Ribosomal DNA sequence divergence and group I introns within theLeucostomaspeciesL. cinctum,L. persoonii, andL. parapersooniisp. nov., ascomycetes that cause Cytospora canker of fruit trees

Adams, Gerard C.; Surve-Iyer, Rupa S.; Iezzoni, Amy

doi:10.1080/15572536.2003.11833153

Cited by 25 publications

(13 citation statements)

References 43 publications

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“…In total, 672 species epithets of Cytospora have been recorded in the Index Fungorum (April 2021;www.indexfungorum.org/). Recent studies reported that approximately 150 species of Cytospora caused branch canker and dieback on more than 130 woody host species (Spielman, 1985;Adams et al, 2002;Adams et al, 2005;Kirk et al, 2008;Fan et al, 2014a;Fan et al, 2014b;Fan et al, 2020;Pan et al, 2020;Pan et al, 2021). More than 1,137 species epithets of Diaporthe have been enumerated in the Index Fungorum (April 2021; www.…”

Section: Introductionmentioning

confidence: 99%

“…indexfungorum.org/), and over 200 species have been accepted recently (Udayanga et al, 2011;Dissanayake et al, 2017;Yang et al, 2020). These species are pathogenic, endophytic, or saprobic to a wide range of plant hosts (Adams et al, 2002;Adams et al, 2005;Udayanga et al, 2011;Fan et al, 2020). Some of these infect the stems, branches, twigs, and even roots of many commercial plants, and cause necrotic damage to young tissues, canker and dieback on branches, and, ultimately, the death of the host, resulting in serious economic losses (Fotouhifar et al, 2010;Udayanga et al, 2011;Udayanga et al, 2012a;Udayanga et al, 2012b;Guerrero and Peŕez, 2013b).…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies on species identification were conducted based on host affiliation and morphology, but different species can infect one host, and single species can infect multiple hosts (Adams et al, 2005;Yang et al, 2020;Zhu et al, 2020). Thus, accurate species identification requires polyphasic approaches based on ecology, additional morphological observations, and multi-locus phylogeny analyses (Harrington and Rizzo, 1999;Mostert et al, 2001;Adams et al, 2002;Adams et al, 2005;Udayanga et al, 2014a;Udayanga et al, 2014b;Du et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Cytospora and Diaporthe Species Associated With Hazelnut Canker and Dieback in Beijing, China

Hong

Pan

Tian

et al. 2021

Front. Cell. Infect. Microbiol.

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Hazelnut (Corylus heterophylla Fisch.) is an important nut crop in China but has been declining owing to the destructive effects of fungal branch canker and dieback. The identification and management of these pathogens are difficult because of the lack of attention to branch canker, insufficient understanding of phylogenetic, and overlapping morphological characteristics of the pathogens. In total, 51 strains were isolated from Chinese wild hazelnut in this study, and three species of Cytospora and two of Diaporthe were identified through morphological observation and multi-locus phylogenetic analyses (ITS, act, rpb2, tef1-α, and tub2 for Cytospora; ITS, cal, his3, tef1-α, and tub2 for Diaporthe). Three new species, Cytospora corylina, C. curvispora, and Diaporthe corylicola, and two known species, Cytospora leucostoma and Diaporthe eres, grew at 5–30°C and a pH of 3.0–11.0, with optimum growth at approximately 25°C and pH 4.0–7.0. Additionally, the effects of six carbon sources on mycelial growth were investigated. This study explored the main pathogenic fungi species of Corylus heterophylla, completed the corresponding database of pathogenic fungi information, and clarified their biological characteristics. Moreover, the results of this study provided a theoretical basis for Corylus heterophylla disease management and prevention in China.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cytospora and Diaporthe Species Associated With Hazelnut Canker and Dieback in Beijing, China

Hong

Pan

Tian

et al. 2021

Front. Cell. Infect. Microbiol.

