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L-Cysteine inhibits root elongation through auxin/PLETHORA and SCR/SHR pathway in Arabidopsis thaliana

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Journal of Integrative Plant Biology 2015年第2期57卷 186-197页

作者： Zhen Wang Jie-li Mao Ying-Jun Zhao chuan-you li Cheng-Bin Xiang School of life Sciences University of Science and Technology of China Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Institute of Genetics and Developmental Biology The Chinese Academy of Sciences

L-Cysteine plays a prominent role in sulfur metabo- lism of plants. However, its role in root development is largely unknown. Here, we report that L-cysteine reduces primary root growth in a dosage-dependent manner. Elevating cellular L-cysteine level by exposing Arabidopsis thaliana seedlings to high L-cysteine, buthionine sulphoximine, or O-acetylserine leads to altered auxin maximum in root tips, the expression of quiescent center cell marker as well as the decrease of the auxin carriers PIN1, PIN2, PIN3, and PIN7 of primary roots. We also show that high L-cysteine significantly reduces the protein level of two sets of stem cell specific transcription factors PLETHORA1/2 and SCR/SHR. However, L-cysteine does not downregulate the transcript level of PiNs, PLTs, or SCR/SHR, suggesting that an uncharacterized post-transcriptional mechanism may regulate the accumulation of PIN, PLT, and SCR/SHR proteins and auxin transport in the root tips. These results suggest that endogenous L-cysteine level acts to maintain root stem cell niche by regulating basal- and auxin-induced expression of PLT1/2 and 5CR/SHR. L-Cysteine may serve as a link between sulfate assimilation and auxin in regulating root growth.

关键词： Auxini L-cysteine PIN PLETHORA root stem cell root system architecture

Sulfur nutrient availability regulates root elongation by affecting root indole-3-acetic acid levels and the stem cell niche

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Journal of Integrative Plant Biology 2014年第12期56卷 1151-1163页

作者： Qing Zhao Yu Wu Lei Gao Jun Ma chuan-you li Cheng-Bin Xiang School of life Sciences University of Science and Technology of China Institute of Genetics and Developmental Biology The Chinese Academy of Sciences

Sulfur is an essential macronutrient for plants with numerous biological functions. However, the influence of sulfur nutrient availability on the regulation of root development remains largely unknown. Here, we report the response of Arabidopsis thaliana L. root development and growth to different levels of sulfate, demonstrating that low sulfate levels promote the primary root elongation. By using various reporter lines, we examined in vivo IAA level and distribution, cell division,and root meristem in response to different sulfate *** the dynamic changes of in vivo cysteine, glutathione,and IAA levels were measured. Root cysteine, glutathione, and IAA levels are positively correlated with external sulfate levels in the physiological range, which eventually affect root system architecture. Low sulfate levels also downregulate the genes involved in auxin biosynthesis and transport, and elevate the accumulation of PLT1 and PLT2. This study suggests that sulfate level affects the primary root elongation by regulating the endogenous auxin level and root stem cell niche maintenance.

关键词： Cysteine indole-3-acetic acid root system architecture stem cell niche sulfate

LSCHL4 from Japonica Cultivar, Which Is Allelic to NAL 1, Increases Yield of Indica Super Rice 93-11

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Molecular Plant 2014年第8期7卷 1350-1364页

作者： Guang-Heng Zhang Shu-Yu li li Wang Wei-Jun Ye Da-li Zeng Yu-Chun Rao you-lin Peng Jiang Hu Yao-Long Yang Jie Xu De-Yong Ren Zhen-Yu Gao li Zhu Guo-Jun Dong Xing-Ming Hu Mei-Xian Yan Long-Biao Guo chuan-you li Qian Qian State Key Laboratory of Rice Biology China National Rice Research Institute 359 Tiyuchang Road Hangzhou 310006 Zhejiang China State Key Laboratory of Plant Genomics National Center for Plant Gene Research Institute of Genetics and Developmental BiologyChinese Academy of Sciences Beijing 100101 China

