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A Genome-wide Functional Characterization of Arabidopsis Regulatory Calcium Sensors in Pollen Tubes

Journal of Integrative Plant Biology 2009年第8期51卷 751-761页

作者： Liming Zhou1,2, Ying Fu1,2 and Zhenbiao Yang2,3 (1state key laboratory of Plant Physiology and Biochemistry, Department of Plant sciences, College of Biological sciences, china Agricultural University, beijing 100193, china 2china Agricultural University (CAU)-University of California, Riverside (UCR) Joint Center for Biological sciences and Biotechnology, College of Biological sciences, china Agricultural University, beijing 100193, china 3Center for Plant Cell Biology and Department of Botany and Plant sciences, University of California, Riverside, CA 92521, USA) state key laboratory of Plant Physiology and Biochemistry Department of Plant Sciences College of Biological Sciences China Agricultural University Beijing 100193 China china Agricultural University (CAU)‐University of California Riverside (UCR) Joint Center for Biological Sciences and Biotechnology College of Biological Sciences China Agricultural University Beijing 100193 China Center for Plant Cell Biology and Department of Botany and Plant sciences University of California Riverside CA 92521 USA)

Calcium, an ubiquitous second messenger, plays an essential and versatile role in cellular signaling. The diverse function of calcium signals is achieved by an excess of calcium sensors. Plants possess large numbers of calcium sensors, most of which have not been functionally characterized. To identify physiologically relevant calcium sensors in a specific cell type, we conducted a genome-wide functional survey in pollen tubes, for which spatiotemporal calcium signals are well-characterized and required for polarized tip growth. *** members of calrnodulin （CAM）, CaM-like （CML）, calcium-dependent protein kinase （CDPK） and calcineurin B-like protein （CBL） families were tagged with green fluorescence protein （GFP） and their localization patterns and overexpression phenotypes were characterized in tobacco pollen tubes. We found that several fusion proteins showed distinct overexpression phenotypes and subcellular localization patterns. CDPK24-GFP was localized to the vegetative nucleus and the generative cell/sperms. CDPK32-GFP caused severe growth depolarization. CBL2-GFP and CBL3-GFP exhibited dynamic patterns of subcellular localization, including several endomembrane compartments, the apical plasma membrane （PM）, and cytoskeleton-like structures in pollen tubes. Their overexpression also inhibited pollen tube elongation and induced growth depolarization. These putative calcium sensors are excellent candidates for the calcium sensors responsible for the regulation of calcium homeostasis and calciumdependent tip growth and growth oscillation in pollen tubes.

关键词： Arabidopsis calcium sensor calcium signaling Rho-related GTPase from plants subcellular localization tip growth

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Modeling of Dust Flux to Oceans from Asian Continent

Modeling of Dust Flux to Oceans from Asian Continent

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第三届中日韩气象学术会议

作者： Shen Yanbo~(1,2) Shi Guangyu~2 (1.laboratory for Climate Studies,National Climate Center,Center for Wind and Solar Energy Resources Assessment,china meteorological Administration,beijing,100081 2.state key laboratory of Numerical Modeling for Atmospheric sciences and Geophysical Fluid Dynamics(LASG),Institute of Atmospheric Physics,chinese academy sciences,beijing,100029)

＜正＞Plenty of dust aerosols are blown into atmosphere during the frequent Asian dust *** aerosols have not only direct and indirect climate effects through radiative processes,but also have important influences on the oceanic environment. As dust aerosols carrying nutriments like Fe fall into ocean,they will facilitate oceanic primary *** change in oceanic primary productivities will then cause the change in the flux ofradiatively active gases between ocean and atmosphere and result in the climate change *** the studying of these profound items, estimation of dust flux into oceans is an important *** this report,two schemes and relative observation data are combined to study the dust deposition flux and amount into seas near china from Asian continent during the spring of 2006.

关键词： Dust aerosol chinese Seas Deposition Flux Numerical simulation Aerosol Optical Depth

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Novel phased siRNA pathways in rice

Novel phased siRNA pathways in rice

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第十一届全国植物基因组学大会

作者： Xiaofeng Cao state 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

The osdcl4-1 mutant exhibits much more severe developmental defects than dcl4 in Arabidopsis, suggesting that Os DCL4 may process broader substrates in *** deep sequencing of small RNAs from different tissues of wild ...