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“…The traditional identification of Cytospora species was based heavily on their host affiliations; nevertheless, a single species of Cytospora may occur on a different host, and more than one Cytospora species may be isolated from a single host (Adams et al, 2005;Wang et al, 2011;Ariyawansa et al, 2015;Fan et al, 2015a,b;Hyde et al, 2016;Lawrence et al, 2018). Accurate identification needs additional informative morphological observation and multilocus phylogeny to test the relationship among species (Adams and Taylor, 1993;Harrington and Rizzo, 1999;Adams et al, 2002). Adams et al (2005) introduced 28 species of Cytospora from Eucalyptus by morphology and phylogeny using ITS sequence.…”

Section: Introductionmentioning

confidence: 99%

High Diversity of Cytospora Associated With Canker and Dieback of Rosaceae in China, With 10 New Species Described

et al. 2020

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Cytospora canker is a destructive disease of numerous hosts and causes serious economic losses with a worldwide distribution. Identification of Cytospora species is difficult due to insufficient phylogenetic understanding and overlapped morphological characteristics. In this study, we provide an assessment of 23 Cytospora spp., which covered nine genera of Rosaceae, and focus on 13 species associated with symptomatic branch or twig canker and dieback disease in China. Through morphological observation and multilocus phylogeny of internal transcribed spacer (ITS), large nuclear ribosomal RNA subunit (LSU), actin ( act ), RNA polymerase II subunit ( rpb2 ), translation elongation factor 1-α ( tef1- α), and beta-tubulin ( tub2 ) gene regions, the results indicate 13 distinct lineages with high branch support. These include 10 new Cytospora species, i.e., C. cinnamomea , C. cotoneastricola , C. mali-spectabilis , C. ochracea , C. olivacea , C. pruni-mume , C. rosicola , C. sorbina , C. tibetensis , and C. xinjiangensis and three known taxa including Cytospora erumpens , C. leucostoma , and C. parasitica . This study provides an initial understanding of the taxonomy of Cytospora associated with canker and dieback disease of Rosaceae in China.

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“…It includes important phytopathogens that cause dieback and canker disease on a wide range of plants, causing severe commercial and ecological damage and significant losses worldwide . Cytospora has been categorized under several coelomycetous genera in the dual-classification system, including asexual states of Leucostoma, Valsa, Valsella, and Valseutypella (Fries 1823;Saccardo 1884;Deng 1963;Tai 1979;Wei 1979;Spielman 1985;Wang et al 2011;Adams et al 2002). All the genera were recently combined under Valsa, either as subgenera or species with no additional infrageneric rank .…”

Section: Introductionmentioning

confidence: 99%

Cytospora species associated with canker disease of three anti-desertification plants in northwestern China

et al. 2015

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Cytospora species are important phytopathogens causing severe canker disease with a worldwide distribution and broad host range. However, identification of taxa to species level is difficult due to poor phylogenetic understanding and lack of sequenced type species. Morphological and phylogenetic studies have been carried out on several important hosts such as Eucalyptus and Malus in China, Iran, and South Africa. In this study destructive canker diseases of the anti-desertification plants, Elaeagnus angustifolia, Hippophae rhamnoides, and Salix psammophila, were investigated in northwest China. Multilocus phylogenetic analyses of ITS, nrLSU, RPB2, and ACT gene regions, combined with detailed morphological analyses and comparison with ex-type strains revealed six Cytospora species, C. chrysosperma, C. elaeagni, C. hippophaes, C. nivea, C. populina comb. nov. and C. gigaspora sp. nov. causing cankers on these hosts. The novel species C. gigaspora has flat multiple locules with a conceptacle and unusually long 12 μm conidia. Detailed descriptions and molecular data for the Cytospora species causing cankers on the three psammophilic host plants are provided. Cytospora elaeagni and C. hippophaes have previously been recorded from Elaeagnus angustifolia and Hippophae rhamnoides, whereas the other species causing Cytospora canker of Elaeagnus angustifolia and Salix psammophila are new records.

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Ribosomal DNA sequence divergence and group I introns within theLeucostomaspeciesL. cinctum,L. persoonii, andL. parapersooniisp. nov., ascomycetes that cause Cytospora canker of fruit trees

Cited by 25 publications

References 43 publications

Cytospora and Diaporthe Species Associated With Hazelnut Canker and Dieback in Beijing, China

Cytospora and Diaporthe Species Associated With Hazelnut Canker and Dieback in Beijing, China

High Diversity of Cytospora Associated With Canker and Dieback of Rosaceae in China, With 10 New Species Described

<p><strong><em>Cytospora</em> species associated with canker disease of three anti-desertification plants in northwestern China</strong></p>

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