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我国不同产区桃褐腐病菌种类及致病因子分析

我国不同产区桃褐腐病菌种类及致病因子分析

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中国植物病理学会第十一届全国会员代表大会暨2018年学...

作者：谈彬朱薇张权曹军纪兆林董京萍童蕴慧徐敬友扬州大学园艺与植物保护学院

桃褐腐病在我国乃至全世界范围内广泛发生,造成严重的果实腐烂、损失严重。为明确我国桃主产区褐腐病菌的种类,本文从不同桃主产区采集褐腐病果,分离褐腐病菌,并进行了种类鉴定和致病性分析,同时初步分析了病菌胞壁降解酶活性。本文分别... 详细信息

桃褐腐病在我国乃至全世界范围内广泛发生,造成严重的果实腐烂、损失严重。为明确我国桃主产区褐腐病菌的种类,本文从不同桃主产区采集褐腐病果,分离褐腐病菌,并进行了种类鉴定和致病性分析,同时初步分析了病菌胞壁降解酶活性。本文分别从8个不同桃产区褐腐病果上单孢分离获得15个分离株。各分离株平板菌落形态略有差异,但来自云南的分离株与其他分离株明显不同。通过rDNA ITS序列及系统进化树分析,云南分离株与新种云南丛梗孢(Monilia yunnanensis)高度相似,而来源于其他产区的14株分离株均与果生链核盘菌(Moniliniafructicola)高度相似。本文同时分别采用Ioos等、Ma等、Cote等设计的特异性引物对上述15分离株特定区域(微卫星区、RAPD差异片段)序列进行PCR扩增与分析,结果与上述rDNA ITS鉴定结果一致。接种试验表明,不同产区来源的桃褐腐病菌在桃果上的致病力存在差异,其中来自浙江丽水、河北石家庄的分离株致病力较强,而来自山东泰安的分离株致病力相对较弱。本文还对不同产区桃褐腐病菌的致病因子胞壁降解酶进行了酶活性测定,结果表明,不同产区来源菌株间酶活性存在着一定的差异,但总体上PG和PMG的活性相对较高,最高的菌株可分别高达1 898.294U/mL和1 391.586U/mL,而纤维素酶Cx和β-1,3葡聚糖酶活性相对较低,只有234.665U/mL和254.107U/mL。因此,目前我国桃产区褐腐病菌主要以***为主,但不同产区来源的菌株间存在致病性差异,或可能与PG和PMG在致病过程中参与作用有关。

关键词：桃褐腐病果生链核盘菌 rDNAITS 特异性引物致病性胞壁降解酶

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Biological and transcriptomic studies reveal hfq is required for swimming,biofilm formation and stress response in Xanthomonas axonpodis ***

Biological and transcriptomic studies reveal hfq is required...

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中国植物病理学会第十一届全国会员代表大会暨2018年学...

作者： Liu Xuelu Yan Yuping Wu Haodi Zou Huasong Zhou Changyong Wang Xuefeng National Engineering Research Center for Citrus Citrus Research InstituteSouthwest University Chinese Academy of Agricultural Sciences

Hfq is a widely conserved bacterial RNA-binding protein which generally mediates the global regulatory involved in bacterial physiology and *** purpose of this study was to characterize the biological function of hfq gene in Xanthomonas axonpodis ***(Xac),the causal agent of citrus *** hfq mutant in Xac was generated by plasmid *** characterization showed that the loss of hfq resulted in the attenuated bacterial growth,swimming motility and biofilm *** addition,the hfq mutation impaired Xac resistance to HO and pH,while it did not contribute the virulence of *** sequencing(RNA-Seq) indicated that Hfq plays an important role in regulating the expression of 746 *** of genes enriched in pathways related to bacterial chemotaxis,bacterial secretion system,two-component system,quorum sensing and flagellar assembly were repressed,whereas the ribosome related genes were significantly up-regulated in hfq ***,three bacterial chemotaxis related genes and seven flagella genes were significantly repressed by transcriptome and RT-qPCR validation,supporting the biological results of the attenuation of cell growth and biofilm *** study demonstrated that hfq was involved in multiple biological processes in *** is a good starting point for identifying regulatory sRNAs and genes controlled by Hfq-sRNA interactions in Xac.

关键词： Xanthomonas axonpodis pv.citri hfq gene Biological function RNA sequencing

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Proteomics analysis of disease-resistant lily clones toward Fusarium oxysporum

Proteomics analysis of disease-resistant lily clones toward ...

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中国植物病理学会第十一届全国会员代表大会暨2018年学...

