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double-cone ignition;streaked optical pyrometer;velocity interferometer system for any reflector

High Power Laser Science and Engineering 2024年第1期12卷 52-59页

作者： Dawei Yuan shaojun Wang Huigang Wei Haochen Gu Yu dai Jiayong Zhong Yutong Li Gang Zhao Jie Zhang Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijingChina Institute of Frontiers in Astronomy and Astrophysics of Beijing Normal University BeijingChina Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijingChina Key Laboratory for Laser Plasmas(MOE)and School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Department of Astronomy Beijing Normal UniversityBeijingChina Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghaiChina School of Physical Sciences University of Chinese Academy of SciencesBeijingChina Songshan Lake Materials Laboratory DongguanChina

The velocity interferometer system for any reflector(VISAR) coupled with a streaked optical pyrometer(SOP) system is used as a diagnostic tool in inertial confinement fusion(ICF) experiments involving equations of state and shock timing.To validate the process of adiabatically compressing the fuel shell through precise tuning of shocks in experimental campaigns for the double-cone ignition(DCI) scheme of ICF, a compact line-imaging VISAR with an SOP system is designed and implemented at the Shenguang-II upgrade laser facility. The temporal and spatial resolutions of the system are better than 30 ps and 7 μm, respectively. An illumination lens is used to adjust the lighting spot size matching with the target size. A polarization beam splitter and λ/4 waveplate are used to increase the transmission efficiency of our system. The VISAR and SOP work at 660 and 450 nm, respectively, to differentiate the signals from the scattered lights of the drive lasers. The VISAR can measure the shock velocity. At the same time, the SOP system can give the shock timing and relative strength. This system has been used in different DCI campaigns, where the generation and propagation processes of multi-shock are carefully diagnosed.

关键词： double-cone ignition streaked optical pyrometer velocity interferometer system for any reflector

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Genome-wide identification and characterization of ACBP gene family in Populus reveal salinity alkali-responsive profiles

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Journal of Forestry Research 2023年第2期34卷 481-496页

作者： Yu Chang Xinru Xu Hongxia Zheng Hao Xie Bo Li Sixue Chen Ying Li shaojun dai Key Laboratory of Saline-Alkali Vegetation Ecology Restoration(Northeast Forestry University) Ministry of EducationCollege of Life SciencesNortheast Forestry UniversityHarbin 150040People’s Republic of China Development Center of Plant Germplasm Resources College of Life SciencesShanghai Normal UniversityShanghai 200234People’s Republic of China Department of Biology Genetics InstitutePlant Molecular and Cellular Biology ProgramInterdisciplinary Center for Biotechnology ResearchUniversity of FloridaGainesvilleFloridaUSA

Acyl-CoA-binding proteins(ACBPs)are important for the transport of acyl groups for macro molecular biosynthesis involved in plant growth,development,and diverse stress(e.g.,cold,drought,salinity,and heavy metals)responses.Here,we report the phylogeny and characteristics of the ACBP family in the woody plant Populus trichocarpa.Eight genes encoding ACBP proteins were identified,and they are distributed on eight chromosomes in P.trichocarpa.These PtACBP genes were divided into four subgroups according to gene structure,conserved motifs and phylogenetic relationship.Promoter analysis revealed that cis-elements were related to stress response,phytohormone response,and physical and reproductive growth regulation.Expression levels of PtACBP genes varied among different organs,with the highest expression in leaves and the lowest in stems.Quantitative real-time PCR(qRT-PCR)analysis showed that under salinity-alkali stresses(i.e.,200 mM NaCl,75 mM Na2CO3,and 100 mM NaHCO3),four(PtACBP1,PtACBP3,PtACBP4 and PtACBP8)of eight PtACBP genes were significantly induced in roots and leaves.These data provide a comprehensive analysis of the ACBPs family in P.trichocarpa,which could be useful for gene function analyses.

