Canadian Journal of Plant Pathology最新文献_第6页

Occurrence of Erysiphe friesii var. dahurica on purple buckthorn (Rhamnus purpurea) from Pakistan 白芷在巴基斯坦紫沙棘上的发生

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-05-17 DOI: 10.1080/07060661.2023.2215208

N. Afshan, Saliha Afzal, M. Riaz, Arooma Saleem, A. R. Niazi, A. Khalid

引用次数: 0

Ampelomyces mycoparasites of powdery mildews – a review 白粉病的曲霉分枝寄生虫研究进展

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-05-11 DOI: 10.1080/07060661.2023.2206378

Rosa E. Prahl, Shahjahan Khan, R. Deo

{"title":"Ampelomyces mycoparasites of powdery mildews – a review","authors":"Rosa E. Prahl, Shahjahan Khan, R. Deo","doi":"10.1080/07060661.2023.2206378","DOIUrl":"https://doi.org/10.1080/07060661.2023.2206378","url":null,"abstract":"Abstract This review paper highlights the significant research conducted on fungi belonging to the genus Ampelomyces. Phylogeny based on both ITS and actin sequences has grouped Ampelomyces into different lineages. However, the ITS2 spacer, one constituent of the ITS region, together with their secondary structures (S2s), showed that these lineages are represented by different S2s; also, evidence of pseudogene formation in nuclear ribosomal genes of two isolates was reported, and S2s in Ampelomyces mycoparasites are different from those in Phoma-like fungi. Ampelomyces taxonomy is unresolved and future multi-locus analysis will assist in delimiting species. Members of the genus Ampelomyces are among the first mycoparasites used to control powdery mildew fungi as they can efficiently eliminate mycelial growth and reduce the overwintering inoculum of their mycohosts. In addition, Ampelomyces isolates were found to be resistant to some fungicides and insecticides, e.g. pyrazophos, an attractive feature for their selection as biocontrol agents. Transcriptome analyses have revealed that expression of the genes that encode proteins putatively associated with virulence and plant immune responses were enhanced during host recognition, while genes-encoding proteins linked to antibiotic resistance were predicted within the Ampelomyces genome. Proteomic studies are needed to confirm whether these proteins function in virulence and can therefore be used for biocontrol purposes or as bacterial antibiotic-resistant proteins, and which of these may trigger plant immune responses to facilitate plant protection. We encourage the continuation of these studies to benefit crop protection research.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"45 1","pages":"391 - 404"},"PeriodicalIF":2.0,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46794739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

Characterization of Plasmodiophora brassicae pathotypes from western Canada in 2019-2020 2019-2020年加拿大西部地区芸苔菌病型分析

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-05-10 DOI: 10.1080/07060661.2023.2212639

K. Hollman, V. Manolii, Y. Aigu, M. Harding, S. Hwang, S. Strelkov

{"title":"Characterization of Plasmodiophora brassicae pathotypes from western Canada in 2019-2020","authors":"K. Hollman, V. Manolii, Y. Aigu, M. Harding, S. Hwang, S. Strelkov","doi":"10.1080/07060661.2023.2212639","DOIUrl":"https://doi.org/10.1080/07060661.2023.2212639","url":null,"abstract":"Abstract Clubroot, caused by Plasmodiophora brassicae, is a major soilborne disease of canola (Brassica napus) on the Canadian Prairies. Most canola cultivars carry what is now referred to as ‘first-generation’ resistance, which represents the most widely used clubroot management tool. Unfortunately, new pathotypes of P. brassicae have emerged that can overcome this resistance. By 2018, 36 unique pathotypes of P. brassicae had been identified on the Prairies based on their virulence on the Canadian Clubroot Differential (CCD) set, with pathotypes 3A, 3D and 3 H being predominant. Since the virulence of P. brassicae populations can shift rapidly in response to host selection pressure, continued pathotype monitoring is important for resistance stewardship. Clubbed roots were collected from 133 canola crops (126 in Alberta, 6 in Saskatchewan, 1 in Manitoba) in 2019 and 127 crops (113 in Alberta, 13 in Saskatchewan, 1 in Manitoba) in 2020, and evaluated for their CCD pathotype designations. Twenty-five unique pathotypes were identified across the sampled crops over the two years of the study; these included seven novel pathotypes, six of which could overcome first-generation resistance (3C, 8 G, 8I, 9D, 9E and 9F). While pathotypes 3A, 3D and 3 H continued to be identified frequently in 2019 and 2020, several others, most notably pathotype 8E (virulent on hosts with first-generation resistance), had also become more common by 2020. The results indicate the continued emergence of new P. brassicae pathotypes on canola.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49131980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Alberta regional meeting, 2022 / Réunion régionale de l’Alberta, 2022 2022年艾伯塔省地区会议/2022年阿尔伯塔省地区联盟