作者： Zhang Yiping Wang Jihua Qu Suping Yang Xiumei Xu Feng Zhang Lifang Wang Lihua Su Yan He Yueqiu Yunnan Agricultural University Flower Research Institute Yunnan Academy of Agricultural SciencesNational Engineering Research Center for Ornamental HorticultureYunnan Flower Breeding Key LaboratoryYunnan Flower Engineering Center

Lily blight,caused by the soil-borne pathogen Fusarium oxysporum ***,is one of the most serious diseases impacting lily production *** lily hybrid ' Casa Blanca' blightresistant clones were obtained by toxin *** elucidate the disease-resistance mechanisms of lily against *** ***,we performed the compared proteomics research in susceptible and resistant cultivars inoculated with the *** 2-DE and MALDI-TOF-TOF MS analysis,25 differentially expressed proteins were *** proteins can be categorized into 4 classes according to their *** were 6 differentially expressed defense-related proteins identified in the susceptible and resistant cultivar,including presumption of disease-resistance protein RPS2,putative late blight resistance protein homolog R1C-3,peroxidase Q,ascorbate peroxidase,putative ethylene-responsive protein,and NBS-LRR-like protein,which may play key roles in the resistance mechanisms against lily *** investigations are required to elucidate the complexities of the disease resistance mechanism.

关键词： Lily disease-resistant clones 2-DE Proteomics Fusarium oxysporum MALDI-TOF-TOF

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Comparative analysis of microbial community structure in the rhizosphere between soybean and oilseed rape by highthroughput pyrosequencing

Comparative analysis of microbial community structure in the...

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中国植物病理学会第十一届全国会员代表大会暨2018年学...

作者： Yang Xiaoxiang Liu Yong Zhang Lei Huang Xiaoqin Wu Wenxian Plant Protection Institute Sichuan Academy of Agricultural Science

Clubroot,caused by the soil-borne obligate pathogen Plasmodiophora brassicae,is one of the most severe disease on cruciferous ***,We found soybean as the preceding crop could reduce the occurrence of clubroot on oilseed rape by about 80%less than which in continuous rape *** Soil microbiome is important for growth promotion and disease *** this study,we compared the rhizosphere microbiome of soybean and oilseed rape rhizosphere soil collected from the same natural field using 16S rRNA and internal transcribed spacer(ITS) sequencing *** results showed that soybean rhizosphere shared features with oilseed rape rhizosphere soil,such as predominance of Proteobacteria,Bacteroidetes,Acidobacteria,Actinobacteria,Ascomycota,Zygomycota,Basidiomycota,Chytridiomycota and so *** some unique genera which have biological control and plant growth promotion functions such as Flavobacterium,Bradyrhizobium,Sphingomonas,Pseudomonas,Chitinophaga and Enterobacter were more abundant in soybean rhizosphere than oilseed rape rhizosphere soil,indicating that may be account for the reduced occurrence of clubroot on oilseed rape when soybean as the preceding *** results showed the important relationship between rhizosphere microbiome and clubroot and provided some potential bio-control resources for clubroot prevention.

关键词： Comparative analysis of microbial community structure in the rhizosphere between soybean and oilseed rape by highthroughput pyrosequencing

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Expression analysis of groEL of Candidatus Liberibacter asiaticus and antibody preparation

Expression analysis of groEL of Candidatus Liberibacter asia...

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中国植物病理学会第十一届全国会员代表大会暨2018年学...

作者： Zhou Chenghua Huang Yuling Yu Haizhong Liu Yingxue Ding Peng Lu Zhanjun National Navel Orange Engineering Research Center Gannan Normal University

The Asiatic citrus psyllid,Diaphorina citri Kuwayama is the main vector of the huanglongbing(HLB).HLB isan unculturable vascular citrus pathogen transmitted from infected to healthy plants through grafting or by citrus psyllids,which is a phloem-limited bacterium " Candidatus Liberibacter asiaticus(CLas) ".In recent years,the worldwide citrus production has been seriously compromised result from ***,it is very important to insight into the spreading mechanism of HLB within *** current study,we cloned a molecular chaperone GroEL from *** analysis revealed that the full-length sequence of groEL was 1 656 bp and encoded a protein of 551 amino acids with a deduced molecular weight of 60 *** transcription quantitative PCR(RT-qPCR)analysis suggested that high groEL expression level was only found in CLas-infected ***,there was significant positive correlation between the relative expression of groEL and the abundance of CLas within *** addition,recombinant groEL was expressed and purified by prokaryotic expression system,and prepared the polyclonal *** antibody titer was 1:51 200 according to elisa analysis,indicating a good *** results will lay a foundation for further research on the interaction between HLB and ***.

