Plant Pathology最新文献

筛选
英文 中文
Evolution of decreased sensitivity to azole fungicides in western European populations of Plenodomus lingam (Phoma stem canker on oilseed rape) 西欧油菜茎腐病菌 Plenodomus lingam 种群对唑类杀菌剂敏感性降低的演变过程
IF 2.7 3区 农林科学
Plant Pathology Pub Date : 2024-03-27 DOI: 10.1111/ppa.13897
Kevin M. King, Leo Barr, Louise Bousquet, Anna Glaab, Gail Canning, Faye Ritchie, Steven Kildea, Bart A. Fraaije, Jonathan S. West
{"title":"Evolution of decreased sensitivity to azole fungicides in western European populations of Plenodomus lingam (Phoma stem canker on oilseed rape)","authors":"Kevin M. King, Leo Barr, Louise Bousquet, Anna Glaab, Gail Canning, Faye Ritchie, Steven Kildea, Bart A. Fraaije, Jonathan S. West","doi":"10.1111/ppa.13897","DOIUrl":"https://doi.org/10.1111/ppa.13897","url":null,"abstract":"<jats:italic>Plenodomus lingam</jats:italic> (<jats:italic>Leptosphaeria maculans</jats:italic>) and <jats:italic>P. biglobosus</jats:italic> (<jats:italic>L. biglobosa</jats:italic>) are fungi causing Phoma leaf spot/stem canker, an international damaging disease of oilseed rape (<jats:italic>Brassica napus</jats:italic>) and other brassicas. In Europe, fungicides used for disease management are mainly sterol 14α‐demethylase (<jats:italic>CYP51</jats:italic>) inhibitors (DMIs/azoles); quinone‐outside inhibitors (QoIs) and succinate dehydrogenase inhibitors (SDHIs) are also used. Decreased DMI sensitivity has emerged in Australian and eastern European <jats:italic>P. lingam</jats:italic> populations and is mediated by <jats:italic>CYP51</jats:italic> promoter inserts resulting in target site overexpression. In this study using in vitro sensitivity testing, we report decreased DMI (prothioconazole‐desthio, mefentrifluconazole) sensitivity in modern western European <jats:italic>P. lingam</jats:italic> isolates (collected 2022–2023) compared to older baseline (1992–2005) isolates. Around 85% of modern western European <jats:italic>P. lingam</jats:italic> isolates collected, for which the <jats:italic>CYP51</jats:italic> promoter region was sequenced, carried a promoter insert, but target site alterations were not detected. Six different <jats:italic>CYP51</jats:italic> promoter inserts were identified, most commonly a 237 bp fragment of the <jats:italic>Sahana</jats:italic> transposable element. Inserts were associated with an approximately 3‐ to 10‐fold decrease in sensitivity to the DMIs tested. In contrast to <jats:italic>P. lingam</jats:italic>, PCR screening revealed <jats:italic>CYP51</jats:italic> promoter inserts were absent in modern western European <jats:italic>P. biglobosus</jats:italic> isolates (2021–2023). Combined data indicate <jats:italic>P. lingam</jats:italic> isolates lacking an insert were similarly (or slightly more) sensitive to the DMIs tested for <jats:italic>P. biglobosus</jats:italic>, whereas those carrying an insert were slightly less sensitive than <jats:italic>P. biglobosus</jats:italic>. No evidence for substantive sensitivity shifts to the QoI (pyraclostrobin) or SDHI (boscalid) fungicides tested was obtained for either <jats:italic>Plenodomus</jats:italic> species.","PeriodicalId":20075,"journal":{"name":"Plant Pathology","volume":"59 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140312688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Genome‐wide mapping in an international isolate collection identifies a transcontinental erg11/CYP51 promoter insertion associated with fungicide resistance in Leptosphaeria maculans 在一个国际分离物收集中进行全基因组测绘,确定了与大斑栉水母菌杀真菌剂抗性有关的跨洲erg11/CYP51启动子插入物
IF 2.7 3区 农林科学
Plant Pathology Pub Date : 2024-03-27 DOI: 10.1111/ppa.13898
Jack L. Scanlan, Alexander Idnurm, Angela P. Van de Wouw