关键词： Acyl-CoA-binding proteins(ACBPs) Gene structure Expression pattern Stress response Populus trichocarpa

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Flag-Transitive 3-(v,k,3)Designs and PSL(2,q)Groups

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Algebra Colloquium 2021年第1期28卷 33-38页

作者： shaojun dai Shangzhao Li School of Mathematical Sciences Tiangong UniversityTianjin 300387China School of Mathematics and Statistics Changshu Institute of Technology ChangshuJiangsu 215500China

This article is a contribution to the study of the automorphism groups of 3-(v,k,3)designs.Let S=(P,B)be a non-trivial 3-(q+1,k,3)design.If a two-dimensional projective linear group PSL(2,q)acts flag-transitively on S... 详细信息

关键词： flag-transitive 3-designs PSL(2,q)groups

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Exploring the diversity of plant proteome

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Journal of Integrative Plant Biology 2021年第7期63卷 1197-1210页

作者： Yanmei Chen Yi Wang Jun Yang Wenbin Zhou shaojun dai State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural UniversityBeijing 100193China State Key Laboratory of Wheat and Maize Crop Science College of Resources and EnvironmentHenan Agricultural UniversityZhengzhou 450002China Shanghai Key Laboratory of Plant Functional Genomics and Resources Shanghai Chenshan Plant Science Research CenterChinese Academy of SciencesShanghai Chenshan Botanical GardenShanghai 201602China Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China Development Center of Plant Germplasm Resources College of Life SciencesShanghai Normal UniversityShanghai 200234China

The tremendous functional,spatial,and temporal diversity of the plant proteome is regulated by multiple factors that continuously modify protein abundance,modifications,interactions,localization,and activity to meet the dynamic needs of plants.Dissecting the proteome complexity and its underlying genetic variation is attracting increasing research attention.Mass spectrometry(MS)‐based proteomics has become a powerful approach in the global study of protein functions and their relation-ships on a systems level.Here,we review recent breakthroughs and strategies adopted to unravel the diversity of the proteome,with a specific focus on the methods used to analyze posttranslational modifications(PTMs),protein localization,and the organization of proteins into functional modules.We also consider PTM crosstalk and multiple PTMs temporally regulating the life cycle of proteins.Fi-nally,we discuss recent quantitative studies using MS to measure protein turnover rates and examine future directions in the study of the plant proteome.

关键词： glycosylation mass spectrometry organellar proteo-mics phosphorylation SnRK kinase ubiquitination

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Cell type-specific proteomics uncovers a RAF15-SnRK2.6/OST1 kinase cascade in guard cells

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植物学报:英文版 2023年第9期65卷 2122-2137页

作者： Hongliang Wang Yubei Wang Tian Sang Zhen Lin Rongxia Li Weiwei Ren Xin Shen Bing Zhao Xiao Wang Xuebin Zhang Shaoqun Zhou shaojun dai Honghong Hu Chun-Peng Song Pengcheng Wang Shanghai Center for Plant Stress Biology CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 200032China University of Chinese Academy of Sciences Beijing 100049China Institute of Advanced Biotechnology and School of Life Sciences Southern University of Science and TechnologyShenzhen 518055China Shanghai Bioprofile Technology Company Ltd Shanghai 200241China Center of Plant Germplasm Resources College of Life SciencesShanghai Normal UniversityShanghai 200234China National Key Laboratory of Crop Genetic Improvement College of Life Science and TechnologyHuazhong Agricultural UniversityWuhan 430070China State Key Laboratory of Crop Stress Adaptation and Improvement College of Life SciencesCollege of AgricultureAcademy for Advanced Interdisciplinary StudiesHenan UniversityKaifeng 475004China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureKey Laboratory of Synthetic BiologyMinistry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China

Multicellular organisms such as plants contain various cell types with specialized functions.Analyzing the characteristics of each cell type reveals specific cell functions and enhances our understanding of organization and function at the organismal level.Guard cells(GCs)are specialized epidermal cells that regulate the movement of the stomata and gaseous exchange,and provide a model genetic system for analyzing cell fate,signaling,and function.Several proteomics analyses of GC are available,but these are limited in depth.Here we used enzymatic isolation and flow cytometry to enrich GC and mesophyll cell protoplasts and perform in-depth proteomics in these two major cell types in Arabidopsis leaves.We identified approximately 3,000 proteins not previously found in the GC proteome and more than600 proteins that may be specific to GC.The depth of our proteomics enabled us to uncover a guard cell-specific kinase cascade whereby Raf15and Snf1-related kinase2.6(SnRK2.6)/OST1(open stomata 1)mediate abscisic acid(ABA)-induced stomatal closure.RAF15 directly phosphorylated SnRK2.6/OST1 at the conserved Ser175 residue in its activation loop and was sufficient to reactivate the inactive form of SnRK2.6/OST1.ABAtriggered SnRK2.6/OST1 activation and stomatal closure was impaired in raf15 mutants.We also showed enrichment of enzymes and flavone metabolism in GC,and consistent,dramatic accumulation of flavone metabolites.Our study answers the long-standing question of how ABA activates SnRK2.6/OST1 in GCs and represents a resource potentially providing further insights into the molecular basis of GC and mesophyll cell development,metabolism,structure,and function.