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Analysis of the severe group dust storms in eastern part of Northwest china

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Journal of Geographical sciences 2002年第3期12卷 357-362页

作者： ZHOU Zijiang, WANG Xiwen(1. National meteorological Center, beijing 100081, china 2. Lanzhou Central meteorologicalObservatory, Lanzhou 730020, china) National meteorological Center 北京 100081 Lanzhou Central meteorological Observatory Lanzhou 730020

Based on the available original dust storm records from 60 meteorological stations, we discussed the identification standard of severe dust storms at a single station and constructed a quite complete time series of severe group dust storms in the eastern part of Northwest china in 1954–2001. The result shows that there were 99 severe group dust storms in this region in recent 48 years. The spatial distribution indicates that the Alax Plateau, most parts of the Ordos Plateau and most parts of the Hexi Corridor are the main areas influenced by severe group dust storms. In addition, the season and the month with the most frequent severe group dust storms are spring and April, accounting for 78.8% and 41.4% of the total events respectively. During the past 48 years the lowest rate of severe group dust storms occurred in the 1990s. Compared with the other 4 decades, on the average, the duration and the affected area of severe group dust storms are relatively short and small during the 1990s. In 2000 and 2001, there were separately 4 severe group dust storms as the higher value after 1983 in the eastern part of Northwest china.

关键词： eastern part of Northwest china severe group dust storms temporal and spatial distribution characteristics

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Deployment of Coal Bripettes and Improved Stoves:Pessibly an Option fer both Environment and Climate

Deployment of Coal Bripettes and Improved Stoves:Pessibly an...

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“2010年北京气象学会中青年优秀论文评选”学术研讨会

作者： GUORUI ZHI,~(+,++) CONGHU PENG,~(||) YTNGJUN CHEN,~(*,§) DONGYAN LTU,~§GUOYTNG SHENG,~(++) AND JIAMO FU~(++) key laboratory for Atmospheric Chemistry,Centre for Atmosphere Watch & Services of CAM,chinese academy of meteorological sciences,beijing 100081,china,state key laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,chinese academy of sciences, Guangzhou 510640,china,Yantai Institute of Coastal Zone Research for Sustainable Development,chinese academy of sciences,Yantai,Shandong Province 264003,china,and Department of Chemical and Environmental Engineering, Anyang Institute of Technology,Anyang, Henan Province 455000,china

The use of coal briquettes and improved stoves by chinese households has been encouraged bythe government as a means of reducing air pollution and health *** this study we have shown that these two improvements also relate to climate *** experimental measurements indicate that,if all coal were burned as briquettes in improved stoves,particulate matter(PM),organic carbon(0C),and black carbon(BC) could be annually reduced by 63±12%,61±10%,and 98±1.7%,***,the ratio of BC to 0C(BC/0C) could be reduced by about 97%,from 0.49 to 0.016,which would make the primary emissions of household coal combustion more optically ***,it is suggested that the government consider the possibility of:(i) phasing out direct burning of bituminous raw-coal-chunks in households;(ii) phasing out simple stoves in households;and,(iii) financially supporting the research,production,and popularization of improved stoves and efficient coal *** actions may have considerable environmental benefits by reducing emissions and mitigating some of the impacts of household coal burning on the climate. International cooperation is required both technologically and financially to accelerate the emission reduction in the world.

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Pollution characteristics of atmospheric fine particles and their secondary components in the atmosphere of Shenzhen in summer and in winter

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Science china Chemistry 2006年第5期49卷 466-474页

作者： NIU Yuwen1,2,HE Lingyan1,2,HU Min2,ZHANG Jing2 & ZHAO Yunliang2 1. Shenzhen Graduate School of Peking University,Shenzhen 518055,china 2. state Joint key laboratory of Environmental Simulation and Pollution Control,College of Environmental sciences,Peking University,beijing 100871,china Shenzhen Graduate School of Peking University Shenzhen China state Joint key laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences Peking University Beijing China