{"title":"Genome‐wide mapping in an international isolate collection identifies a transcontinental erg11/CYP51 promoter insertion associated with fungicide resistance in Leptosphaeria maculans","authors":"Jack L. Scanlan, Alexander Idnurm, Angela P. Van de Wouw","doi":"10.1111/ppa.13898","DOIUrl":"https://doi.org/10.1111/ppa.13898","url":null,"abstract":"Fungicide resistance is often conferred through the mutation of genes encoding fungicide targets or proteins that remove fungicides from cells, but mechanisms can vary widely between taxa. Discovering the specific resistance alleles present in pathogen populations is essential for monitoring the evolution and movement of resistant genotypes. In this study, we explored the genomic basis of demethylase inhibitor (DMI) resistance in <jats:italic>Leptosphaeria maculans</jats:italic>, the main pathogen of the canola crop <jats:italic>Brassica napus</jats:italic>. Using an international collection of over 200 genome‐sequenced isolates, we assayed in vitro sensitivity to the DMI tebuconazole and conducted a genome‐wide association study on a variant set including single‐nucleotide polymorphisms (SNPs), small indels and structural variants. The main resistance allele identified was a 237 bp remnant transposable element insertion in the promoter of the <jats:italic>erg11</jats:italic>/<jats:italic>CYP51</jats:italic> DMI target gene in a large proportion of isolates from Europe, an allele known to confer DMI resistance in Australia. Several associated loci were identified, none of which are commonly linked to DMI resistance in other phytopathogens. We also found little to no relationship between DMI tolerance and baseline growth rate, suggesting minimal fitness effects of fungicide resistance in these isolates. This study indicates common DMI resistance alleles in <jats:italic>L</jats:italic>. <jats:italic>maculans</jats:italic> are shared across continents and <jats:italic>erg11</jats:italic>/<jats:italic>CYP51</jats:italic> coding mutations, which are near‐ubiquitous in other fungal pathogens, may not underpin DMI resistance in this species. Furthermore, that resistance occurs frequently in numerous canola‐growing regions suggests management is essential for growers.","PeriodicalId":20075,"journal":{"name":"Plant Pathology","volume":"14 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Botryosphaeria dothidea causes stem canker of Idesia polycarpa in China Botryosphaeria dothidea 在中国引起多肉植物茎腐烂病
IF 2.7 3区 农林科学
Plant Pathology Pub Date : 2024-03-23 DOI: 10.1111/ppa.13895
Lisha Fang, Tianjiao Zheng, Jian Feng, Wenyan Zhi, Yanmei Wang, Zhi Li, Qifei Cai, Xiaodong Geng, Zhen Liu
{"title":"Botryosphaeria dothidea causes stem canker of Idesia polycarpa in China","authors":"Lisha Fang, Tianjiao Zheng, Jian Feng, Wenyan Zhi, Yanmei Wang, Zhi Li, Qifei Cai, Xiaodong Geng, Zhen Liu","doi":"10.1111/ppa.13895","DOIUrl":"https://doi.org/10.1111/ppa.13895","url":null,"abstract":"<jats:italic>Idesia polycarpa</jats:italic> is a woody oil plant with great development and application prospects. However, stem canker disease of <jats:italic>I. polycarpa</jats:italic> was frequently observed in Henan and Hubei provinces of China in 2020–2022. The seriousness of the disease caused a large number of trees deaths, which affected seedling production and fruit yield, restricting the development of the <jats:italic>I</jats:italic>. <jats:italic>polycarpa</jats:italic> industry. We performed isolation, purification and pathogenicity analysis of canker samples. Pathogenicity tests reproduced typical canker disease symptoms on detached branches of <jats:italic>I</jats:italic>. <jats:italic>polycarpa</jats:italic>. Based on morphological observations, conidial morphology and phylogenetic analysis of isolates with high similarity to the rDNA internal transcribed spacer (ITS), <jats:italic>EF‐1α</jats:italic> and <jats:italic>TUB2</jats:italic> sequences screened in GenBank by BLAST, the pathogen of canker disease on <jats:italic>I</jats:italic>. <jats:italic>polycarpa</jats:italic> was identified as <jats:italic>Botryosphaeria dothidea</jats:italic>. This is the first report of <jats:italic>B</jats:italic>. <jats:italic>dothidea</jats:italic> as the pathogen of stem canker of <jats:italic>I</jats:italic>. <jats:italic>polycarpa</jats:italic>.","PeriodicalId":20075,"journal":{"name":"Plant Pathology","volume":"48 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140200057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Identification of candidate RXLR effectors from downy mildew of foxtail millet pathogen Sclerospora graminicola and functional analysis of SG_RXLR41 从狐尾黍霜霉病病原体 Sclerospora graminicola 中鉴定候选 RXLR 效应子并对 SG_RXLR41 进行功能分析
IF 2.7 3区 农林科学