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-05-04 DOI: 10.1080/07060661.2023.2195251

R. Aboukhaddour, P. Lokuruge, A. Mulenga, G. Peng, W. May, R. Mohr, G. Telmosse, D. Pageau, A. Foster, B. Blackwell, H. Kubota

{"title":"Alberta regional meeting, 2022 / Réunion régionale de l’Alberta, 2022","authors":"R. Aboukhaddour, P. Lokuruge, A. Mulenga, G. Peng, W. May, R. Mohr, G. Telmosse, D. Pageau, A. Foster, B. Blackwell, H. Kubota","doi":"10.1080/07060661.2023.2195251","DOIUrl":"https://doi.org/10.1080/07060661.2023.2195251","url":null,"abstract":"Pyrenophora tritici-repentis (tan spot) is a complex foliar pathogen that primarily infects hexaploid (bread) and tetraploid (durum) wheat, as well as a variety of wild grass species. Eight races of P. tritici-repentis have been described worldwide, based on their virulence patterns on a host differential set. The virulence of these races reflects their capacity to produce three known necrotrophic effectors (NE), either alone or in various combinations. Recently, ‘atypical’ isolates of P. tritici-repentis , which induce the necrosis typical of some of these races but lack the corresponding NE, were identified from durum wheat in North Africa (Tunisia), a secondary centre of diversity of this crop. The aim of this study was to char-acterize additional collections of P. tritici-repentis from Tunisia, in order to determine their virulence profiles and assist in the identification of novel races and NEs. Preliminary characterization of 53 isolates on the standard differential set indicated that 16.6% were classified as races 3 and 8, while 50% were race 5. In addition, 16.6% of the isolates appeared to induce atypical responses, meaning that the host response to inoculation did not seem to fit the standard reactions to the eight known races. Additional testing is underway to confirm these reactions, and all isolates will be assessed for the presence or absence of the known NE-encoding genes. An improved knowledge of the virulence of P. tritici-repentis , including the occurrence of novel races and NEs, will be important for the sustainable management","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"45 1","pages":"197 - 206"},"PeriodicalIF":2.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45920052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Annual meeting, the Canadian phytopathological society, 2022/Réunion annuelle, la société canadienne de phytopathologie, 2022 年会，加拿大植物病理学会，2022年

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-05-04 DOI: 10.1080/07060661.2023.2202486

G., J., Bilodeau, C. Beaulieu

{"title":"Annual meeting, the Canadian phytopathological society, 2022/Réunion annuelle, la société canadienne de phytopathologie, 2022","authors":"G., J., Bilodeau, C. Beaulieu","doi":"10.1080/07060661.2023.2202486","DOIUrl":"https://doi.org/10.1080/07060661.2023.2202486","url":null,"abstract":"Emerging outbreaks of plant diseases pose enormous threat to agricultural production and global food security. Early detection and identification of plant pathogens using next-generation sequencing (NGS) technology and bioinformatics analysis are important to cope with the increase of international trade. Here, we present the PolyChrome bioinformatics toolkit for the detection and identification of regulated plant diseases. The PolyChrome toolkit con-sists of two programs, PolyChrome Detector (PCD) and PolyChrome Classifier (PCC). The former detects the presence of specific species from metagenomic and meta-transcriptomic data and the latter focus on the classification of closely related microorganisms at species or sub-species levels. In the PCD workflow, adapters and low-quality reads of raw NGS sequences are removed using Atria, an in-house designed trimming program. Clean reads are mapped to individual genomes, and then assembled to larger contigs, which are aligned to databases with taxonomy assignment. At the end of the pipeline, the annotated contigs are filtered with statistics on identity, alignment lengths, and bit scores, and suspected contigs of pathogens are reported. In PCC platform analysis, we first built curated PCC databases of selected regulated agents, e.g. Clavibacter, Liberibacter, Dickeya and Pectobacter , containing the genome sequences, anno-tations and the pre-analysis results, including average nucleotide identity (ANI) values. Testing dataset goes through the similar pipeline as PCD for contig generation and are classified using ANI values. The PolyChrome with PCD and PCC pipelines have been used to detect and identify plant pathogens, and has great potential in the detection of potato wart pathogen in soil.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"45 1","pages":"210 - 235"},"PeriodicalIF":2.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47953057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Saskatchewan regional meeting, 2022 / Réunion régionale de la Saskatchewan, 2022 萨斯喀彻温省区域会议，2022年

