MycologiaPub Date : 2024-11-01Epub Date: 2024-10-31DOI: 10.1080/00275514.2024.2407755
Alassane Sow, Benjamin Lemmond, Bryan Rennick, Judson Van Wyk, Lois Martin, Margaret Townsend, Arthur Grupe, Randolph Beaudry, Rosanne Healy, Matthew E Smith, Gregory Bonito
{"title":"<i>Tuber cumberlandense and T. canirevelatum</i>, two new edible <i>Tuber</i> species from eastern North America discovered by truffle-hunting dogs.","authors":"Alassane Sow, Benjamin Lemmond, Bryan Rennick, Judson Van Wyk, Lois Martin, Margaret Townsend, Arthur Grupe, Randolph Beaudry, Rosanne Healy, Matthew E Smith, Gregory Bonito","doi":"10.1080/00275514.2024.2407755","DOIUrl":"10.1080/00275514.2024.2407755","url":null,"abstract":"<p><p>Ectomycorrhizal fungi in the genus <i>Tuber</i> form hypogeous fruiting bodies called truffles. Many <i>Tuber</i> species are highly prized due to their edible and aromatic ascomata. Historically, there has been attention on cultivating and selling European truffle species, but there is growing interest in cultivating, wild-harvesting, and selling species of truffles endemic to North America. North America has many endemic <i>Tuber</i> species that remain undescribed, including some that have favorable culinary qualities. Here, we describe two such <i>Tuber</i> species from eastern North America. Maximum likelihood and Bayesian phylogenetic analyses of ITS (internal transcribed spacer), <i>tef1</i> (translation elongation factor 1-alpha), and <i>rpb2</i> (second largest subunit of RNA polymerase II) sequences were used to place these species within a phylogenetic context. We coupled these data with morphological analyses and volatile analyses based on gas chromatography-mass spectrometry. <i>Tuber cumberlandense</i>, sp. nov. (previously referred to as <i>Tuber</i> sp. 66), is a member of the Rufum clade that has been opportunistically harvested for commercial sale from <i>T. melanosporum</i> orchards across eastern North America. <i>Tuber canirevelatum</i>, sp. nov. belongs in the Macrosporum clade and thus far is only known from eastern Tennessee, USA. Both new species were discovered with the assistance of trained truffle dogs. The volatile profiles of <i>T. canirevelatum</i> and <i>T. cumberlandense</i> were measured in order to characterize aromas based on the chemical compounds produced by these fungi. Ascomata from both species were enriched in acetone, dimethyl sulfide, 1-(methylthio)-1-propene, and 1-(methylthio)propane. In this work, we celebrate and encourage the use of trained truffle-hunting dogs for fungal biodiversity discovery and research.</p>","PeriodicalId":18779,"journal":{"name":"Mycologia","volume":" ","pages":"949-964"},"PeriodicalIF":2.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142558273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MycologiaPub Date : 2024-11-01Epub Date: 2024-10-18DOI: 10.1080/00275514.2024.2397932
Melissa Cravero, Gregory Bonito, Patrick S Chain, Saskia Bindschedler, Pilar Junier
{"title":"A new species of true morel from Switzerland: <i>Morchella helvetica</i>, sp. nov.","authors":"Melissa Cravero, Gregory Bonito, Patrick S Chain, Saskia Bindschedler, Pilar Junier","doi":"10.1080/00275514.2024.2397932","DOIUrl":"10.1080/00275514.2024.2397932","url":null,"abstract":"<p><p><i>Morchella helvetica</i>, sp. nov. (<i>Morchella</i> sect. <i>Distantes</i>) is a new species of true morels discovered in Switzerland. It is formally described in the present study using an integrative approach based on micro- and macromorphological characteristics, multilocus phylogenetics, and a brief description of its habitat. Molecular analyses clearly indicated that <i>Morchella helvetica</i> is a sister species to <i>M. eximioides, M. angusticeps</i>, and <i>M. confusa</i>. It can be distinguished by the two phylogenetic markers RNA polymerase II subunit 2 (<i>RPB2</i>) and translation elongation factor-1 alpha <i>(TEF1-α</i>). In addition, <i>M. helvetica</i> exhibits particular morphological features, notably the presence of pale hairs on the pileus, a mealy stipe, and darkening ridges when aging.