress mechanism.

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IMPLICITIZATION USING UNIVARIATE RESULTANTS

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Journal of Systems Science & Complexity 2010年第4期23卷 804-814页

作者： Liyong SHEN Chunming YUAN School of Mathematical sciences Graduate University Chinese Academy of Sciences Beijing 100049 China Key Laboratory of Mathematics Mechanization Institute of Systems Science Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China

Among several implicitization methods, the method based on resultant computation is a simple and direct one, but it often brings extraneous factors which are difficult to remove. This paper studies a class of rational space curves and rational surfaces by implicitization with univaxiate resultant computations. This method is more efficient than the other algorithms in finding implicit equations for this class of rational curves and surfaces.

关键词： Implicitization rational space curves rational surfaces resultants.

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SiO/CNTs:A new anode composition for lithium-ion battery

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Science China Chemistry 2009年第12期52卷 2047-2050页

作者： REN YuRong1,2,3.,QU MeiZhen1 & YU ZuoLong1 1 Chengdu Institute of Organic Chemistry,chinese academy of sciences,Chengdu 610041,China 2 College of Chemistry,Jilin Normal {3.,Siping 13.000,China 3.graduate university of chinese academy of sciences,beijing 10003.,China Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu China College of Chemistry Jilin Normal University Siping China graduate university of chinese {3. of sciences Beijing China

A new anode composition SiO/CNTs (carbon nanotubes) has been prepared by chemical vapor deposition (CVD) method. The results of scanning electron microscopy (SEM) confirm that CNTs deposit on small SiO particles,form a cage,and enwrap SiO particles tightly. SiO/CNTs anode composition exhibits an initial discharge and charge capacity of 1171 and 789 mAh/g,and maintains a reversible capacity of 500 mAh/g after 80 cycles. The improvement of the cyclic performance for SiO/CNTs composition is related to the maintaining of the electric network during cycling,which benefits from a tight contact between CNTs and SiO particles.

关键词： SiO/CNTs CVD composition anode Li-ion battery

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The red damping wing of Gunn-Peterson trough in the high redshift GRBs

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Science China(Physics,Mechanics & Astronomy) 2009年第9期52卷 1428-1433页

作者： XU Zhou1,2 & WEI DaMing1,3.1 Purple Mountain Observatory, chinese academy of sciences, Nanjing 210008, China 2 {3. university of chinese academy of sciences, beijing 100012, China 3.Joint Center for Particle Nuclear Physics and Cosmology of Purple Mountain Observatory-Nanjing university, Nanjing 210008, China Purple Mountain Observatory Chinese Academy of Sciences Nanjing China graduate university of chinese {3. of sciences Beijing China Joint Center for Particle Nuclear Physics and Cosmology of Purple Mountain Observatory-Nanjing university Nanjing China

We calculate the red damping wing of Gunn-Peterson trough taking the evolution of the neutral fraction into consideration and take a clear look at the ionized region around the ionizing sources. We get the result that the damping wing flux feature is mainly determined by the neutral hydrogen outside the ionized bubble and the cut off in the damping wing would be useful to get the size of the ionized bubble. We also fit the red damping wing of the recently discovered high redshift GRB080913.and find that the ionized bubble is too small to create apparent cut off in the spectrum of this burst.

关键词： cosmology theory intergalactic medium gamma ray burst

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