Plant Pathology Pub Date : 2024-03-20 DOI: 10.1111/ppa.13899
Nuo Zhang, Zhixian Ren, Jinye Wang, Linjie Nan, Yurong Sun, Baojun Zhang, Jichun Jia
{"title":"Identification of candidate RXLR effectors from downy mildew of foxtail millet pathogen Sclerospora graminicola and functional analysis of SG_RXLR41","authors":"Nuo Zhang, Zhixian Ren, Jinye Wang, Linjie Nan, Yurong Sun, Baojun Zhang, Jichun Jia","doi":"10.1111/ppa.13899","DOIUrl":"https://doi.org/10.1111/ppa.13899","url":null,"abstract":"Downy mildew caused by <jats:italic>Sclerospora graminicola</jats:italic> is a systemic disease that affects the yield and quality of foxtail millet. This obligate biotrophic oomycete manipulates host physiology and immune processes through numerous effectors. A thorough comprehension of effector biology is crucial to unravel disease mechanisms and understand host plant resistance. In this study, bioinformatic analyses revealed 498 potentially secreted proteins in <jats:italic>S</jats:italic>. <jats:italic>graminicola</jats:italic>, of which 62 were identified as RXLR effectors; 46 RXLR‐encoding genes exhibited upregulated expression during the early stages of infection. To elucidate the functions of these secreted proteins, a heterogeneous expression system was developed using <jats:italic>Nicotiana benthamiana</jats:italic>. Twenty‐one RXLR effectors secreted by <jats:italic>S</jats:italic>. <jats:italic>graminicola</jats:italic> were transiently expressed in <jats:italic>N</jats:italic>. <jats:italic>benthamiana</jats:italic>, of which four could suppress INF1‐triggered cell death. Various defence responses in <jats:italic>N</jats:italic>. <jats:italic>benthamiana</jats:italic> were attenuated, including inhibition of defence gene expression, reduction of reactive oxygen species (ROS) accumulation and diminished callose deposition. The expression of SG_RXLR41 also enhanced the growth of <jats:italic>Phytophthora capsici</jats:italic> on <jats:italic>N</jats:italic>. <jats:italic>benthamiana</jats:italic> leaves. These findings indicate that <jats:italic>S</jats:italic>. <jats:italic>graminicola</jats:italic> facilitates infection and expansion through the secretion of multiple RXLR effectors, and SG_RXLR41 is an important virulence‐related effector that is involved in manipulating plant immunity by suppressing cell death.","PeriodicalId":20075,"journal":{"name":"Plant Pathology","volume":"23 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140200101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
No safe haven: Loss of avirulence in the plant pathogen Leptosphaeria maculans by DNA duplication and repeat‐induced point mutation 没有避风港通过 DNA 复制和重复诱导点突变使植物病原体 Leptosphaeria maculans 丧失无毒性
IF 2.7 3区 农林科学
Plant Pathology Pub Date : 2024-03-16 DOI: 10.1111/ppa.13889
Alexander Idnurm, Alec J. McCallum, Angela P. Van de Wouw
{"title":"No safe haven: Loss of avirulence in the plant pathogen Leptosphaeria maculans by DNA duplication and repeat‐induced point mutation","authors":"Alexander Idnurm, Alec J. McCallum, Angela P. Van de Wouw","doi":"10.1111/ppa.13889","DOIUrl":"https://doi.org/10.1111/ppa.13889","url":null,"abstract":"Microbes can overcome the ability of plant resistance genes to confer protection against disease by mutating their corresponding avirulence genes. The fungus <jats:italic>Leptosphaeria maculans</jats:italic> causes blackleg disease on canola crops and subverts <jats:italic>Brassica napus</jats:italic> resistance genes through several DNA mutation mechanisms. One of these is repeat‐induced point (RIP) mutation, which can ‘leak’ into the avirulence genes from the adjacent repetitive sequences that the mutation process is targeting. Here, we identified populations of <jats:italic>L</jats:italic>. <jats:italic>maculans</jats:italic> in Australia that have extensive RIP mutations in the avirulence gene <jats:italic>AvrLm2</jats:italic> and show that this has been triggered by a duplication of the gene and surrounding DNA that includes the distant (&gt;55 kb in total) <jats:italic>AvrLm6</jats:italic> gene. This finding provides another mechanism of mutation by which pathogens can overcome host resistance, and more broadly contributes to understanding the complex balance between gene duplication and genome defence.","PeriodicalId":20075,"journal":{"name":"Plant Pathology","volume":"2013 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140151906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Inheritance and genetic mapping of the first CPMMV tolerance locus in common bean 蚕豆中第一个 CPMMV 耐受基因座的遗传和基因图谱绘制
