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Novel WRKY transcriptional factors associated with NPR1 during systemic acquired resistance in barley are potential resources to improve wheat resistance to Puccinia triticina

Novel WRKY transcriptional factors associated with NPR1 duri...

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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： Li Huanpeng Wu Jiaojiao Gao Jing Bi Weishuai Yu Xiumei Liu Daqun Wang Xiaodong College of Plant Protection Biological Control Center for Plant Diseases and Plant Pests of HebeiHebei Agricultural University College of Life Science Hebei Agricultural University Graduate School of Chinese Academy of Agricultural Sciences

In Arabidopsis,both initial pathogen infection and benzothiadiazole(BTH) treatment are sufficient to induce systemic acquired resistance(SAR),which is an inducible form of enhanced resistance to secondary pathogen ***1 is reported to be the master regulator of *** Arabidopsis and rice,WRKY transcription factors are designated as key components during SAR in either NPR1-dependent or-independent *** several SAR-like responses discovered in wheat and barley can improve their resistance to various fungal diseases including Blumeria graminis and Puccinia triticina(Pt),roles of NPR1 and WRKY genes during SAR in these crop species are largely *** a series of transcriptome analysis on barley transgenic lines over-expressing wheat wNPR1(wNPR1-OE) and knocking down barley HvNPR1(HvNPR1-Kd),the regulatory networks of NPR1 during SAR triggered by Pseudomonas syringae *** DC3000 and BTH were clarified.A total of 17 differentially expressed WRKY genes were selected for further functional ***,some of them may also function through physical interaction with NPR1 *** transient expression of three novel WRKY genes,including HvWRKY165,HvWRKY213,and HvWRKY248,in wheat leaves by Agrobacterium-mediated infiltration enhanced the resistance to *** transgenic lines over-expressing these WRKY genes may be potential resources to improve wheat resistance to various fungal diseases.

关键词： WRKY transcription factors NPR1 Systemic acquired resistance Barley Wheat Puccinia triticina

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Bacillus atrophaeus strain HAB-5 promotes vegetative growth of tobacco and its secretion metabolites protect plants against tobacco mosaic virus infection

Bacillus atrophaeus strain HAB-5 promotes vegetative growth ...

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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： Mamy Jayne Nelly Rajaofera Jin Pengfei Shen Haiyan Hafiz Hasnain Nawaz Wang Yi He Qiguang Xu Liangxiang Cui Hongguang Liu Wenbo Miao Weiguo Institute of Tropical Agriculture and Forestry Hainan UniversityHainan Key Laboratory for Sustainable Utilization of Tropical Bioresource

Finding alternatives of synthetic pesticide for health and the safe environment has become a crucial issue for scientific research.A number of studies have reported efficacy of Bacillus species on promoting plant development,as well as protecting plants against pathogens invasion,especially pathogenic fungi and ***,little was known about Bacillus species in controlling viral *** this study,Bacillus atrophaeus strain HAB-5,isolated from soil of cotton field,Xinjiang,China,was able to efficiently promote the growth of tobacco plant in that the expansins genes NtEXPl and NtEXP2 in tobacco leaves after treatment with *** Tobacco mosaic virus(TMV)/Nicotiana tobacco system was employed to evaluate virus resistance induced by *** leaves were treated with antimicrobial metabolites of HAB-5 strain(lmg/mL),and 12 hours later the treated leaves were challenged with TMV via *** results showed that diseasing symptoms were obviously compromised in tobacco leaves treated with HAB-5,and viral accumulation levels were also greatly ***,it was found that the signaling regulatory gene(NPR1),defense genes(PR-1a,PR-1b,Chia5),and hypertensive response related genes(Hsr203J,Hinl) were up-regulated in plants treated with the ***,these accumulated results strongly supported the strain HAB-5 to be a biocontrol strain against TMV.

关键词： Bacillus atrophaeus Tobacco mosaic virus Biocontrol

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The research on transcription factor SsMCM1 and its interacting proteins in Sclerotinia sclerotiorum

The research on transcription factor SsMCM1 and its interact...