关键词： abscisic acid guard cell metabolomics phosphorylation proteomics signaling

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Isobaric Tags for Relative and Absolute Quantificationbased Comparative Proteomics Reveals the Features of Plasma Membrane-Associated Proteomes of Pollen Grains and Pollen Tubes from Lilium davidii

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Journal of Integrative Plant Biology 2010年第12期52卷 1043-1058页

作者： Bing Han Sixue Chen shaojun dai Ning Yang Tai Wang Research Center for Molecular & Developmental Biology Key Laboratory of Photosynthesis & Environmental Molecular Physiology Institute of Botany Chinese Academy of Sciences and National Center for Plant Gene Research Beijing 100093 China Department of Biology Genetics Institute and Interdisciplinary Center for Biotechnology Research University of Florida GaJnesville Florida 32610 USA Key Laboratory of Saline-alkali Vegetation Ecology Restoration in Oil Field Ministry of Education Northeast Forestry University Harbin 150040 China Graduate University of the Chinese Academy of Sciences Beijing 10049 China

Mature pollen grains （PGs） from most plant species are metabolically quiescent. However, once pollinated onto stigma, they quickly hydrate and germinate. A PG can give rise to a vegetative cell-derived polarized pollen tube （PT）, which represents a specialized polar cell. The polarized PT grows by the tip and requires interaction of different signaling molecules localized in the apical plasma membrane and active membrane trafficking. The mechanisms underlying the interaction and membrane trafficking are not well understood. In this work, we purified PG and PT plasma-membrane vesicles from Lilium davidii Duch. using the aqueous two-phase partition technique, then enriched plasma membrane proteins by using Brij58 and KCl to remove loosely bound contaminants. We identified 223 integral and membrane-associated proteins in the plasma membrane of PGs and PTs by using isobaric tags for relative and absolute quantification （iTRAQ） and 2-D high-performance liquid chromatography-tandem mass spectrometry. More than 68% of the proteins have putative transmembrane domains and/or lipid-modified motifs. Proteins involved in signal transduction, membrane trafficking and transport are predominant in the plasma-membrane proteome. We revealed most components of the clathrin-dependent endocytosis pathway. Statistical analysis revealed 14 proteins differentially expressed in the two development stages： in PTs, six upregulated and eight downregulated are mainly involved in signaling, transport and membrane trafficking. These results provide novel insights into polarized PT growth.

关键词： Polarity Optical properties Pollen Platinum Cells Lymphocytes Cell membranes Andean region Uses Transport

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Arabidopsis CAP1 mediates ammonium-regulated root hair growth by influencing vesicle trafficking and the cytoskeletal arrangement in root hair cells

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Journal of Genetics and Genomics 2022年第10期49卷 986-989页

作者： Juanjuan Yu Xiaonan Ma Lianlian Wang Nannan Dong Kai Wang Qingye You Yifei Xu Chong Wang Zhiping Dong Zhaobin Shi shaojun dai Ling Bai Chun-Peng Song State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifengHenan 475001China Henan International Joint Laboratory of Agricultural Microbial Ecology and Technology College of Life SciencesHenan Normal UniversityXinxiangHenan 453007China Development Center of Plant Germplasm Resources College of Life SciencesShanghai Normal UniversityShanghai 200234China

Plant root hairs are essential for mineral and water absorption,which possess sophisticated sensory mechanisms to allow them to respond to different environmental signals.Ammonium(NH^(+))is a major form of nitrogen in... 详细信息

关键词： arrangement hair Arabidopsis

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Proteomics characteristics of rice leaves in response to environmental factors

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Frontiers in Biology 2010年第3期5卷 246-254页

作者： Sining KANG Sixue CHEN shaojun dai College of Life Sciences Key Laboratory of Forestry Tree Genetics Improvement and BiotechnologyMinistry of EducationNortheast Forestry UniversityHarbin 150040China Department of Biology Genetics InstitutePlant Molecular and Cellular Biology ProgramInterdisciplinary Center for Biotechnology ResearchUniversity of FloridaGainesvilleFL 32610USA