IF 2.7 3区 农林科学
Plant Pathology Pub Date : 2024-03-16 DOI: 10.1111/ppa.13892
Rodrigo S. Silva, Josias C. Faria, Rosana P. Vianello, Paula Arielle M. R. Valdisser, Helton S. Pereira, Leonardo C. Melo, Patrícia V. Pinheiro, Thiago Lívio P. O. Souza
{"title":"Inheritance and genetic mapping of the first CPMMV tolerance locus in common bean","authors":"Rodrigo S. Silva, Josias C. Faria, Rosana P. Vianello, Paula Arielle M. R. Valdisser, Helton S. Pereira, Leonardo C. Melo, Patrícia V. Pinheiro, Thiago Lívio P. O. Souza","doi":"10.1111/ppa.13892","DOIUrl":"https://doi.org/10.1111/ppa.13892","url":null,"abstract":"Although cowpea mild mottle virus (CPMMV) has been reported in Brazil since 1983, it has only become a significant concern for researchers and farmers in recent years. The objective of this work was to investigate the genetic basis of CPMMV tolerance, mapping and reporting the first loci associated with this trait in common bean (cv. BRS Sublime). Phenotypic assays were carried out on 180 individual plants (F<jats:sub>2</jats:sub> generation) and 180 F<jats:sub>2:3</jats:sub> progenies comprising 12 plants per family and their parents (BRS Sublime, tolerant parent × CNFCT 16207, susceptible parent). CPMMV was mechanically inoculated and symptoms were evaluated at 35 days after inoculation, using a 1–5 scoring scale. A linkage map was constructed using 1695 single‐nucleotide polymorphism (SNP) and SilicoDArT markers that segregated in the F<jats:sub>2</jats:sub> and F<jats:sub>2:3</jats:sub> generations as expected. Markers were distributed across 11 common bean chromosomes, resulting in a total length of 2864 cM, with an average distance between markers of 1.8 cM. Phenotypic observations revealed that tolerance in cv. BRS Sublime is controlled by a single dominant gene. The main effect quantitative trait locus (QTL; CPMMV.Pv08) associated with CPMMV tolerance was identified in the terminal region on chromosome 8 (Pv08). This QTL explained approximately 77% of phenotypic variation, indicating that the inheritance of tolerance to CPMMV is monogenic, controlled by a major locus. As far as we know, this study represents the first investigation into the inheritance and genetic mapping of CPMMV tolerance in common bean, with potential for the development of elite lines with multiple virus resistance/tolerance.","PeriodicalId":20075,"journal":{"name":"Plant Pathology","volume":"73 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140151904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
All‐in‐one Xylella detection and identification: A nanopore sequencing‐compatible conventional PCR 一体化 Xylella 检测和鉴定:与纳米孔测序兼容的传统 PCR
IF 2.7 3区 农林科学
Plant Pathology Pub Date : 2024-03-16 DOI: 10.1111/ppa.13877
Johanna Wong‐Bajracharya, John Webster, Luciano A. Rigano, Pragya Kant, Anna Englezou, Fridtjof Snijders, Rebecca Roach, Cuiping Wang, Monica Kehoe, Rachel Mann, Fiona E. Constable, Toni A. Chapman
{"title":"All‐in‐one Xylella detection and identification: A nanopore sequencing‐compatible conventional PCR","authors":"Johanna Wong‐Bajracharya, John Webster, Luciano A. Rigano, Pragya Kant, Anna Englezou, Fridtjof Snijders, Rebecca Roach, Cuiping Wang, Monica Kehoe, Rachel Mann, Fiona E. Constable, Toni A. Chapman","doi":"10.1111/ppa.13877","DOIUrl":"https://doi.org/10.1111/ppa.13877","url":null,"abstract":"<jats:italic>Xylella fastidiosa</jats:italic> is a plant‐pathogenic bacterium that poses a serious threat to the production of economically important plant species including grapes, almonds, olives and a broad range of amenity plants, causing significant economic losses worldwide. While multiple molecular detection assays have been developed for <jats:italic>X</jats:italic>. <jats:italic>fastidiosa</jats:italic>, there is a lack of molecular tools available for detection and differentiation of the closely related pear