Novel Cryphonectriaceae from La Réunion and South Africa, and their pathogenicity on Eucalyptus

Ali, Daniel Babangida Ali Babangida; Marincowitz, Seonju; Wingfield, Michael J.; Roux, Jolanda; Crous, Pedro W.; McTaggart, Alistair R.

doi:10.1007/s11557-018-1408-3

Cited by 10 publications

(20 citation statements)

References 39 publications

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“…The Cryphonectriaceae accommodates fungi previously classified in the Cryphonectria - Endothia complex ( Castlebury et al 2002 , Gryzenhout et al 2006c ), which was established to include Cryphonectria , Endothia and three other genera, namely Amphilogia , Chrysoporthe , and Rostraureum ( Gryzenhout et al 2006c ). Currently, 25 genera have been identified and described in the Cryphonectriaceae ( Cheewangkoon et al 2009 , Gryzenhout et al 2009 , 2010 , Begoude et al 2010 , Vermeulen et al 2011 , 2013 , Crous et al 2012a , b , 2015 , Chen et al 2013a , b , 2016 , 2018 , Crane & Burgess 2013 , Beier et al 2015 , Ali et al 2018 , Ferreira et al 2019 ). With the exception of Chrysocrypta , Chrysofolia , and Foliocryphia , which were isolated from leaf spots of eucalypts ( Myrtaceae , Myrtales ) ( Cheewangkoon et al 2009 , Crous et al 2012a , b , 2015 , 2019 ) and healthy leaves of Barringtonia acutangula ( Lecythidaceae , Ericales ) ( Suwannarach et al 2016 ), the other genera were isolated from trees associated with blight, die-back or canker ( Gryzenhout et al 2009 , 2010 , Begoude et al 2010 , Vermeulen et al 2011 , 2013 , Chen et al 2013a , b , 2016 , 2018 , Crane & Burgess 2013 , Beier et al 2015 , Ali et al 2018 , Ferreira et al 2019 , Jiang et al 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Cryphonectriaceae on Myrtales in China: phylogeny, host range, and pathogenicity

Wang

Liu

et al. 2020

persoonia

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Plantation-grown Eucalyptus (Myrtaceae) and other trees residing in the Myrtales have been widely planted in southern China. These fungal pathogens include species of Cryphonectriaceae that are well-known to cause stem and branch canker disease on Myrtales trees. During recent disease surveys in southern China, sporocarps with typical characteristics of Cryphonectriaceae were observed on the surfaces of cankers on the stems and branches of Myrtales trees. In this study, a total of 164 Cryphonectriaceae isolates were identified based on comparisons of DNA sequences of the partial conserved nuclear large subunit (LSU) ribosomal DNA, internal transcribed spacer (ITS) regions including the 5.8S gene of the ribosomal DNA operon, two regions of the β-tubulin (tub2/tub1) gene, and the translation elongation factor 1-alpha (tef1) gene region, as well as their morphological characteristics. The results showed that eight species reside in four genera of Cryphonectriaceae occurring on the genera Eucalyptus, Melastoma (Melastomataceae), Psidium (Myrtaceae), Syzygium (Myrtaceae), and Terminalia (Combretaceae) in Myrtales. These fungal species include Chrysoporthe deuterocubensis, Celoporthe syzygii, Cel. eucalypti, Cel. guangdongensis, Cel. cerciana, a new genus and two new species, as well as one new species of Aurifilum. These new taxa are hereby described as Parvosmorbus gen. nov., Par. eucalypti sp. nov., Par. guangdongensis sp. nov., and Aurifilum terminali sp. nov. Pathogenicity tests showed that the eight species of Cryphonectriaceae are pathogenic to two Eucalyptus hybrid seedlings, Melastoma sanguineum branches, and Psidium guajava and Syzygium jambos seedlings. The overall data showed that Chr. deuterocubensis is the most aggressive, followed by Par. eucalypti. Significant differences in tolerance were observed between the two tested Eucalyptus hybrid genotypes, suggesting that disease-tolerant genotypes can be selected for disease management in the Eucalyptus industry.