Rice is an important food crop worldwide.Its productivity has been influenced by various abiotic and biotic factors including temperature,drought,salt,microbe,ozone,hormone and glyphosate.The responses of plants to stress are regulated by multiple signaling pathways,and the mechanisms of leaf growth and development in response to stress remain unclear to date.Recently,proteomics studies have provided new evidence for better understanding the mechanisms.The proteins in response to different stress conditions are mainly involved in photosynthesis,signal transduction,transcription,protein synthesis and destination,defense response,cytoskeleton,energy,cell wall and other metabolism.In addition,some stress type-specific proteins have been identified,such as small heat shock proteins under temperature stress,S-like RNase homolog and actin depolymerizing factor under drought stress,ascorbate peroxidase and lipid peroxidation under salt stress,probenazole-inducible protein and rice pathogenesis-related proteins under blast fungus.Many of the proteins including ribulose-1,5-bisphosphate carboxylase/oxygenase(RuBisCO),molecular chaperones,antioxidases and S-adenosylmethionine synthetase play very important roles in leaves.This paper reviews the proteomic characterization of rice leaves in response to various environmental factors.

关键词： rice leaf proteomics environmental factor

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The stomata frontline of plant interaction with the environment-perspectives from hormone regulation

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Frontiers in Biology 2012年第2期7卷 96-112页

作者： Mengmeng ZHU shaojun dai Sixue CHEN Department of Biology Genetics Institute Interdisciplinary Center for Biotechnology Research （ICBR） University of Florida Gainesville FL 32610 USA Alkali Soil Natural Environmental Science Center Northeast Forestry University Key Laboratory of Saline-alkali Vegetation Ecology Restoration in Oil Field Ministry of Education Harbin 150040 China

Plants have evolved elaborate mechanisms to perceive and integrate signals from various environmental conditions. On leaf surface, stomata formed by pairs of guard cells mediate gas exchange, water transpiration as well as function in response to abiotic and biotic stresses. Stomatal closure could be induced by drought, salt, pathogen and other adverse conditions. This constitutes an instant defense response to prevent further damage to plants. Abscisic acid （ABA） is a major plant hormone involved in stress responses. Stress-activated ABA synthesis causes stomatal closure and prevents opening to reduce water loss and cell dehydration. Key regulatory receptor complex and other important components in the ABA signaling pathway have been identified. However, our knowledge of ABA signal transduction in guard cells is far from complete. Jasmonates are a group of phytohormones generally known to be important for plant defense against insects and necrotrophic pathogens. The increased levels of methyl jasmonate （MeJA） induced by herbivory and pathogen invasion show a similar effect on stomatal movement associated with ROS production as ABA. Investigation of guard cell signaling networks involving the two important phytohormones is significant and exciting. Information about protein and metabolite components and how they interact in guard cells is lacking. Here we review recent advances on hormone signaling networks in guard cells and how the networks integrate environmental signals to plant physiological output.

关键词： stomata guard cells hormone signaling molecular networks

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A high-quality genome sequence of alkaligrass provides insights into halophyte stress tolerance

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Science China(Life Sciences) 2020年第9期63卷 1269-1282页

作者： Wenting Zhang Jie Liu Yongxue Zhang Jie Qiu Ying Li Baojiang Zheng Fenhong Hu shaojun dai Xuehui Huang Shanghai Key Laboratory of Plant Molecular Sciences College of Life SciencesShanghai Normal UniversityShanghai 200234China Key Laboratory of Saline-alkali Vegetation Ecology Restoration(Northeast Forestry University) Ministry of EducationCollege of Life SciencesNortheast Forestry UniversityHarbin 150040China

Alkaligrass(Puccinellia tenuiflora) is a monocotyledonous halophytic forage grass widely distributed in Northern China. It belongs to the Gramineae family and shares a close phylogenetic relationship with the cereal crops, wheat and barley. Here, we present a high-quality chromosome-level genome sequence of alkaligrass assembled from Illumina, Pac Bio and 10× Genomics reads combined with genome-wide chromosome conformation capture(Hi-C) data. The ~1.50 Gb assembled alkaligrass genome encodes 38,387 protein-coding genes, and 54.9% of the assembly are transposable elements, with long terminal repeats being the most abundant. Comparative genomic analysis coupled with stress-treated transcriptome profiling uncovers a set of unique saline-and alkaline-responsive genes in alkaligrass. The high-quality genome assembly and the identified stress related genes in alkaligrass provide an important resource for evolutionary genomic studies in Gramineae and facilitate further understanding of molecular mechanisms underlying stress tolerance in monocotyledonous halophytes. The alkaligrass genome data is freely available at http://***/data/alkaligrass.html.

关键词： alkaligrass Puccinellia tenuiflora genome assembly saline-alkaline tolerance

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