{"title":"<i>Rhexocercosporidium matricariae</i> sp. nov.: A New Pathogen on the Medicinal Plant <i>Matricaria recutita</i>.","authors":"Monika Götz, Katja Sommerfeld, Ute Gärber, Uwe Braun, Samad Ashrafi","doi":"10.1094/PDIS-01-24-0085-SR","DOIUrl":null,"url":null,"abstract":"<p><p>A new disease was observed on chamomile plants (<i>Matricaria recutita</i>) in various commercially cultivated fields in 2016 and 2017 in Germany. From symptomatic stems and leaves, the fungal species described here was isolated repeatedly. Koch's postulates using in planta experiments were fulfilled by inoculation of chamomile plants proving the fungus to be the causal agent of the disease. Morphological studies and phylogenetic analyses using internal transcribed spacer, large subunit, and translation elongation factor-1α sequences suggested that the fungus represents a new species within the genus <i>Rhexocercosporidium</i> (Helotiales). The data are presented together with a description of the growth parameters and comprehensive illustrations of the new species, <i>Rhexocercosporidium matricariae</i>. All species so far assigned to <i>Rhexocercosporidium</i> are compared and discussed. The combination <i>Rhexocercosporidium microsporum</i> is validated.</p>","PeriodicalId":20063,"journal":{"name":"Plant disease","volume":" ","pages":"2645-2652"},"PeriodicalIF":4.4000,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plant disease","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1094/PDIS-01-24-0085-SR","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/9/11 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
A new disease was observed on chamomile plants (Matricaria recutita) in various commercially cultivated fields in 2016 and 2017 in Germany. From symptomatic stems and leaves, the fungal species described here was isolated repeatedly. Koch's postulates using in planta experiments were fulfilled by inoculation of chamomile plants proving the fungus to be the causal agent of the disease. Morphological studies and phylogenetic analyses using internal transcribed spacer, large subunit, and translation elongation factor-1α sequences suggested that the fungus represents a new species within the genus Rhexocercosporidium (Helotiales). The data are presented together with a description of the growth parameters and comprehensive illustrations of the new species, Rhexocercosporidium matricariae. All species so far assigned to Rhexocercosporidium are compared and discussed. The combination Rhexocercosporidium microsporum is validated.
期刊介绍：
Plant Disease is the leading international journal for rapid reporting of research on new, emerging, and established plant diseases. The journal publishes papers that describe basic and applied research focusing on practical aspects of disease diagnosis, development, and management.
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