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-05-04 DOI: 10.1080/07060661.2023.2195254

引用次数: 0

Isolation, identification, and host range of Aspergillus welwitschiae causing postharvest rot on Chinese cabbage in China 引起我国大白菜采后腐烂病的沃氏曲霉菌的分离鉴定及寄主范围

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-04-27 DOI: 10.1080/07060661.2023.2208088

Jiaxi Li, An Zhang, Yan Liu, Yaowei Zhang, Ran Gu

{"title":"Isolation, identification, and host range of Aspergillus welwitschiae causing postharvest rot on Chinese cabbage in China","authors":"Jiaxi Li, An Zhang, Yan Liu, Yaowei Zhang, Ran Gu","doi":"10.1080/07060661.2023.2208088","DOIUrl":"https://doi.org/10.1080/07060661.2023.2208088","url":null,"abstract":"Abstract A new kind of postharvest rot on Chinese cabbage (Brassica rapa L. ssp. pekinensis) caused by a fungus was observed in vegetable cellars in Harbin, China in 2019 and 2020, causing considerable economic losses. A water-soaked spot appeared at the base of the midrib of leaves, extended into the upper part of the midrib, and ultimately turned into rot. The diseased part was dark brown or black with a few black spores on the surface. Fungal isolates were obtained from the diseased plants and identified as Aspergillus welwitschiae through morphological observation and multigene sequencing analysis of the internal transcribed spacer, β-tubulin and calmodulin genetic regions. Pathogenicity tests were conducted, and the resulting symptoms on Chinese cabbage were similar to those seen in the vegetable cellar. The isolates were also associated with rot and leaf spot on seedlings and affected the seed germination of Chinese cabbage. A host range test showed that the isolates could infect some common vegetables, including carrot, kidney bean, broccoli, radish, Chinese flowering cabbage, root-mustard, cabbage, non-heading Chinese cabbage, pepper, lettuce, oilseed rape, tomato and cucumber. The isolation, identification, and host range of the pathogen can provide a basis for the study of the occurrence, prevention and management of the disease in the future.","PeriodicalId":9468,"journal":{"name":"Canadian Journal of Plant Pathology","volume":"45 1","pages":"351 - 359"},"PeriodicalIF":2.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48369924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

In memoriam / En mémoire: Dr. Susan M. Boyetchko January 4, 1959–February 8, 2023 纪念：Susan M.Boyetchko博士1959年1月4日至2023年2月8日

IF 2 4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-04-25 DOI: 10.1080/07060661.2023.2202481

引用次数: 0

Southwestern Ontario regional meeting, 2022 / Réunion régionale du-oust de l’Ontario, 2022 2022年西南安大略区域会议/ 2022年安大略西部区域会议

4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-04-25 DOI: 10.1080/07060661.2023.2202488

引用次数: 0

New records of parasitic fungi on Cassia fistula and Leucaena leucocephala (Fabaceae) in Colombia 哥伦比亚决明子和银合欢寄生真菌新记录

4区农林科学

Canadian Journal of Plant Pathology Pub Date : 2023-04-12 DOI: 10.1080/07060661.2023.2195843

Samir Galvis-López, Mauricio Salazar-Yepes, Juan Morales-Osorio

引用次数: 0