The basic premise of high yield in rice is to improve leaf photosynthetic efficiency and coordinate the sourcesink relationship in rice plants. Quantitative trait loci （QTLs） related to morphological traits and chlorophyll content of rice leaves were detected at the stages of heading to maturity, and a major QTL （qLSCHL4） related to flag leaf shape and chlorophyll content was detected at both stages in recombinant inbred lines constructed using the indica rice cultivar 93-11 and the japonica rice cultivar Nipponbare. Map-based cloning and expression analysis showed that LSCHL4 is allelic to NAL1, a gene previously reported in narrow leaf mutant of rice. Overexpression lines transformed with vector carrying LSCHL4 from Nipponbare and a near-isogenic line of 93-11 （NIL-9311） had significantly increased leaf chlorophyll content, enlarged flag leaf size, and improved panicle type. The average yield of NIL-9311 was 18.70% higher than that of 93-11. These results indicate that LSCHL4 had a pleiotropic function. Exploring and pyramiding more high-yield alleles resem- bling LSCHL4 for super rice breeding provides an effective way to achieve new breakthroughs in raising rice yield and generate new ideas for solving the problem of global food safety.

关键词： rice breeding QTL qLSCHL4 panicle type pleiotropism yield potential.

Quantitative study of tectonic geomorphology along Haiyuan fault based on airborne liDAR

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Chinese Science Bulletin 2014年第20期59卷 2396-2409页

作者： Tao Chen Pei Zhen Zhang Jing liu chuan you li Zhi Kun Ren Kenneth W. Hudnut State Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration National Earthquake Infrastructure Service United States Geological Survey

High-precision and high-resolution topography are the fundamental data for active fault *** detection and ranging(liDAR)presents a new approach to build detailed digital elevation models *** take the Haiyuan fault in Gansu Province as an example of how liDAR data may be used to improve the study of active faults and the risk assessment of related *** the eastern segment of the Haiyuan fault,the Shaomayin site has been comprehensively investigated in previous research because of its exemplary tectonic topographic *** on unprecedented liDAR data,the horizontal and vertical coseismic offsets at the Shaomayin site are *** measured horizontal value is about 8.6 m,and the vertical value is about 0.8 *** prior dating ages sampled from the same location,we estimate the horizontal slip rate as4.0±1.0 mm/a with high confidence and define that the lower bound of the vertical slip rate is 0.4±0.1 mm/a since the *** data can repeat the measurements of field work on quantifying offsets of tectonic landform features quite *** offset landforms are visualized on an office computer workstation easily,and specialized software may be used to obtain displacement *** combining precious chronological results,the fundamentallink between fault activity and large earthquakes is better recognized,as well as the potential risk for future earthquake hazards.

关键词：构造地貌海原断裂机载激光雷达 liDAR 数字高程模型计算机工作站活动断层地貌特征

龙门山后山断裂中段汶川-茂县断裂的晚第四纪活动性分析

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地震地质 2017年第3期39卷 572-586页

作者：王旭光李传友吕丽星董金元中国地震局地质研究所活动构造与火山重点实验室100029

龙门山断裂带位于青藏高原东缘与四川盆地交界处,构造位置非常重要,对中国西南地区地形地貌、地质构造以及地震的发生等影响深远。通过卫星影像解译以及野外调查,初步分析认为岷江在汶川-茂县断裂区段主要发育5级阶地。结合前人研究获... 详细信息

龙门山断裂带位于青藏高原东缘与四川盆地交界处,构造位置非常重要,对中国西南地区地形地貌、地质构造以及地震的发生等影响深远。通过卫星影像解译以及野外调查,初步分析认为岷江在汶川-茂县断裂区段主要发育5级阶地。结合前人研究获得的阶地年龄,文中将T_1—T_5阶地年龄分别限定在3~10ka、约20ka、40~50ka、60ka和80ka。另外,通过对区域内断裂沿线的阶地、冲沟等地质地貌的野外调查,结合卫星影像解译和差分GPS测量等工作,认为汶川-茂县断裂在T_3阶地(40~50kaBP)形成后、T_2阶地(约20ka BP)形成前有过活动,而在T_2阶地形成以来不再活动。结合中央断裂、前山断裂均为全新世活动断裂的认识,推测龙门山断裂带的活动已转移到更靠近盆地的中央断裂和前山断裂上。

关键词：河流阶地断裂活动性汶川-茂县断裂龙门山断裂带

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卫生计生服务机构十年整合的实践与思考

现代医院管理 2014年第4期12卷 41-43页

作者：尤传利扬州市妇幼保健院江苏省扬州市225002

目的分析总结扬州市妇幼保健院十余年来卫生计生资源整合、合作开展工作情况,评价卫计合作的好处。方法整合扬州市计划生育指导所和市妇幼保健院,将计划生育、妇幼保健、生殖健康等服务在同一平台展开,统一人事、财务、工作、考核奖惩... 详细信息