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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 Bowen Xu Tingtao Liu Ling Zhu Genglin Lv Xingming Liu Jinliang Zhang Xianghui Zhang Yanhua Pan Hongyu College of Plant Sciences Jilin University

Sclerotinia sclerotiorum(Lib.) de Bary is a challenging agricultural pathogen for management,causing large global economic losses *** this study,a MADS-box transcriptional factor SsMCM1 was cloned from ***,then SsMCM1 function was investigated using RNA *** results demonstrated that the transcription factor SsMCMl was involved in *** growth,development and *** two-hybrid and Bimolecular Fluorescent Complementary was been applied to identify proteins that physically associate with SsMCMl in *** putative SsMCMl interacting proteins were ***37 contains the Pmp3 family domain;SsIP43 contains the PGM3 family domain;SsIP44 contains the Mpvl7-PMP22 domain;SsIP86 contains the Catalase domain;SsIP98 contains the Cyclin domain;SsIP106 contains the RGL11 *** other interacting proteins function are ***28(SSIG2296) was cloned which highly homologous to yeast *** twohybrid assays indicate that Cdc28 physically interacts with ***99(SS1 G7136) contained an STE domain at the N terminus and a C2 H2 zinc finger domain at the C terminus,termed as SsSte12,the putative downstream transcription factor of MAPK pathway in *** SsSte 12 resulted in phenotypes of delayed vegetative growth,reduced size of sclerotia,and fewer appressoria ***,the SsSte12 RNAi mutants showed attenuated pathogenicity on the host plants due to the defect compound ***,the transcription factor SsMCM1 and its interacting proteins might play a critical role in the regulation of the genes encoding these traits in ***.

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Transcriptomic investigation of biocontrol agent PP19 induced resistance to *** on litchi fruit

Transcriptomic investigation of biocontrol agent PP19 induce...

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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： Li Zheng Situ JunJian Xi Pinggen Zhou Xiaofan Jiang Zide Department of Plant Pathology South China Agricultural University Chinese Academy of Tropical Agricultural Sciences Guangzhou Experimental Station Integrative Microbiology Research Centre South China Agricultural University

The production and fruit quality is severely affected by Litchi downy blight,caused by the oomycete Peronophythora litchii,which occurs in almost all thelitchi production regions of ***,there is urgent need for riskless and sustainable biocontrol *** we have shown that the biocontrol agent PP19(Bacillus licheniformis) and its associated VOCs could appear an efficacy to litchi downy *** elucidate the potential mechanism of PP19 induced resistance,we employed transcriptome sequencing to investigate the molecular mechanism of plant defense and *** transcriptome data showed that,upon pre-treatment with PP19,the expression levels of thousands of genes were significantly different from those in the control in the 36 hours period post inoculation(hpi).Meanwhile,pretreated PP19 could significandy alter the plant response to the pathogen *** was also found that,while the relative value of *** on the litchi pericarp were similar,from 0-12-24 hpi,a significant difference at 24-36 hpi where the control value was approximately 3 000 fold more than PP19 *** clustered the genes with absolute fold changes greater than1.5 based on their time-course expression patterns and found four clear *** gene ontology enrichment analyses showed that functions related to fructose metabolism,regulation of cell plasma membrane,ethanol biosynthesis,and regulation of defense response were over-represented in the four clusters,*** summary,PP19 can indeed induce the resistance of litchi fruits to ***,and might regulate some genes related to disease resistance and preservation to avoid plant browning and pathogen infection.

关键词： P.litchii Biocontrol agent PP19 Litchi fruit Transcriptomics

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MiR482 regulates the resistance of tomato to Phytophthora infestans by interacting with lncRNAs

MiR482 regulates the resistance of tomato to Phytophthora in...

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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： Jiang Ning Cui Jun Yang Guanglei Meng Jun Luan Yushi School of Life Science and Biotechnology Dalian University of Technology School of Computer Science and Technology Dalian University of Technology

