Zohreh Borjizad, Mehdi Mehrabi-Koushki, Reza Farokhinejad, Atena Safi, Man Mu, Marco Thines
{"title":"A new species of Bremia from the traditional crop Carthamus tinctorius from Iran","authors":"Zohreh Borjizad, Mehdi Mehrabi-Koushki, Reza Farokhinejad, Atena Safi, Man Mu, Marco Thines","doi":"10.1007/s40858-024-00640-w","DOIUrl":null,"url":null,"abstract":"<p><i>Bremia</i> species cause downy mildew disease of Asteraceae, in particular in the subfamilies Cichorioideae and Carduoideae. The most notorious species is <i> B. lactucae</i>, which causes lettuce downy mildew. Previously, it was often assumed that this species causes disease on dozens of different host genera, but recent phylogenetic and morphological studies have shown that most species of <i>Bremia</i> are highly host specific and that <i> B. lactucae</i> might be mostly limited to <i>Lactuca sativa</i> and <i> L. serriola</i>. As a first step towards investigating the diversity of <i>Bremia</i> in Iran, ten fresh samples of downy mildew from <i>Carthamus tinctorius</i> and <i>Sonchus asper</i> were collected in 2017 to 2018 from various regions of Ahvaz in the southwest of Iran and subjected to morphological and molecular characterisation. Phylogenetic analyses based on <i>cox</i>2 sequences of mtDNA indicated that these samples represent two sister species of <i>Bremia</i>, <i>B. milovtzovae</i> sp. nov. and <i>B</i>. <i>sonchi</i>, causal agents of downy mildew on <i>C. tinctorius</i> and <i>S. asper</i>, respectively. Morphologically, <i>B. milovtzovae</i> sp. nov. can be readily distinguished from its sister species, <i>B. sonchi</i>, by more elongated conidia and shorter conidiophores.</p>","PeriodicalId":23354,"journal":{"name":"Tropical Plant Pathology","volume":null,"pages":null},"PeriodicalIF":2.5000,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Tropical Plant Pathology","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1007/s40858-024-00640-w","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Agricultural and Biological Sciences","Score":null,"Total":0}
引用次数: 0
Abstract
Bremia species cause downy mildew disease of Asteraceae, in particular in the subfamilies Cichorioideae and Carduoideae. The most notorious species is B. lactucae, which causes lettuce downy mildew. Previously, it was often assumed that this species causes disease on dozens of different host genera, but recent phylogenetic and morphological studies have shown that most species of Bremia are highly host specific and that B. lactucae might be mostly limited to Lactuca sativa and L. serriola. As a first step towards investigating the diversity of Bremia in Iran, ten fresh samples of downy mildew from Carthamus tinctorius and Sonchus asper were collected in 2017 to 2018 from various regions of Ahvaz in the southwest of Iran and subjected to morphological and molecular characterisation. Phylogenetic analyses based on cox2 sequences of mtDNA indicated that these samples represent two sister species of Bremia, B. milovtzovae sp. nov. and B. sonchi, causal agents of downy mildew on C. tinctorius and S. asper, respectively. Morphologically, B. milovtzovae sp. nov. can be readily distinguished from its sister species, B. sonchi, by more elongated conidia and shorter conidiophores.
期刊介绍:
Tropical Plant Pathology is an international journal devoted to publishing a wide range of research on fundamental and applied aspects of plant diseases of concern to agricultural, forest and ornamental crops from tropical and subtropical environments.
Submissions must report original research that provides new insights into the etiology and epidemiology of plant disease as well as population biology of plant pathogens, host-pathogen interactions, physiological and molecular plant pathology, and strategies to promote crop protection.
The journal considers for publication: original articles, short communications, reviews and letters to the editor. For more details please check the submission guidelines.
Founded in 1976, the journal is the official publication of the Brazilian Phytopathology Society.