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OsMAPK6 phosphorylates a zinc finger protein OsLIC to promote downstream OsWRKY30 for rice resistance to bacterial blight and leaf streak

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Journal of Integrative Plant Biology 2022年第5期64卷 1116-1130页

作者： Lihan Wang Jie Chen Yuqin Zhao Shiping Wang Meng Yuan National Key Laboratory of Crop Genetic Improvement National Center of Plant Gene Research(Wuhan)Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070China

Rice OsLIC encoding a CCCH zinc finger transcription factor plays an important role in immunity.However,the immune signaling pathways that OsLIC-involved and the underlying mechanisms that OsLIC-conferred resistance against pathogens are largely unclear.Here,we show that OsLIC,as a substrate for Os MAPK6,negatively regulates resistance to Xanthomonas oryzae pv.oryzae(Xoo)and X.oryzae pv.oryzicola(Xoc)by directly suppressing OsWRKY30 transcription.Biochemical assays showed that OsLIC bound to OsWRKY30 promoter and suppressed its transcription.Genetic assays confirmed that the osilc knockout mutants and OsWRKY30-overexpressing plants exhibited enhanced resistance to Xoo and Xoc,knocking out OsWRKY30 in the oslic mutants attenuated the resistance against bacterial pathogens.Os MAPK6 physically interacted with and phosphorylated OsLIC leading to decreased OsLIC DNA-binding activity,therefore,overexpression of OsLIC partially suppressed Os MAPK6-mediated rice resistance.In addition,both Os MAPK6-phosphorylated activation of OsLIC and phosphorylation-mimic OsLIC_(5D) had reduced DNA-binding activity towards OsWRKY30 promoter,thereby promoting OsWRKY30 transcription.Collectively,these results reveal that Os MAPK6-mediated phosphorylation of OsLIC positively regulates rice resistance to Xoo and Xoc by modulating OsWRKY30 transcription,suggesting that Os MAPK6-OsLIC-OsWRKY30 module is an immune signaling pathway in response to the bacterial pathogens.

关键词： OsLIC OsMAPK6 OsWRKY30 rice Xanthomonas oryzae

On the Sixth Power Mean of the Two-term Exponential Sums

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Acta Mathematica Sinica,English Series 2022年第3期38卷 510-518页

作者： Wen Peng ZHANG yuan yuan meng School of Mathematics Northwest UniversityXi’an710127P.R.China

The main purpose of this article is to study the calculating problem of the sixth power mean of the two-term exponential sums,and give an interesting calculating formula for it.At the same time,the paper also provides... 详细信息

关键词： The two-term exponential sums the sixth power mean

In Loving Memory of Professor Shiping Wang

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Molecular Plant 2019年第9期12卷 1171-1172页

作者： Meng Yuan National Key Laboratory of Crop Genetic Improvement National Center of Plant Gene Research(Wuhan)Huazhong Agricultural UniversityWuhan 430070China

We are deeply saddened that our respected colleague Dr.Shiping Wang passed away on May 14,2019,at the age of 64 after a hard-fought battle with cancer for four years and seven months.Dr.Wang was a professor of plant pathology at Huazhong Agricultural University(HZAU),China.She was also a beloved wife,mother,mentor,and friend.We shall miss her dearly.

关键词： Loving mother passed

Regulation of Rice Tillering by RNA-Directed DNA Methylation at Miniature Inverted-Repeat Transposable Elements

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Molecular Plant 2020年第6期13卷 851-863页

作者： Le Xu Kun yuan Meng Yuan Xiangbing meng Min Chen Jianguo Wu Jiayang Li Yijun Qi Center for Plant Biology School of Life SciencesTsinghua UniversityBeijing 100084China Tsinghua-Peking Center for Life Sciences Beijing 100084China Key Laboratory of Plant Genomics and National Center for Plant Gene Research Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China Vector-borne Virus Research Center State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Province Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhou 350002China

Tillering is a major determinant of rice plant architecture and grain yield.Here,we report that depletion of rice OsNRPD1a and OsNRPD1b,two orthologs of the largest subunit of RNA polymerase IV,leads to a high-tillering phenotype,in addition to dwarfism and smaller panicles.OsNRPD1a and OsNRPD1b are required for the production of 24-nt small interfering RNAs that direct DNA methylation at transposable elements(TEs)including miniature inverted-repeat TEs(MITEs).Interestingly,many genes are regulated either positively or negatively by TE methylation.Among them,OsMIR156d and OsMIR156j,which promote rice tillering,are repressed by CHH methylation at two MITEs in the promoters.By contrast,D14,which suppresses rice tillering,is activated by CHH methylation at an MITE in its downstream.Our findings reveal regulation of rice tillering by RNA-directed DNA methylation at MITEs and provide potential targets for agronomic trait enhancement through epigenome editing.

关键词： RdDM siRNA MITEs OsMIR156 D14 tiller

Precise Editing Enables Crop Broad-Spectrum Resistance

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Molecular Plant 2019年第12期12卷 1542-1544页

作者： Jingjing Tian Guoyong Xu Meng Yuan National Key Laboratory of Crop Genetic Improvement National Center of Plant Gene Research(Wuhan)Huazhong Agricultural UniversityWuhan 430070China State Key Laboratory of Hybrid Rice Institute for Advanced Studies(IAS)Wuhan UniversityWuhan 430072China

Loss of resistance to fast-adapted pathogens urgently calls for a sustainable and broad-spectrum strategy to meet the requirement of crop yield and safety for the increasing world population.Pyramidization of resistance genes,such as nucleotide-binding leucine-rich repeat proteins,from diverse cultivars,landraces,and domesticated or wild germplasm accessions offers the most direct practice for this purpose.Nevertheless,the facts of a narrow resistance spectrum and limited number or even shortage of such resistance genes to many specific pathogens leave an immediate question to be resolved in such a situation.In light of the evidence that all compatible pathogens trigger a conserved and wide range of host genes,namely susceptibility genes for their proliferation,management of those genes are of equal importance and promising for improvement in crop disease resistance(Zaidi et al.,2018).