关键词： Chaperone GroEL Diaphorinacitri RT-qPCR Polyclonal antibody

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Role of SNARE protein FgSec22 in growth,conidiation,sexual reproduction and pathogenicity of Fusarium graminearum

Role of SNARE protein FgSec22 in growth,conidiation,sexual r...

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中国植物病理学会第十一届全国会员代表大会暨2018年学...

作者： Muhammad Adnan Zheng Yangling Zheng Wenhui Lu Guodong State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops Fujian Agriculture and Forestry University

SNAREs(Soluble N-ethylmaleimide-sensitive factor attachment protein receptors) facilitate intracellular vesicle trafficking and cellular membrane fusion in eukaryotic cells,and play vital role in growth and development of phyto-pathogenic fungi such as Fusarium graminearum,the causal agent of Fusarium Head Blight(FHB) in wheat and *** is considered to involve particular SNARE-mediated transport and secretion of fungal effector proteins to shatter host *** have characterized a SNARE protein FgSec2 from ***,its phylogenetic analysis and domain characterization reveal that it is a putative homolog of SNARE protein Sec22 of Saccharomyces cerevisiae,MoSec22 of Magnaporthe *** have observed that FgSec22 plays predominant role in maintenance of normal hyphae,vegetative growth,conidiation,germ tube polarity,sexual reproduction,and pathogenicity of ***22 also plays role in mycotoxin Deoxynivalenol(DON) production in ***22 domain characterization revealed that it contains longin domain,coiled coil region and transmembrane domain which are conserved in controlling protein function and *** study indicates that SNARE protein FgSec22 is involved in regulatory mechanisms which administer growth,differentiation and virulence of plant pathogenic fungi ***.

关键词： SNARE protein Fusarium graminearum Phenotypic characterization DON Pathogenicity

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F-box like motif of CCYV P22 is crucial for silencing suppressor activity by interacting with CsSkp1LB1

F-box like motif of CCYV P22 is crucial for silencing suppre...

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中国植物病理学会第十一届全国会员代表大会暨2018年学...

作者： Wei Yin Han Xiaoyu Chen Siyu Shi Yan College of Plant Protection Henan Agricultural University

Plants employ RNA silencing as a virus defense *** response,viruses encode various RNA silencing suppressors to counteract the antiviral ***,we identify P22 as a silencing suppressor of CCYV and show that P22 interacts with Cucurmis sativus orthologs of S-phase kinase related protein 1（SKP1） via its F-box like *** F-box like motif deletion mutant of P22 abolished P22 pathogenicity and silencing suppressor *** analysis of Nicotiana benthamiana leaves expressing P22 and its F-box like motif deletion mutant further confirmed indispensibilty of F-box like motif for the ubiquitin mediated proteolysis and methionine metabolism.S-adenosyl--methionine synthase（SAMS）,a key enzyme for HEN1 activity,was undetectable in P22 expressing leaves while expressed in its deletion *** together,our results suggest that P22 acts as silencing suppressor possibly via depriving HEN1 of its substrate S-adenosyl--methionine（SAM） through the ubiquitin mediated proteolysis.

关键词： Cucurbit chlorotic yellows virus Silencing suppressor Ubiquitin SKP1 F-box Proteomic analysis

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杧果炭疽病菌CgCBHⅠ基因序列特征分析与敲除载体构建

杧果炭疽病菌CgCBHⅠ基因序列特征分析与敲除载体构建

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中国植物病理学会第十一届全国会员代表大会暨2018年学...

作者：周芳雪吴秋玉钟昌开李鸿鹏张贺蒲金基刘晓妹海南大学热带农林学院/海南大学热带作物种质资源保护与开发利用教育部重点实验室中国热带农业科学院环境与植物保护研究所/农业部热带作物有害生物综合治理重点实验室

杧果（Mangifera indica L.）是世界五大著名的热带水果之一,气味香甜口感好具有较高的保健功效。炭疽病是为害杧果的重要病害之一,在国内外杧果产区普遍发生,胶孢炭疽菌（Colletotrichum gloeosporioides Penz.&Sacc）是引起杧果... 详细信息