Our previous studies showed that that a tomato lncRNA,lncRNA16397,could induce glutaredoxin expression to enhance resistance to ***,and miR482b was a negative regulator during tomato resistance to ***,the regulatory mechanisms between miR482and lncRNAsis *** this study,we wrote a program to identify 89 lncRNA-originated endogenous target mimics(eTMs) for 46 miRNAs from our RNA-Seq *** tomato lncRNAs,lncRNA23468,lncRNA01308 and lncRNA13262,contained conserved eTM sites for *** lncRNA23468 was overexpressed in tomato,miR482b expression was significantly decreased,and expression of its target genes,NBS-LRRs,was significantly increased,resulting in enhanced resistance to ***23468 silencing in tomato led to increased accumulation of miR482b and decreased accumulation of NBS-LRRs,as well as reduced resistance to *** accumulation of both miR482b and NBS-LRRs was not significandy changed in tomato plants overexpressing lncRNA23468 with a mutated eTM *** addition,we found that tomato miR482a could target another lncRNA,lncRNA 15492 using degradome data *** tomato plants that overexpressed the miR482a display more serious disease symptoms than wild-type tomato plants after infection with ***,silencing of miR482a were performed by sort tandem target mimic(STTM),resulting in enhancement of tomato resistance to *** addition,overexpression of lncRNA15492 in tomato plants also enhanced tomato *** results suggest that miR482a may regulated the resistance of tomato to *** by targeting lncRNA *** results will not only improve our understanding of the regulatory mechanism between miR482and lncRNAs in tomato response to *** infection but also help future molecular-based breeding approaches of pathogen resistance.

关键词： MiR482 regulates the resistance of tomato to Phytophthora infestans by interacting with lncRNAs

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The adaptation of Pytophthora infestans from different altitudes to UV light

The adaptation of Pytophthora infestans from different altit...

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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： Wang Yanping Wu Ejao OuYang Haibing Wang Tian Xie Jiahui Shen Linlin Zhan Jiasui Fujian Key Laboratory of Plant Virology Institute of Plant VirologyFujian Agricultural and Forestry University

Potato is one of the staple food crops in China,and it is becoming increasingly important with the implementation of staple food *** blight caused by Phytophthora infestans is the most devastating disease of potato,which occurs in all major growing areas all over the *** 1840 s,more than one million people died of starvation in Ireland and about two millions people migrated to other countries as a result of the famine caused by the spread of late blight *** occurrence and epidemic of potato late blight are closely related to the composition and adaptation of *** recent years,ozone depletion caused by air pollution,increased the intensity of ultraviolet irradiation on the *** of altitude on the UV adaptation of *** was explored the 150 distinct genotypes β0 from each altitude) were selected from 350 isolates collected from different five altitudes in Yunnan Province in *** project tried to analyses the effects of ultraviolet（UV） irradiation on the genetic diversity and spatial distribution of *** populations at different altitudes to clarify the composition and evolutionary mechanism of *** populations,and try to find the theoretical basis for the control of potato late *** results showed that the growth rate of *** was negatively correlated with the UV irradiation *** infestans at different altitudes had different adaptability to different UV irradiation *** from the lowest altitude had stronger resistance to UV *** population differentiation for UV adaptation(Q) value（0.221） for five altitudes was greater than the population differentiation for neutralSSR markers(F) value（0.164）.There was a significant positive correlation between the Q value of the two altitudes and the relative difference between the altitudes of the two altitudes（r = 0.662,P = 0.037 <0.05）.The pathogen area of *** at different altitudes increased first and

关键词： Phytophthora infestans Altitudes UV adaptability Phenotypic plasticity Genetic diversity QST/FST analysis

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两株引起柑橘果实腐烂病的病原菌鉴定

两株引起柑橘果实腐烂病的病原菌鉴定

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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：雷建姣谢甲涛程家森陈桃姜道宏付艳苹湖北省作物病害监测和安全控制重点实验室/华中农业大学农业微生物学国家重点实验室/华中农业大学

柑橘(Citrus)属芸香科植物,2017年我国种植面积超过257万公顷,产量达3 800万t以上,种植面积和产量都位居全球首位。在柑橘果实生长中后期、运输和贮藏期间,由病原真菌引起的烂果现象十分普遍,腐烂率通常为10%～30%,重者甚至高达50%,对... 详细信息