pathogen, <jats:italic>Xylella taiwanensis</jats:italic>. In this study, we present a novel conventional PCR assay with primers that can amplify both <jats:italic>Xylella</jats:italic> species. The amplified product could be sequenced and used for discrimination between the two species and the subspecies within the <jats:italic>fastidiosa</jats:italic> species. This PCR assay was designed using a genome‐informed approach to target the <jats:italic>ComEC/Rec2</jats:italic> gene of both <jats:italic>Xylella</jats:italic> species, ensuring a higher specificity than other previously developed PCR assays. A test performance study across five national plant diagnostic laboratories in Australia and New Zealand demonstrated this assay's high sensitivity and specificity to all known species and subspecies within the <jats:italic>Xylella</jats:italic> genus. This PCR assay can be used for <jats:italic>Xylella</jats:italic> identification at the species and subspecies level and is compatible with Sanger sequencing and nanopore sequencing for rapid turnaround time. The newly developed conventional PCR assay presented here offers rapid detection and accurate identification of both <jats:italic>Xylella</jats:italic> species from plant, insect vector or bacterial samples, enabling timely implementation of biosecurity measures or disease management responses.","PeriodicalId":20075,"journal":{"name":"Plant Pathology","volume":"23 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140151899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimating the frequency of virulence against an Stb gene in Zymoseptoria tritici populations by bulk phenotyping on checkerboard microcanopies of wheat near‐isogenic lines 通过对小麦近等基因系的棋盘格微廓线进行批量表型分析,估算三尖叶蓟马种群中针对Stb基因的毒力频率
IF 2.7 3区 农林科学
Plant Pathology Pub Date : 2024-03-16 DOI: 10.1111/ppa.13894
Frédéric Suffert, Stéphanie Le Prieur, Sandrine Gélisse, Emmie Dzialo, Cyrille Saintenac, Thierry C. Marcel
{"title":"Estimating the frequency of virulence against an Stb gene in Zymoseptoria tritici populations by bulk phenotyping on checkerboard microcanopies of wheat near‐isogenic lines","authors":"Frédéric Suffert, Stéphanie Le Prieur, Sandrine Gélisse, Emmie Dzialo, Cyrille Saintenac, Thierry C. Marcel","doi":"10.1111/ppa.13894","DOIUrl":"https://doi.org/10.1111/ppa.13894","url":null,"abstract":"Monitoring virulent strains within pathogen populations is crucial to improve host resistance deployment strategies. Such monitoring increasingly involves field pathogenomics studies of molecular polymorphisms in pathogen genomes based on high‐throughput screening technologies. However, it is not always straightforward to predict virulence phenotypes from these polymorphisms, and in planta phenotyping remains necessary. We developed a method for ‘bulk phenotyping on checkerboard microcanopies of wheat near‐isogenic lines’ (BPC) for estimating the frequency of virulence against a resistance gene in mixed populations of the fungal pathogen <jats:italic>Zymoseptoria tritici</jats:italic>, the causal agent of Septoria tritici blotch (STB) in wheat, without the need for strain‐by‐strain pathogen phenotyping. Our method involves the uniform inoculation of a microcanopy of two wheat lines—one with the target resistance gene and the other without it—with a multistrain mixture of isolates representative of the population to be characterized, followed by the differential quantification of infection points (lesions). Using <jats:italic>Stb16q</jats:italic>, a wheat resistance gene that has recently broken down in Europe, we found a robust correlation between the ratio of the mean number of lesions on each wheat line and the frequency of virulent strains in the inoculum. Using pairs of virulent and avirulent strains, as well as synthetic populations consisting of 10 virulent strains and 10 avirulent strains mixed in different proportions, we validated the principle of the method and established standard curves at virulence frequencies close to those observed in natural conditions. We discuss the potential of this method for virulence monitoring in combination with molecular methods.","PeriodicalId":20075,"journal":{"name":"Plant Pathology","volume":"1 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140151903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Landscape‐scale patterns and predictors of potato viruses in Scotland 苏格兰马铃薯病毒的景观尺度模式和预测因素