目的分析总结扬州市妇幼保健院十余年来卫生计生资源整合、合作开展工作情况,评价卫计合作的好处。方法整合扬州市计划生育指导所和市妇幼保健院,将计划生育、妇幼保健、生殖健康等服务在同一平台展开,统一人事、财务、工作、考核奖惩管理。结果 2013年全市孕产妇保健管理率为99.9%;婚检率90.26%;妇女病普查率为98.03%;出生缺陷率为4.47%;婴儿死亡率为2.4%。合作后院所业务收入上升420%,职工平均收入上升212%,固定资产上升639%。结论卫生计生资源整合共享,有力推进了卫生计生工作同步发展,呈现出"1+1>2"的效应。

关键词：卫生计划生育资源整合评价

Effects of Ti-and Nb-based transition element from single to multiple compound oxides and carbon-based composite additives on Mg-MgH2 hydrogen storage material

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Tungsten 2025年第1期7卷 32-49页

作者： li-Rong Xiao Chen Chen Shuo Wang Zi-Yin Dai Hideo Kimura Cui Ni chuan-Xin Hou Xue-Qin Sun Si-Jie Guo Wei Du Xiu-Bo Xie School of Environmental and Material Engineering Yantai University Bosch HUAYU Steering Systems (Yantai) Co. Ltd.Ytp/MFE University of Tennessee Knoxville Shandong Key Laboratory of Eco-Environmental Science for the Yellow River Delta Shandong University of Aeronautics

MgH2is considered as a promising hydrogen storage material for its high hydrogen storage capacity,low cost and abundant resource ***,the low kinetics and high enthalpy formation of MgH2limit its wide *** the perspective of adding catalysts to enhance the hydrogen storage properties of Mg-MgH2,this article elaborated the main catalysts based on Ti and Nb transition elements,including single oxide catalysts,binary oxides catalysts（combined with Ni,Na,Sr,V,etc.）,multiple catalysts bound to carbon,and composite catalysts with Ti and Nb elements combined with MXene ***,the main pathways of various catalysts to reduce the reaction activity and broaden the hydrogen desorption channel were also *** Ti-based catalysts can enhance the reactive sites of the matrix by forming multivalent states,while Nb-based catalysts broaden the hydrogen reaction channels by forming tiny *** improving the size structure and enhancing the grain size stability,combined with carbon materials should be the future considerations.

关键词： Catalysts Mg-based hydrogen storage alloys Solid hydrogen storage Transition metal elements

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分布式光伏电源管理现状解析和思考

安徽电气工程职业技术学院学报 2016年第4期21卷 26-28页

作者：赵明周猷传李磊国网滁州供电公司安徽滁州239000

2013年1月,国家《能源发展"十二五"规划》提出"构建现代能源体系,加快太阳能等新能源开发"[1]。次月,国家电网公司立足能源可持续发展,提出"为分布式电源项目接入电网提供便利条件,为接入系统工程建设开辟绿色通道"[1],同期发布《关于... 详细信息

2013年1月,国家《能源发展"十二五"规划》提出"构建现代能源体系,加快太阳能等新能源开发"[1]。次月,国家电网公司立足能源可持续发展,提出"为分布式电源项目接入电网提供便利条件,为接入系统工程建设开辟绿色通道"[1],同期发布《关于做好分布式电源并网服务工作的意见》。围绕"支持、欢迎、服务"分布式光伏发电发展工作方针,国网滁州供电公司积极践行,主动作为,在推进分布式光伏电源接入方面做了一些探索。

关键词：分布式光伏光伏电源管理

Steady-State Reversed Shear Mode Sustained by Lower Hybrid Current Drive

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Chinese Physics Letters 1998年第8期15卷 582-584页

作者： li Duo-chuan li you-yi Institute of Plasma Physics Chinese Academy of SciencesHefei 230031

A simple model is presented for analysis of radial diffusion of current during lower hybrid current drive(LHCD).Considering the effect of radial diffusion of LH driven current and the bootstrap current,a steady-state reversed shear magnetic configuration can be sustained simply by LHCD and a such case on HT-7U tokamak was calculated as an example.

关键词： reversed diffusion sustained