柑橘(Citrus)属芸香科植物,2017年我国种植面积超过257万公顷,产量达3 800万t以上,种植面积和产量都位居全球首位。在柑橘果实生长中后期、运输和贮藏期间,由病原真菌引起的烂果现象十分普遍,腐烂率通常为10%～30%,重者甚至高达50%,对我国柑橘产业造成了严重的经济损失。研究柑橘采后病害危害及其病原鉴定,对柑橘产业健康发展具有重要的指导作用。柑橘果实腐烂病在伦晚脐橙果上病状主要表现为果实皮褐化、坚硬、缩水,严重影响果实商品价值。前期对自湖北宜昌2017年采集的伦晚脐橙病果进行了组织分离,分离了获得了288株真菌菌株。本研究对其中两株真菌菌株LW45-1和LW43-2进行了分子鉴定及其生物学特性研究。基于ITS、EF-1α和β-tubulin基因序列构建系统进化树,表明菌株LW45-1、LW43-2与小新壳梭孢(Neofusicoccum parvum)聚为一枝,具有很近亲缘关系。28℃条件下在PDA上培养,LW45-1和LW43-2的菌落呈白色,着生大量气生菌丝。利用松针诱导菌株LW43-2和菌株LW45-1产孢,发现菌株LW43-2产孢困难,但菌株LW45-1可以产大量分生孢子。菌株LW45-1的分生孢子器壁黑色,分生孢子梗无色透明,着生在分生孢子器的内壁上,短棒状、有隔、顶端略尖,以全壁芽生方式产分生孢子;分生孢子纺锤形或椭圆形,薄壁、无隔、无色透明,且内有油球,分生孢子大小为(16.0～22.0)μm×(4.5～9.0)μm。这些特性与已报道的小新壳梭孢的形态特性趋于一致。结合分子生物学和形态学,鉴定菌株LW43-2和LW45-1为小新壳梭孢(***)。对菌株LW43-2和LW45-1生物学特性进行了研究。菌株LW43-2和LW45-1在15～35℃的范围内均能生长,30℃为菌丝最适生长温度。pH值适宜范围为4～7,最适pH为5。在PDA、OMA、MEA、WA、果肉+琼脂、果皮+琼脂和叶片+琼脂这7种不同培养基中,菌丝在PDA培养基上生长最快,在柑橘果皮+琼脂的培养基上生长最慢,且最早分泌墨绿色色素。致病力测定,发现菌株LW43-2和LW45-1不仅可以侵染果实引起腐烂,也可侵染柑橘叶片和枝干,这是首次报道小新壳梭孢可以引起柑橘果实腐烂病,为柑橘果实腐烂病的防治具有指导意义。

关键词：柑橘果实腐烂病病原鉴定

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Artificial microRNA-mediated resistance to Cucumber green mottle mosaic virus in Nicotiana benthamiana

Artificial microRNA-mediated resistance to Cucumber green 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： Liang Chaoqiong Hao Jianjun Li Jianqiang Barbara Baker Luo Laixin Department of Plant Pathology China Agricultural University/Key Laboratory of Plant PathologyMinistry of Agriculture Beijing Key Laboratory of Seed Disease Testing and Control China Agricultural University School of Food and Agriculture The University of Maine Department of Plant and Microbial Biology University of CaliforniaBerkeley Plant Gene Expression Center United States Department of AgricultureAgricultural Research Service

Cucumber green mottle mosaic virus(CGMMV) infects cucurbit plants and causes severe economic losses in crop *** artificial microRNAs(amiRNAs) targeting the genes,which responsible for viral replication,transmission and symptom expression,offers a promising strategy to interfere the multiplication and spread of CGMMV in *** this study,six amiRNAs were designed based on three Arabidopsis thaliana miRNA precursor backbones(ath-miR156a,ath-miR164a and athmiR171a),which targeting conservative sequence elements of CGMMV genes for coat protein(CP),movement protein(MP) and replicase gene(Rep).For analyzing CGMMV resistance level in Agrobacterium-infiltrated N,benthamiana plants,*** plants at 3 days post Agroiocterium-infiltration(dpa) were gently rubbed with CGMMV *** of the CGMMV-infected transgenic *** plants were observed at 20 days post inoculation(dpi).The results showed that transgenic Nicotiana benthamiana plants showed various levels of resistance against CGMMV,and the level of resistance was determined by the expression level of *** line expressing amiRNA targeted the CP gene induced the highest viral resistance,whereas targeting CGMMV replicase gene exhibited only a moderate tolerance,targeting the MP gene induced the lowest viral *** study demonstrated that amiRNA technology was an effective approach to engineer viral resistance in/*** biotechnological approach may have the potential to provide resistance sources for future crop breeding in the case of limited natural resistant resources.