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Section: Introductionmentioning

confidence: 99%

Cryphonectriaceae on Myrtales in China: phylogeny, host range, and pathogenicity

Wang

Liu

et al. 2020

persoonia

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“…paradisiaca, Cel. syzygii and Cel. tibouchinae in the Asian clade (Chen et al 2011;Ali et al 2018;Wang et al 2018) and three species, Cel. dispersa, Cel.…”

Section: Discussionmentioning

confidence: 99%

Supplementary material 2 from: Roux J, Kamgan Nkuekam G, Marincowitz S, van der Merwe NA, Uchida J, Wingfield MJ, Chen SF (2020) Cryphonectriaceae associated with rust-infected Syzygium jambos in Hawaii. MycoKeys 76: 49-79. https://doi.org/10.3897/mycokeys.76.58406

Roux,

Kamgan Nkuekam,

Marincowitz

et al. 2020

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“…The ITS, BT1 and TEF1 gene regions were analysed separately and in combination. This made it possible to determine the phylogenetic relationships amongst the isolates from Hawaii and all 10 previously described Celoporthe species (Nakabonge et al 2006;Chen et al 2011;Vermeulen et al 2013;Ali et al 2018;Wang et al 2018). A PHT was used to determine if conflict existed amongst the ITS, BT1 and TEF1 datasets (Farris et al 1995;Huelsenbeck et al 1996).…”

Section: Phylogenetic Analysesmentioning

confidence: 99%

“…Fungi in the Cryphonectriaceae (Diaporthales) include at least twenty-three genera of bark-, wood-and leaf-infecting fungi (Gryzenhout et al 2009(Gryzenhout et al , 2010Begoude et al 2010;Vermeulen et al 2011Vermeulen et al , 2013Crous et al 2012;Chen et al 2013aChen et al , b, 2016Chen et al , 2018Crane and Burgess 2013;Beier et al 2015;Ali et al 2018;Ferreira et al 2019;Jiang et al 2020;Wang et al 2020). They occur on trees and shrubs in various parts of the world and include saprophytes, facultative parasites and important pathogens of woody plants (Gryzenhout et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Cryphonectriaceae associated with rust-infected Syzygium jambos in Hawaii

Roux¹,

Nkuekam²,

Marincowitz³

et al. 2020

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Syzygium jambos (Myrtales, Myrtaceae) trees in Hawaii are severely affected by a rust disease caused by Austropuccinia psidii (Pucciniales, Sphaerophragmiaceae), but they are commonly co-infected with species of Cryphonectriaceae (Diaporthales). In this study, S. jambos and other trees in the Myrtales were examined on three Hawaiian Islands for the presence of Cryphonectriaceae. Bark samples with fruiting bodies were collected from infected trees and fungi were isolated directly from these structures. Pure cultures were produced and the fungi were identified using DNA sequence data for the internal transcribed spacer (ITS) region, part of the β-tubulin (BT1) gene and the transcription elongation factor-1α (TEF1) gene. Five species in three genera of Cryphonectriaceae were identified from Myrtaceae tree samples. These included Chrysoporthe deuterocubensis, Microthia havanensis and three previously-unknown taxa described here as Celoporthe hauoliensis sp. nov., Cel. hawaiiensis sp. nov. and Cel. paradisiaca sp. nov. Representative isolates of Cel. hauoliensis, Cel. hawaiiensis, Cel. paradisiaca, Chr. deuterocubensis and Mic. havanensis were used in artificial inoculation studies to consider their pathogenicity on S. jambos. Celoporthe hawaiiensis, Cel. paradisiaca and Chr. deuterocubensis produced lesions on young S. jambos trees in inoculation trials, suggesting that, together with A. psidii, they may contribute to the death of trees. Microsatellite markers were subsequently used to consider the diversity of Chr. deuterocubensis on the Islands and thus to gain insights into its possible origin in Hawaii. Isolates of this important Myrtaceae and particularly Eucalyptus pathogen were found to be clonal. This provides evidence that Chr. deuterocubensis was introduced to the Hawaiian Islands as a single introduction, from a currently unknown source.

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Novel Cryphonectriaceae from La Réunion and South Africa, and their pathogenicity on Eucalyptus

Cited by 10 publications

References 39 publications

Cryphonectriaceae on Myrtales in China: phylogeny, host range, and pathogenicity

Cryphonectriaceae on Myrtales in China: phylogeny, host range, and pathogenicity

Supplementary material 2 from: Roux J, Kamgan Nkuekam G, Marincowitz S, van der Merwe NA, Uchida J, Wingfield MJ, Chen SF (2020) Cryphonectriaceae associated with rust-infected Syzygium jambos in Hawaii. MycoKeys 76: 49-79. https://doi.org/10.3897/mycokeys.76.58406

Cryphonectriaceae associated with rust-infected Syzygium jambos in Hawaii

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