Two field measurements for atmospheric fine particles were conducted in Baoan district of Shenzhen during the summer and winter in 2004. Totally 30 sets of 24 h samples were collected, and then the mass concentrations and chemical compositions were determined. The seasonal varia- tions and secondary pollution characteristics of fine particles during the sampling periods were dis-cussed with meteorological factors. The results show that seasonal variations of atmospheric particles are significant in Shenzhen. The average mass concentrations of PM2.5 and PM10 in summer were 35 μg·m-3 and 57 μg·m-3, respectively, and those in winter were 99 μg·m-3 and 135 μg·m-3, respec-tively. The concentrations of both PM2.5 and PM10 in winter increased 184% and 137%, respectively, compared to those in summer. PM2.5 accounted for 61% and 75% of PM10 in summer and in winter, respectively, indicating severe fine particle pollution in Shenzhen. During the summer and winter sampling periods, the mean OC/EC ratios were 3.4 and 1.6, respectively. The estimated secondary organic carbon (SOC) averagely accounted for 56% and 6% of the total OC in summer and in winter, respectively, which implies a major contribution of SOC to OC in summer. During the continuous high temperature period in summer, both the concentrations and fractions of secondary aerosol compo-nents in PM2.5 were highly elevated, suggesting severe secondary pollution again. The prevailing wind was from South china Sea in summer, and the air quality was good. The prevailing wind in winter was from china's Mainland to the north, and the polluted air mass led to poor air quality.

关键词： PM2.5, mass concentration, secondary pollution, seasonal variation, Shenzhen.

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灾害天气国家重点实验室申报成功

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中国气象科学研究院年报 2004年第1期 10-12页

作者： state key laboratory of severe weather 灾害天气国家重点实验室

在中国气象局领导、国家科技部的大力支持和我院科技人员的共同努力下，2004年11月，中国气象科学研究院灾害天气国家重点实验室获准组建。

关键词：国家重点实验室灾害天气中国气象科学研究院申报中国气象局国家科技部科技人员

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X波段双偏振雷达水凝物粒子相态识别应用研究

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气候与环境研究 2018年第3期23卷 366-386页

作者：冯亮肖辉孙跃中国科学院大气物理研究所中国科学院云降水物理与强风暴重点实验室北京100029 中国科学院减灾中心北京100029 中国科学院大学北京100049

对云中水凝物粒子分类识别是双偏振雷达的主要应用之一。本文利用IAP-714XDP-A X波段双偏振雷达观测数据,在对其进行质量控制的基础上,利用滑动自适应订正算法对雷达反射率及差分反射率进行衰减订正,进而采用纹理参数SD(ZH)和SD(φDP)... 详细信息

对云中水凝物粒子分类识别是双偏振雷达的主要应用之一。本文利用IAP-714XDP-A X波段双偏振雷达观测数据,在对其进行质量控制的基础上,利用滑动自适应订正算法对雷达反射率及差分反射率进行衰减订正,进而采用纹理参数SD(ZH)和SD(φDP)区分气象回波与非气象回波,最后建立基于X波段双偏振雷达偏振参量(ZH、ZDR、KDP、ρHV)、环境温度T和纹理参数(SD(ZH)、SD(φDP))的模糊逻辑水凝物粒子分类识别算法。本文通过对2016年8月7日一次低仰角的观测,检验了纹理参数SD(ZH)和SD(φDP)对气象回波和非气象回波的识别效果,结果表明:SD(ZH)与SD(φDP)两者结合可有效区分气象回波和非气象回波;用2015年8月7日北京一次较大范围的降雹个例,对建立的模糊逻辑水凝物粒子分类识别算法进行效果验证,识别降雹落点与地面观测降雹落点一致,表明各种水凝物粒子对应偏振参量取值范围合理;对2016年9月14日一次处于不同发展阶段的多单体对流云进行水凝物粒子分类识别,结果显示处于发展阶段对流云中存在过冷水柱,其形成的微物理过程是对流云中强烈的上升气流将暖层的水滴抬升到0°C层之上形成过冷云雨水,进而冻结形成雹胚并发展成为冰雹。