</p>","PeriodicalId":18779,"journal":{"name":"Mycologia","volume":" ","pages":"1101-1109"},"PeriodicalIF":2.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MycologiaPub Date : 2024-11-01Epub Date: 2024-08-19DOI: 10.1080/00275514.2024.2370198
Donald H Pfister, Katherine F LoBuglio, Michael Bradshaw, Renée Lebeuf, Andrus Voitk
{"title":"<i>Peziza nivalis</i> and relatives-spring fungi of wide distribution.","authors":"Donald H Pfister, Katherine F LoBuglio, Michael Bradshaw, Renée Lebeuf, Andrus Voitk","doi":"10.1080/00275514.2024.2370198","DOIUrl":"10.1080/00275514.2024.2370198","url":null,"abstract":"<p><p>Several members of the genus <i>Peziza</i> sensu stricto occur at the edge of melting snow. These nivicolous species have been widely reported in the Northern Hemisphere and are also known from Australia and New Zealand. We have used 16 specimens from North America and Australia to study morphology and to perform DNA sequencing. In sequence analyses, we have used ITS1 and ITS2 (internal transcribed spacers), 28S, <i>RPB2</i> (RNA polymerase II gene), and two genes new to these studies, <i>GAPDH</i> (glyceraldehyde-3-phosphate dehydrogenase) and <i>HSP90</i> (heat shock protein 90). Although not all regions are available for all samples, we have recognized the following species: <i>Peziza heimii, P. nivalis</i>, and <i>P. nivis</i>. Phylogenetic analyses were done using ITS alone; combined ITS1-5.8S-ITS2, 28S, and <i>RPB2</i>; ITS, and 28S, <i>RPB2, GAPDH</i>, and <i>HSP90</i>. Even with this augmented set of genes and despite their widespread occurrence in North America, Europe, Australia, and New Zealand, we have not definitively distinguished species within this group. To assess these results, pairwise homoplasy index (PHI) analysis was employed. This showed evidence of recombination among the samples of <i>P. nivalis</i> and further supports the view of <i>P. nivalis</i> as a monophyletic cosmopolitan species. As part of this study, we also examined the variation in ITS copies in <i>P. echinospora</i>, for which a genome is available.</p>","PeriodicalId":18779,"journal":{"name":"Mycologia","volume":" ","pages":"1019-1032"},"PeriodicalIF":2.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142004814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MycologiaPub Date : 2024-11-01Epub Date: 2024-10-07DOI: 10.1080/00275514.2024.2395697
R Berndt, M A G Otálora, M Angulo, J C Zamora
{"title":"First European records of <i>Puccinia modiolae</i> and <i>P. platyspora</i>, two native South American rust fungi, and new observations on their life cycle and morphology.","authors":"R Berndt, M A G Otálora, M Angulo, J C Zamora","doi":"10.1080/00275514.2024.2395697","DOIUrl":"10.1080/00275514.2024.2395697","url":null,"abstract":"<p><p>This paper reports the South American rust fungi <i>Puccinia modiolae</i> and <i>P. platyspora</i> (Pucciniales/Uredinales) as new alien species of the European rust funga. <i>Puccinia modiolae</i> is presently known from Switzerland and Germany, <i>P. platyspora</i> from Switzerland, Germany, and France. The records of <i>P. platyspora</i> are the first ones from outside South America. The specimens were identified by teliospore characters and sequences of the nuclear ribosomal DNA (internal transcribed spacer 2 and domains D1-D2 of the nuclear ribosomal large subunit) and the mitochondrial <i>CO3</i> (cytochrome <i>c</i> oxidase III) gene. <i>Puccinia modiolae</i> and <i>P. platyspora</i> have been recorded so far in Europe on members of the genera <i>Alcea</i>, predominantly on <i>Alcea rosea, Althaea</i>, and <i>Malva</i> of the Malvaceae, subfam. Malvoideae. <i>Alcea rosea</i> is host of both species and shared also with the common mallow rust, <i>P. malvacearum</i>, allowing for mixed infections. The plant is commonly grown as an ornamental and may play a major role for the spread of the alien Malvaceae rust fungi. It was observed for the first time that <i>P. platyspora</i> can produce spermogonia and aecidium-type aecia, suggesting phenotypic plasticity regarding the formation of spore states. The observed spermogonia mainly remained closed and did not liberate spermatia. They produced telio- and aeciospores besides spermatia in their cavity and eventually converted entirely into telia or, rarely, into aecidium-like sori. Small clusters of aeciospores and peridial cells were commonly found hidden in the telial plectenchyma, and well-developed aecidium-type aecia provided with a peridium developed rarely in the center of mature telia. Spermogonia belonging to group V type 4 were found in <i>P. malvacearum</i>, which is generally supposed to lack spermogonia. Some spermogonia produced only spermatia in their cavity; others formed spermatia and teliospores, and some eventually converted into telia.</p>","PeriodicalId":18779,"journal":{"name":"Mycologia","volume":" ","pages":"915-935"},"PeriodicalIF":2.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142391851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MycologiaPub Date : 2024-11-01Epub Date: 2024-08-29DOI: 10.1080/00275514.2024.2363211
James K Douch, Luke J Vaughan, Jerry A Cooper, Gareth D Holmes, Richard Robinson, Franck Stefani, Alexander Idnurm, Tom W May
{"title":"Taxonomic revision of fleshy species of <i>Hydnellum, Neosarcodon</i>, and <i>Sarcodon</i> (Thelephorales) from Australasia.","authors":"James K Douch, Luke J Vaughan, Jerry A Cooper, Gareth D Holmes, Richard Robinson, Franck Stefani, Alexander Idnurm, Tom W May","doi":"10.1080/00275514.2024.2363211","DOIUrl":"10.1080/00275514.2024.2363211","url":null,"abstract":"<p><p>Stipitate Thelephorales are basidiomycetous, mostly hydnoid, ectomycorrhizal fungi. Some species have declined considerably, and some are threat-listed as vulnerable or endangered. These ecological concerns require a well-resolved taxonomy to understand diversity in this group of fungi and facilitate conservation. However, phylogenetic studies have mostly neglected Southern Hemisphere representatives. This study examines the fleshy species of stipitate Thelephorales from native forests in Australia and New Zealand, using morphological analyses and phylogenetic analyses of nuc rDNA internal transcribed spacer region ITS1-5.8S-ITS2 (ITS barcode) and D1-D2 domains at the 5' end of nuc 28S rDNA (28S) sequences amplified from DNA isolated from fungarium collections and environmental DNA (eDNA) sequences from the Australian Microbiome initiative. Five new species, <i>Sarcodon austrofibulatus, Hydnellum gatesiae, H. nothofagacearum, H. pseudoioeides</i>, and <i>H. variisporum</i>, are described, <i>Sarcodon carbonarius</i> is transferred to <i>Neosarcodon</i>, and a key is provided for the six named species in the region. <i>Boletopsis</i> and <i>Neosarcodon</i> are reported from Australia for the first time based on detections from eDNA in soil samples taken from native forests. The Australasian species of <i>Hydnellum</i> occupy a highly derived position with the phylogeny of the genus, the members of which are otherwise all from the Northern Hemisphere, suggestive of a long-distance dispersal origin for the Australasian species.</p>","PeriodicalId":18779,"journal":{"name":"Mycologia","volume":" ","pages":"965-992"},"PeriodicalIF":2.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142109599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MycologiaPub Date : 2024-11-01Epub Date: 2024-10-18DOI: 10.1080/00275514.2024.2395688
