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Digital Gene Expression Analysis of Huanglongbing Affected Mandarins(Citrus reticulata Blanco)In Response to Thermotherapy

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Horticultural Plant Journal 2021年第1期7卷 1-12页

作者： Ruixuan Pan Yanling Chen Xiaoling Deng meirong xu Laboratory of Citrus Huanglongbing Research Guangdong Key Laboratory of Microbial Signals and Disease ControlSouth China Agricultural UniversityGuangzhou 510642China

Huanglongbing(HLB),which is mainly associated with“Candidatus Liberibacter asiaticus”(CLas),is currently threatening citrus production around the *** destructive century-old disease results in callose deposition in phloem plasmodesmata and starch overaccumulation in leaf *** treatment with high humidity has proven to be effective in eliminating the CLas titers in potted citrus *** study explored the curative mechanisms and impact of heat treatment(from 32 to 48°C with 75%±5%relative humidity,14h in light and 10h in dark for four days)on mandarin trees(Citrus reticulata Blanco)that were severely infected by CLas using Solexa/Illumina’s digital gene expression(DGE)profiling.A total of 838 differentially expressed genes(DEGs)were identified,of which 510 were *** interaction analysis of the DEGs indicated that the thermotherapy of HLB trees downregulated the circadian clock related genes in chloroplasts and upregulated the RNA-editing process in the mitochondria,characterized by 141 genes encoding pentatricopeptide repeatcontaining proteins(PPR)being all ***,the expression of phenylpropanoid and flavonoid biosynthesis genes,and auxininduced genes were *** defense response pathway of the thermotherapy treated diseased trees was apparently disrupted,as indicated by the downregulation of LRR receptor-like serine/threonine-protein kinase FLS2 *** study improves our understanding of the curative mechanisms of heat treatment on HLB trees and CLas biological ***,this provides new insights on the involvement of RNA modification by PPR genes and changes in the circadian clock after the heat stress treatment of CLas-infected citrus.

关键词： Citrus huanglongbing heat transcriptom differentially expressed genes

Stability and stabilization for a class of fractional-order linear time-delay systems 36

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Stability and stabilization for a class of fractional-order ...

第36届中国控制会议

作者： ZHAO Yige xu meirong School of Mathematical Sciences University of Jinan

ISBN: (纸本)9781538629185

Using the fractional Razumikhin theorem,this paper investigates the stability and the stabilization of fractional-order linear time-delay systems,and presents a number of new ***,a sufficient condition of asymptotical stability for the fractional-order linear time-delay systems is given by the fractional Razumikhin ***,by designing state feedback controller for the fractional linear time-delay controlled systems,asymptotical stabilization for closed-loop systems is ***,two illustrative examples are provided to illustrate main results.

关键词： Fractional-order system Time-delay system Stability Stabilization Fractional Razumikhin theorem

A Matrix Approach to List Coloring problems 36

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A Matrix Approach to List Coloring problems

第36届中国控制会议

作者： meirong xu Yige Zhao School of Mathematical Sciences University of Jinan

ISBN: (纸本)9781538629185

This paper investigates the list coloring problem, and presents a number of new results and algorithms. By using the matrix semi-tensor product, the list coloring problem is studied, and three necessary and sufficient conditions are proposed, based on which an algorithm is designed to find all the list coloring schemes for any simple graph. In addition, the effectiveness of the results/algorithms presented in this paper is shown by one illustrative example.

关键词： List coloring Algorithm Semi-tensor product

Characterization of Xanthomonas citri *** from China based on spoligotyping

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Horticultural Plant Journal 2022年第6期8卷 727-736页

作者： Wenting Li Zhenxi Li Jiaquan Huang meirong xu Zheng Zheng Xiaoling Deng Guangdong Province Key Laboratory of Microbial Signals and Disease Control College of Plant ProtectionSouth China Agricultural UniversityGuangzhou 510642China

Xanthomonas citri ***(Xcc),a gram-negative bacterium,is the causal agent of citrus canker,one of the most devastating diseases threatening the citrus industry *** the diversity and population structure of Xcc is a prerequisite for disease epidemiological monitoring and effective disease *** characterization of the clustered regularly interspaced short palindromic repeats(CRISPR)/cas(CRISPR-associated proteins genes)system with a highly variable repeat number among species provides a new molecular typing method for bacterial genetic *** this study,we performed systematic in silico analyses of 28 Xcc genomes and identified a credible CRISPR/cas in Xcc *** analysis of CRISPR polymorphisms(repeat number and spacer types)in 129 Xcc A strains collected from six provinces in China identified 15 types of CRISPR arrays with 25 *** analysis of Xcc strains based on the CRISPR locus produced a more reliable and accurate typing result compared to the commonly used *** addition,seven associated cas genes—cas1,cas2,cas3,cas4,cas5,cas7(csd2),and cas8(csd1)—were found located adjacent to the CRISPR *** results showed>99%similarity of seven cas genes among Xcc *** analysis of spacer sequences showed that six spacers had possible phage/prophage *** characterization of the CRISPR/cas system among Xcc strains provided an updated strain typing method for Xcc diversity analysis and yielded a panoramic view of CRISPR evolution for further studies of Xcc-phage interactions.