关键词： X波段双偏振雷达数据质量控制衰减订正粒子识别

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A COUPLED MODEL OF HYDRODYNAMICS AND WATER QUALITY FOR YUQIAO RESERVOIR IN HAIHE RIVER BASIN

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Journal of Hydrodynamics 2008年第5期20卷 574-582页

作者： LIU Xiao-bo PENG Wen-qi HE Guo-jian LIU Jing-ling WANG Yu-chun School of Environment Beijing Normal University Beijing 100875 China Department of Water Environment China Institute of Water Resources and Hydropower Research Beijing100038 China Department of Hydraulic Engineering State Key Laboratory of Hydroscience and Engineering TsinghuaUniversity Beijing 100084 China

In order to simulate the characteristics of hydrodynamic field and mass transport processes in the Yuqiao Reservoir （YQR）, a 2-D coupled model of hydrodynamics and water quality was developed, and the water-quality related state variables in this model included CODMn, TN and TP. The hydrodynamic model was driven by employing observed winds and daily measured flow data to simulate the seasonal water cycle of the reservoir. The simulation of the mass transport and transformation processes of CODMn, TN and TP was based on the unsteady diffusion equations, driven by observed meteorological forcing and external loadings, with the fluxes form the bottom of reservoir and the plant photosynthesis and respiration as internal sources and sinks. A finite volume method and Alternating Direction Implicit （ADI） scheme were used to solve these equations. The model was calibrated and verified by using the data observed from YQR in two different years. The results showed that in YQR, the wind-driven current was an important style of lake current, while the concentration of water quality item was decreasing from east to west because of the external pollutant loadings. There was a good agreement between the simulated and measured values, with the minimal calculation error percent of 0.1% and 2.6% and the mean error percent of 44.0% and 51.2% for TN and TP separately. The simulation also showed that, in YQR, the convection was the main process in estuaries of inflow river, and diffusion and biochemical processes dominate in center of reservoir. So it was necessary to build a pre-pond to reduce the external loadings into the reservoir.

关键词： model simulation Yuqiao Reservoir (YQR) wind driven current water quality

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High time resolution observation and statistical analysis of atmospheric light extinction properties and the chemical speciation of fine particulates

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Science china Chemistry 2010年第8期53卷 1801-1808页

作者： YAO TingTing1,HUANG XiaoFeng1,HE LingYan1,HU Min2,SUN TianLe1,XUE Lian1,LIN Yun1,ZENG LiWu1 & ZHANG YuanHang2 1key laboratory for Urban Habitat Environmental Science and Technology,School of Environment and Energy,Peking University Shenzhen Graduate School,Shenzhen 518055,china 2state key Joint laboratory of Environmental Simulation and Pollution Control College of Environmental sciences and Engineering,Peking University,beijing 100871,china key laboratory for Urban Habitat Environmental Science and Technology School of Environment and Energy Peking University Shenzhen Graduate School Shenzhen China state key Joint laboratory of Environmental Simulation and Pollution Control College of Environmental sciences and Engineering Peking University Beijing China

In recent years,the visibility deterioration caused by regional fine particulate pollution becomes one of the crucial air pollution problems in the urban areas of our *** rapid variation of visibility and fine particulates make it difficult to estimate the relationship between them precisely and accurately unless high time resolution observation data can be *** study aims to fill this gap in the field of atmospheric science by establishing a formula using multiple linear *** fitting goodness (R2=0.913,n=3167) was obtained using 10 min average of high-resolution real-time light scattering coefficients,light absorption coefficients,main chemical speciation concentration in PM1 and some meteorological parameters from 17 Jan to 16 Feb,*** shows that the average light extinction coefficient during the observation in the winter of Shenzhen was measured to be 290 ± 183 Mm?1,consisting of 72% of light scattering and 21% of *** terms of the percentage contribution of PM1 chemical species to the total light extinction,the organic matter was estimated to be most with an average of 45%,followed by ammonium sulfate with an average of 24%.The contributions of black carbon and ammonium nitrate were 17% and 12%,***,the diurnal variation of light extinction was investigated as well in this study.

关键词： light extinction PM1 chemical speciation high time resolution multiple linear regressions

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