Jean-Claude Rizinde Hakizimana, Mario Amalfi, Alphonse Balezi, Cony Decock
{"title":"<i>Laetiporus</i> (Laetiporaceae, Basidiomycota) in tropical Africa is represented by a single Afromontane lineage and four species, including <i>Laetiporus discolor, Laetiporus oboensis</i>, sp. nov., <i>Laetiporus tenuiculus</i>, sp. nov., and <i>Laetiporus</i> sp. 1.","authors":"Jean-Claude Rizinde Hakizimana, Mario Amalfi, Alphonse Balezi, Cony Decock","doi":"10.1080/00275514.2024.2395688","DOIUrl":"10.1080/00275514.2024.2395688","url":null,"abstract":"<p><p>The tropical African <i>Laetiporus</i> species are revised, based on morphological, ecological, distribution, and phylogenetic data. <i>Laetiporus discolor</i>, originally described from insular Mauritius, is accepted for the species spanning over the African eastern mountain ranges. <i>Laetiporus oboensis</i> and <i>Laetiporus tenuiculus</i> are described as new from the African equatorial insular São Tomé, based on phylogenetic, morphological, and distribution data. <i>Laetiporus oboensis</i> is characterized by compound basidiomes, with densely imbricated pilei in pale orange tint, a lobed margin, 3-4 pores/mm, and basidiospores averaging 4.8 × 3.7 μm. <i>Laetiporus tenuiculus</i> has mostly solitary, small, thin basidiomes, with pale flesh to pale orange pileus, an incised margin, 4-5 pores/mm, and basidiospores averaging 5.4 × 4.2 µm. A fourth species, known from two isolates from Ethiopian highlands, but for which voucher specimens were not available for description, is uncertain. These four species form an African endemic lineage, whose distribution is Afromountainous.</p>","PeriodicalId":18779,"journal":{"name":"Mycologia","volume":" ","pages":"1083-1100"},"PeriodicalIF":2.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MycologiaPub Date : 2024-11-01Epub Date: 2024-09-26DOI: 10.1080/00275514.2024.2394758
Wilma J Nel, Claire Randolph, Trudy Paap, Brett P Hurley, Bernard Slippers, Irene Barnes, Michael J Wingfield
{"title":"<i>Fusarium</i> species associated with <i>Euwallacea xanthopus</i> in South Africa, including two novel species.","authors":"Wilma J Nel, Claire Randolph, Trudy Paap, Brett P Hurley, Bernard Slippers, Irene Barnes, Michael J Wingfield","doi":"10.1080/00275514.2024.2394758","DOIUrl":"10.1080/00275514.2024.2394758","url":null,"abstract":"<p><p>Ambrosia beetles (Coleoptera: Curculionidae: Scolytinae) are small wood-boring insects that live in an obligate symbiosis with fungi, which serve as their primary food source. Beetles residing in the genus <i>Euwallacea</i> have evolved a unique association with a clade of <i>Fusarium</i> that falls within the aptly named Ambrosia <i>Fusarium</i> Clade (AFC). The discovery of the invasive polyphagous shot hole borer, <i>E. fornicatus</i>, in South Africa, has heightened awareness of ambrosia beetles and their symbionts in the country. In this study, we investigated the <i>Fusarium</i> symbionts of three species of <i>Euwallacea</i> in South Africa, with a specific focus on those associated with <i>E. xanthopus</i>. Isolations of <i>Fusarium</i> strains from both living and dissected beetles yielded nearly 100 isolates. Using multigene phylogenetic analyses, these isolates were identified as six different <i>Fusarium</i> species. <i>Fusarium hypothenemi</i> and <i>F. euwallaceae</i> have previously been reported from South Africa. <i>Fusarium pseudensiforme</i> and <i>Fusarium</i> AF-6 are new records for the country. The remaining two species are new to science and are described here as <i>F. rufum</i> sp. nov. and <i>F. floriferum</i> sp. nov. Targeted fungal isolation from specific beetle body parts revealed that the AFC species collected were typically associated with the dissected beetle heads and helped us identify the likely nutritional symbiont of <i>E. xanthopus</i>. This study highlights the understudied diversity of fungal associates of ambrosia beetles present in South Africa.