关键词： cultivar resistance narrow

Testing High-Dimensional Nonparametric Behrens-Fisher Problem

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Journal of Systems Science & Complexity 2022年第3期35卷 1098-1115页

作者： meng Zhen LI Na yuan Ao Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Department of Biostatistics Bioinformatics and BiomathematicsGeorgetown UniversityWashington 20057USA

For high-dimensional nonparametric Behrens-Fisher problem in which the data dimension is larger than the sample size,the authors propose two test statistics in which one is U-statistic Rankbased Test(URT)and another is Cauchy Combination Test(CCT).CCT is analogous to the maximumtype test,while URT takes into account the sum of squares of differences of ranked samples in different dimensions,which is free of shapes of distributions and robust to outliers.The asymptotic distribution of URT is derived and the closed form for calculating the statistical significance of CCT is given.Extensive simulation studies are conducted to evaluate the finite sample power performance of the statistics by comparing with the existing method.The simulation results show that our URT is robust and powerful method,meanwhile,its practicability and effectiveness can be illustrated by an application to the gene expression data.

关键词： Cauchy combination test nonparametric Behrens-Fisher problem rank-based test U-statistic

CMW-Net: an adaptive robust algorithm for sample selection and label correction

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National Science Review 2023年第6期10卷 19-23页

作者： Jun Shu Xiang yuan Deyu meng School of Mathematics and Statistics Xi'an Jiaotong University Ministry of Education Key Lab of Intelligent Networks and Network Security Xi'an Jiaotong University Peng Cheng Laboratory Pazhou Laboratory (Huangpu)

PROBLEM Deep neural networks (DNNs) have recently achieved impressive performance in various applications.Such successis largely attributed to massive but carefully labeled data expected to properly and sufficiently simulate testing environments.However,the data collection and annotation processes are often expensiveand time consuming,making obtained training datasets in real-life applications error prone,especially with data biasfrom ideal testing distributions.

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Competitive binary multi-objective grey wolf optimizer for fast compact antenna topology optimization

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Frontiers of Information Technology & Electronic Engineering 2022年第9期23卷 1390-1406页

作者： Jian DONG Xia yuan meng WANG School of Computer Science and Engineering Central South UniversityChangsha410083China

We propose a competitive binary multi-objective grey wolf optimizer(CBMOGWO)to reduce the heavy computational burden of conventional multi-objective antenna topology optimization problems.This method introduces a population competition mechanism to reduce the burden of electromagnetic(EM)simulation and achieve appropriate fitness values.Furthermore,we introduce a function of cosine oscillation to improve the linear convergence factor of the original binary multi-objective grey wolf optimizer(BMOGWO)to achieve a good balance between exploration and exploitation.Then,the optimization performance of CBMOGWO is verified on 12 standard multi-objective test problems(MOTPs)and four multi-objective knapsack problems(MOKPs)by comparison with the original BMOGWO and the traditional binary multi-objective particle swarm optimization(BMOPSO).Finally,the effectiveness of our method in reducing the computational cost is validated by an example of a compact high-isolation dual-band multiple-input multiple-output(MIMO)antenna with high-dimensional mixed design variables and multiple objectives.The experimental results show that CBMOGWO reduces nearly half of the computational cost compared with traditional methods,which indicates that our method is highly efficient for complex antenna topology optimization problems.It provides new ideas for exploring new and unexpected antenna structures based on multi-objective evolutionary algorithms(MOEAs)in a flexible and efficient manner.

关键词： Antenna topology optimization Multi-objective grey wolf optimizer High-dimensional mixed variables Fast design

Cross-border E-commerce and China's Exports during the COVID-19 Pandemic

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China & World Economy 2024年第3期32卷 215-242页

作者： Yi Che Meng Yuan Yan Zhang Lin Zhao School of Business East China University of Science and TechnologyChina School of Business Xiangtan UniversityChina School of Economics Shanghai University of Finance and EconomicsChina

China's exports experienced a rapid recovery after the outbreak of the 2019 COVID-19 pandemic.A primary engine was cross-border e-commerce(CBEC)trade,which bucked the downward export trend during the pandemic.By exploring the variation in the number of CBEC comprehensive pilot zones across provinces,we identified the causal impact of CBEC on exports using monthly province-product-destination data for 2019 and 2020.We found strong and robust evidence that CBEC contributed to exports during the pandemic by promoting the expansion of incumbent exports(intensive margin)rather than through the expansion of product categories and exporting partners(extensive margin).Specifically,higher pandemic risk suppressed the role of CBEC at the intensive margin while enhancing it at the extensive margin.Exports to developed countries benefited more from CBEC,both intensively and extensively.Compared with final products,a larger number of intermediate products were exported through CBEC after the outbreak of the pandemic.

关键词： China's exports COVID-19 pandemic cross-border e-commerce extensive margin of trade intensive margin of trade