IF 2.7 3区 农林科学
Plant Pathology Pub Date : 2024-03-16 DOI: 10.1111/ppa.13891
Peter Skelsey
{"title":"Landscape‐scale patterns and predictors of potato viruses in Scotland","authors":"Peter Skelsey","doi":"10.1111/ppa.13891","DOIUrl":"https://doi.org/10.1111/ppa.13891","url":null,"abstract":"Virus diseases represent important economic threats to seed potato production worldwide, yet relatively little is known of their epidemiology at the landscape‐scale. In this study, data was compiled from the Scottish national seed potato classification scheme on the incidence of 10 different potato viruses for the years 2009–2022. A co‐occurrence analysis identified that 12 virus species pairs occurred together more often than expected by chance, and potato blackleg was positively associated with eight potato viruses. ArcGIS was used to investigate spatial and spatiotemporal variation in incidence rates of the three most prevalent viruses (potato virus Y, potato leaf roll virus and potato virus A), and this revealed prominent geographic differences in long‐term disease outcomes. Focusing on potato virus Y as the most commonly occurring single infection, interpretable machine‐learning techniques were used to investigate the influence of key crop, management and environmental factors on patterns of incidence in space and time. The results showed that health characteristics of seed stocks were among the most important predictors of incidence, along with blackleg infection, several management features, cultivar resistance, distance to the nearest seed and ware crop, temperature variables and several soil features. This approach provides a comprehensive overview of potato viruses in Scotland, a deeper understanding of epidemiological risk factors at the landscape‐scale and a forecast model that could serve as the basis of a decision support tool for improved management of potato virus Y.","PeriodicalId":20075,"journal":{"name":"Plant Pathology","volume":"499 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140151978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Selective autophagy receptor‐encoding sequences in shallot transcriptome: In silico identification and expression patterns in response to asymptomatic shallot virus X infection 香葱转录组中的选择性自噬受体编码序列:无症状大葱病毒 X 感染的硅学鉴定和表达模式
IF 2.7 3区 农林科学
Plant Pathology Pub Date : 2024-03-06 DOI: 10.1111/ppa.13887
Valeriy K. Vishnichenko
{"title":"Selective autophagy receptor‐encoding sequences in shallot transcriptome: In silico identification and expression patterns in response to asymptomatic shallot virus X infection","authors":"Valeriy K. Vishnichenko","doi":"10.1111/ppa.13887","DOIUrl":"https://doi.org/10.1111/ppa.13887","url":null,"abstract":"Plant host tolerance is a key plant defence response to parasites, including viruses. This complex genetic trait involves multiple molecular mechanisms and, in particular, selective autophagy. Experimental data on the role of various selective autophagy factors and, in particular, cargo receptors in plant tolerance to viral infection are extremely limited. In this communication, I present the results of in silico identification of sequences in the shallot transcriptome encoding homologues of several selective autophagy receptors (SARs) related to the immune response and their expression patterns in response to asymptomatic infection of shallot virus X, a member of the genus <jats:italic>Allexivirus</jats:italic>, subgenus <jats:italic>Acarallexivirus</jats:italic>, within the family <jats:italic>Alphaflexiviridae</jats:italic>. The results obtained, together with the relevant literature data, suggest that some SARs likely to be involved in the regulation of the unfolded protein response and programmed cell death may play an active role in the formation of the state of tolerance of the host plant to allexivirus infection.","PeriodicalId":20075,"journal":{"name":"Plant Pathology","volume":"33 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140053969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信