</p>","PeriodicalId":18779,"journal":{"name":"Mycologia","volume":" ","pages":"1063-1082"},"PeriodicalIF":2.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142350347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MycologiaPub Date : 2024-11-01Epub Date: 2024-08-13DOI: 10.1080/00275514.2024.2374208
Muhammad Haqnawaz, Muhammad Usman, Aman Javaid, Farkhanda Ramzan, Ayesha Bibi, Abdul Rehman Niazi, Arooj Naseer, Najam Ul Sehar Afshan, Abdul Nasir Khalid
{"title":"Four new species of <i>Candolleomyces</i> (Psathyrellaceae) from the Punjab Plains, Pakistan.","authors":"Muhammad Haqnawaz, Muhammad Usman, Aman Javaid, Farkhanda Ramzan, Ayesha Bibi, Abdul Rehman Niazi, Arooj Naseer, Najam Ul Sehar Afshan, Abdul Nasir Khalid","doi":"10.1080/00275514.2024.2374208","DOIUrl":"10.1080/00275514.2024.2374208","url":null,"abstract":"<p><p>The purpose of this study is to explore the genus <i>Candolleomyces</i> from Pakistan. Fungal surveys were conducted in different sites of the Punjab plains during the 2016-2022 period. Several specimens belonging to the family Psathyrellaceae were collected. Traditional morphology and multigene phylogenetic analyses confirmed the novelty and placement of the species in genus <i>Candolleomyces</i>. The phylogenetic study of the nuc rDNA internal transcribed spacer ITS1-5.8S-ITS2 (ITS) and partial 28S rRNA regions confirmed the distinct positions of four new taxa, <i>Candolleomyces iqbalii, C. kotadduensis, C. pakistanicus</i>, and <i>C. parvipileus</i>, in the genus. Currently, the genus consists of 43 species worldwide. However, with the inclusion of these four species, the total number has risen to 47. Detailed descriptions, phylogeny, comparisons, and illustrations are provided.</p>","PeriodicalId":18779,"journal":{"name":"Mycologia","volume":" ","pages":"1033-1045"},"PeriodicalIF":2.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141976151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MycologiaPub Date : 2024-11-01Epub Date: 2024-08-14DOI: 10.1080/00275514.2024.2364567
Jeffery K Stallman, Peter R Johnston, Edgar B Lickey, Maria Marlin, Tina Melie, C Alisha Quandt, M Catherine Aime, Danny Haelewaters
{"title":"Recent fieldwork and fungarium studies double known diversity of <i>Chlorosplenium</i> and improve understanding of species distributions.","authors":"Jeffery K Stallman, Peter R Johnston, Edgar B Lickey, Maria Marlin, Tina Melie, C Alisha Quandt, M Catherine Aime, Danny Haelewaters","doi":"10.1080/00275514.2024.2364567","DOIUrl":"10.1080/00275514.2024.2364567","url":null,"abstract":"<p><p><i>Chlorosplenium</i> is a small genus comprising five species of inoperculate discomycetes in the order Helotiales (Leotiomycetes) often recognizable by their bright yellowish-green colors and gregarious growth on wood. In this study, we describe five new species-<i>C. aotearoa, C. australiense, C. cusucoense, C. epimorsicum</i>, and <i>C. hawaiiense</i>-based on a combination of recent fieldwork and examination of previously collected fungarium specimens. We use an integrative taxonomic approach to support the distinction of new species, incorporating morphology and DNA sequence data with biogeography. Macro- and micromorphological features of apothecia for all species and culture characteristics for four of the five new species are documented. A multilocus phylogeny based on nuc rDNA internal transcribed spacer region ITS1-5.8S-ITS2, partial large subunit nuc ribosomal DNA (28S nuc rDNA), and A-B regions of the largest subunit of RNA polymerase II (<i>RPB1</i>) gene is presented. Additionally, we report <i>Chlorosplenium chlora</i> from Europe for the first time and expand our knowledge of the diversity and distributions of species in this genus in America, Australia, and New Zealand.