关键词： Overexpression amiRNA technology Viral resistance Cucumber green mottle mosaic virus

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The complete genomic sequence of a novel megabirnavirus from Fusarium pseudograminearum,the causal agent of wheat crown rot

The complete genomic sequence of a novel megabirnavirus from...

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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 Xiaoting Gao Fei Zhang Fang Xie Yuan Zhou Lin Yuan Hongxia Zhang Songbai Li Honglian College of Plant Protection Henan Agricultural University Key Laboratory of Biopesticide and Chemical Biology Ministry of Education Fujian Agriculture and Forestry University College of Biological Science and Engineering Fuzhou University Engineering Research Centre of Ecology and Agricultural Use of Wetland Ministry of EducationYangtze University

A novel double-stranded RNA(dsRNA) mycovirus,named as Fusarium pseudograminearum megabimavirus 1(FpgMBV 1),was found from a hypovirulent strain FC136-2 A of Fusarium pseudograminearum,the causal agent of wheat crown *** complete genome of FpgMBV1 is comprised of two dsRNA segments,L1-dsRNA(8 951 bp) and L2-dsRNA(5 337 bp).Both of the dsRNAs carry two open reading frames on positive strand.L1-dsRNA potentially encodes a 131.3 kDa coat protein(CP) and a 126.3 kDa RNA-dependent RNA polymerase(RdRp),while L2-dsRNA encodes two putative proteins of 97.2 kDa and 30.6 kDa with unknown *** found in members of Megabirnaviridae,the 5' and 3' terminal sequences from L1-dsRNA and L2-dsRNA of FpgMBV1 are highly *** identity between L1-dsRNA(1 630 nt) and L2-dsRNA(1 682 nt) is 88.95%and the first 236 nts(1 ～236 nt) are exactly the *** the identity between 3' UTRs of L1-dsRNA(155 nt) and L2-dsRNA(109 nt) is 66.67%with exactly the same terminal hexamer sequences(5'-AAAAGC-3').Phylogenetic analyses based on the amino acid sequences of the RdRps indicated that FpgMBV1 is a new member within the family Megabirnaviridae.

关键词： dsRNA The complete genomic sequence of a novel megabirnavirus from Fusarium pseudograminearum,the causal agent of wheat crown rot agent

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Sequence polymorphism,gene transcriptional pattern and function analysis of the RXLR effector PcAvh2 from Phytophthora capsici

Sequence polymorphism,gene transcriptional pattern and funct...

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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： Chen Xiaoren Zhang Ye Huang Shenxin Xing Yuping Ji Zhaolin College of Horticulture and Plant Protection Yangzhou University

[Objective]The aim was to analyze the sequence polymorphism,gene transcriptional pattern and functions of the RXLR effector PcAvh2 from Phytophthora capsici.[Methods]We cloned PcAvh2 gene by high-fidelity PCR from 31 *** isolates,2 *** isolates and 1 *** *** expression changes during the developmental stages(mycelia,zoosporangia,zoospores and germinated cysts) and infection period(1.5 h,3 h,6 h,12 h,24 h,36 h,72 h post-inoculation) of *** were monitored by quantitative ***-based agroinfiltration assay was performed to examine if PcAvh2 could suppress plant immunity triggered by 6 effectors(BAX,INF1,PsojNIP,PsCRN63,PsAvh241 and R3 a/Avr3 a).The CaCl/PEG-raediated protoplast transformation of *** was conducted to silence PcAvh2 and determine if its silencing affected the pathogen's virulence.[Results]PcAvh2 is a typical RXLR effector and possesses 10 alleles in the ***,it also exists in *** and *** expression of PcAvh2 was up-regulated during the host infection by *** can suppress the plant immunity induced by all 6 ***1 y,silencing of PcAvhl in *** significantly compromised the pathogen's virulence on host plants.[Conclusion]RXLR effector PcAvh2 is one of important pathogenicity factors in ***.

关键词： Phytophthora capsici RXLR effector Sequence polymorphism RT-PCR Plant immunity Gene silencing

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