杧果（Mangifera indica L.）是世界五大著名的热带水果之一,气味香甜口感好具有较高的保健功效。炭疽病是为害杧果的重要病害之一,在国内外杧果产区普遍发生,胶孢炭疽菌（Colletotrichum gloeosporioides Penz.&Sacc）是引起杧果炭疽病的主要病原菌,此病严重影响杧果的产量和品质,是限制杧果产业发展的主要因素之一。本研究在杧果炭疽病菌中克隆获得了外切葡聚糖酶CgCBHI基因,进行敲除载体构建,明确其生物学功能,为揭示外切葡聚糖酶CgCBHI基因在杧果炭疽病菌在侵染寄主过程中的致病机制打下基础。从杧果炭疽病菌基因组中扩增CgCBHI基因DNA和cDNA,采用TMHMM软件等分析CgCBHI基因的生物信息学;将CgCBHI基因的5端片段、3端片段与gfp:hygB基因片段融合重组至以pUC19T载体上,PCR验证、测序获得的敲除载体。CgCBHI基因DNA全长1 746bp,编码的CDS全长1 584bp,编码527个氨基酸,分子量约为55.32kDa,等电点（PI）为5.55,含1个纤维素酶保守结构域,不存在跨膜结构,存在1个信号肽,属于分泌型蛋白;其二级结构中α-螺旋占15.37%,延伸链占18.03%,β-转角占4.55%,无规则卷曲占62.05%,与*** Nara gc5外切葡聚糖酶基因的氨基酸序列（XP07283944.1）相似度达89%。CgCBHI基因敲除载体pCgCBHIGH-1构建成功。杧果炭疽病菌CgCBH I基因编码外切葡聚糖酶,是一种分泌型蛋白,CgCBHI基因敲除载体构建成功。

关键词：杧果炭疽病菌外切葡聚糖酶基因CgCBHⅠ 克隆序列特征分析敲除载体功能

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Functional characterization of miR1320 in response to both Xanthomonas oryzae *** infection and nitrogen deficiency in rice

Functional characterization of miR1320 in response to both X...

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中国植物病理学会第十一届全国会员代表大会暨2018年学...

作者： Hu Jixiang Chen Huamin Tian Fang Yu Chao Yang Fenghuan He Chenyang State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural sciences

Plant microRNAs play important roles in response to biotic and abiotic stress ***1320,a rice specific small RNA,is induced by bothXanthomonas oryzae ***(Xoo) infection and nitrogen deficiency,which was identified by deep sequencing and qRT-PCR *** of miR1320 in rice promoted plant growth and enhanced the immune responses to Xoo infection regardless of normal or low nitrogen *** lesions caused by Xoo were much shorter on miR1320 OE rice than on wild *** acid colorimetry and ninhydrin chromogenic method was used to determine the nitrogen and total amino acid content *** results showed that these contents of stem and root in OE rice are higher than those in *** addition,we demonstrated that a WRKY transcript(LOCs08 g09800.1) was a target of miR1320 by qRT-PCR and LUC-reporter *** is generally known that WRKY transcriptional factors modulate many seemingly disparate processes in ***,miR1320 may positive regulate disease resistance against Xoo and adaption to nitrogen deficiency through modulating LOC.s08 g09800.1 gene expression in rice.

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Omics analysis of maize seedlings responding to Sugarcane mosaic virus infection

Omics analysis of maize seedlings responding to Sugarcane mo...

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中国植物病理学会第十一届全国会员代表大会暨2018年学...

作者： Du Kaitong Jiang Tong Chen Hui Fan Zaifeng Zhou Tao Department of Plant Pathology China Agricultural University

Maize dwarf mosaic disease caused by Sugarcane mosaic virus(SCMV) has serious damage to maize production in China and *** and iTRAQ methods were used separately to determine the transcriptome and proteome of the shoots of SCMV-infected B73 maize seedlings at both early infection stage(three days post inoculation,3 dpi) and stable symptoms stage(9 dpi).Analysis of transcriptome data using a generalized linear model revealed that the majority of differentially expressed genes(DEGs) in maize seedlings responding to SCMV infection had appeared at 3 dpi rather than at 9 dpi,and most of these DEGs were significantly *** newly emerged DEGs at 9 dpi showed randomness and did not form clear enrichment of KEGG *** most of differentially expressed proteins(DEPs) in maize seedlings responding to SCMV infection appeared at 9 *** of the proteome and transcriptome data revealed that DEGs were not necessarily correlated to DEPs and vice ***,enrichments of many DEGs and DEPs were observed in RNA-splicing ***,489 genes with differentially usage of exons were found at the post-transcriptional level,indicating that post-transcriptional regulation occurred in maize seedlings responding to SCMV infection.

关键词： Omics analysis of maize seedlings responding to Sugarcane mosaic virus infection

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