关键词： Xanthomonas citri pv.citri CRISPR Diversity Spacers Typing method

Comparison of different grafting methods on the effect of‘Candidatus Liberibacter asiaticus'transmission

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Fruit Research 2022年第1期2卷 140-146页

作者： Xiaoqing Cui Jingtian Zhang Yangyang Liu Xiaoling Luo Xiaoling Deng Sumiao Zhang meirong xu Guangdong Province Key Laboratory of Microbial Signals and Disease Control Citrus Huanglongbing Research LaboratorySouth China Agricultural UniversityGuangzhou 510642China Plant Protection Station of Deqing County in Guangdong Deqing 526600China

Grafting is a commonly used method for citrus propagation and transmitting'Candidatus Liberibacter asiaticus'(CLas),the putative causing agent of citrus Huanglongbing(HLB).Optimization of the grafting inoculation methods facilitates the material preparation in HLB *** buds with CLas were grafted onto healthy sour tangerine(Citrus sunki *** Tanaka)seedlings by different methods such as top grafting(‘T'grafting and‘V'grafting)and side grafting(abdominal grafting).Along with the symptom observation,titers of CLas in the leaves were detected by RTqPCR *** correlation between the growth status of buds or different grafting methods and the success rate of HLB transmission were *** results suggest that sufficient DNA could be extracted to accurately detect the CLas from even only 0.0125 g leaf midrib or branch *** probability of CLas transmission was higher in plants inoculated with buds in better growth *** success rate of‘T'grafting was significantly higher than that of side grafting and‘V'***,in terms of HLB transmission efficiency,the two-bud grafting scheme was superior to the single-bud and three-bud grafting *** conclusion,the grafting combinations with the highest HLB transmission efficiency were screened to provide a methodological reference for the practice or research of grafting to obtain plant material.

关键词： material conditions. grafting

The L（2,1）-labeling Problem via the Semi-tensor Product Method

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The L（2,1）-labeling Problem via the Semi-tensor Product Me...

第37届中国控制会议

作者： meirong xu Liying Sun School of Mathematical Sciences University of Jinan

This paper investigates the L（2,1）-labeling problem,and presents a number of new results and ***,the distance problem is considered,and a necessary and sufficient condition is ***,using semi-tensor product,two sufficient and necessary conditions for the solvability of the L（2,1）-labeling problem are obtained,based on which a new algorithm is designed to find all the feasible L（2,1）-labeling schemes for any simple ***,study of one illustrative example is shown the effectiveness of the results/algorithms presented in this paper.

关键词： L(2,1)-labeling Algorithm Semi-tensor product

A Matrix Approach to Dynamic Coloring Problem

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A Matrix Approach to Dynamic Coloring Problem

第40届中国控制会议

作者： meirong xu Liying Sun School of Mathematical Sciences University of Jinan School of Business Shanghai Dian Ji University

A dynamic coloring of a graph G is a proper coloring such that for each vertex v with degree at least 2, the neighbors of v receive at least two different colors. This paper investigates the dynamic coloring problem and presents a number of new results and algorithms. By defining a logical operator and using the semi-tensor product method, four necessary and sufficient conditions are proposed for the solvability of the dynamic coloring problem, based on which a new algorithm to find all the feasible dynamic coloring schemes for any simple graph is put forward. Moreover, one illustrative example is studied to show the effectiveness of the results/algorithms presented in this paper.

关键词： Dynamic coloring Algorithm Semi-tensor product

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公共图书馆志愿者队伍管理的改进

图书馆杂志 2007年第6期26卷 32-33,35页

作者：许美荣复旦大学图书馆

公共图书馆志愿者管理工作是在解决其面临问题的过程中不断完善的。本文结合笔者自身实践,对公共图书馆志愿者管理工作中存在的问题进行分析,并提出相应对策。

关键词：公共图书馆志愿者志愿者管理

Finite-time Parallel Simultaneous Stabilization for Two Nonlinear Descriptor Systems

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Finite-time Parallel Simultaneous Stabilization for Two Nonl...

第37届中国控制会议

作者： Li Meiqing Sun Liying Zhao Yige xu meirong School of Mathematics Science University of Jinan

This paper investigates the finite-time parallel simultaneous stabilization problem for two nonlinear descriptor ***,we provide a sufficient condition which can guarantee to impulsefree of descriptor ***,by constructing a suitable Lyapunov function and designing an effective output feedback controller,we combine two nonlinear descriptor systems to generate an augmented nonlinear descriptor system such that the system can be proved the finite-time ***,a numerical example is presented to demonstrate the effectiveness of the proposed approach and the simulation results are showed in this paper.

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