</p>","PeriodicalId":18779,"journal":{"name":"Mycologia","volume":" ","pages":"993-1018"},"PeriodicalIF":2.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141982706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
MycologiaPub Date : 2024-11-01Epub Date: 2024-08-23DOI: 10.1080/00275514.2024.2367470
Elizaveta Lukina, Maria Gomzhina, Anna Dalinova, Vsevolod Dubovik, Ekaterina Gordina, Svetlana Bozhkova, Sergey Smirnov, Alexander Berestetskiy
{"title":"Reappraisal of <i>Didymella macrostoma</i> causing white tip disease of Canada thistle as a new species, <i>Didymella baileyae</i>, sp. nov., and bioactivity of its major metabolites.","authors":"Elizaveta Lukina, Maria Gomzhina, Anna Dalinova, Vsevolod Dubovik, Ekaterina Gordina, Svetlana Bozhkova, Sergey Smirnov, Alexander Berestetskiy","doi":"10.1080/00275514.2024.2367470","DOIUrl":"10.1080/00275514.2024.2367470","url":null,"abstract":"<p><p>Bioherbicides are expected to be a supplement to integrated pest management, assisting in the control of problematic weed species. For instance, bioherbicides (Phoma and BioPhoma) were recently registered in Canada and the USA for the control of some perennial dicotyledonous weeds in lawns. These products are based on strains of the fungus <i>Didymella macrostoma</i> (syn. <i>Phoma macrostoma</i>) that causes white tip disease (WTD) in Canada thistle (<i>Cirsium arvense</i>). In this study, WTD was reported for the first time in the Russian Federation. Analysis of the internal transcribed spacer (ITS) region of nuc rDNA and secondary metabolite profiling confirmed the identity of Russian WTD isolates to Canadian biocontrol strains identified as <i>D. macrostoma</i>. Multilocus phylogenetic analysis based on sequencing of the ITS region, partial large subunit nuc rDNA region (28S), RNA polymerase II second largest subunit gene (<i>rpb2</i>), and partial β-tubulin gene (<i>tub2</i>) has differentiated the WTD isolates from <i>C. arvense</i> and <i>D. macrostoma</i> isolates from other plant hosts. Based on phylogenetic, morphological, and chemotaxonomic features, these WTD isolates were described as a new species named <i>Didymella baileyae</i>, sp. nov. This study also demonstrated the low pathogenicity of the ex-type <i>D. baileyae</i> isolate VIZR 1.53 to <i>C. arvense</i> seedlings and its asymptomatic development in the leaves of aboveground shoots. The organic extracts from mycelium and culture filtrate of <i>D. baileyae</i>, as well as macrocidin A and macrocidin Z, displayed phytotoxicity both to <i>C. arvense</i> leaves and seedlings. Macrocidin A was only detected in the naturally infected leaf tissues of <i>C. arvense</i> showing WTD symptoms. Macrocidins A and Z demonstrated low antimicrobial and cytotoxic activities, exhibiting no entomotoxic properties. The data obtained within this study on the pathogenicity and metabolites of <i>D. baileyae</i> may be important for the rational evaluation of its prospects as a biocontrol agent.</p>","PeriodicalId":18779,"journal":{"name":"Mycologia","volume":" ","pages":"877-902"},"PeriodicalIF":2.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142044060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}