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Home • Cryptodiaporthe sp. AZ0812 v1.0
Cryptodiaporthe sp. AZ0812 on 2% malt extract agar (MEA). photo credit: J. M. U'Ren.
Cryptodiaporthe sp. AZ0812 on 2% malt extract agar (MEA). photo credit: J. M. U'Ren.

Cryptodiaporthe sp. AZ0812 was isolated in culture from a surface-sterilized leaf of the angiosperm Quercus hypoleucoides (Fagaceae) in southwestern Arizona as part of a study examining endophytic and endolichenic fungal communities across North America (U’Ren et al., 2012). We identified this isolate as an unidentified species of Cryptodiaporthe (Pezizomycotina, Sordariomycetes, Diaporthales, Gnomoniaceae) using ITS-partial LSU rDNA sequencing. Although currently placed in the Gnomoniaceae, phylogenetic evidence suggests that Cryptodiaporthe may reside within the Cryphonectriaceae (Begoude et al., 2010, Crane & Burgess, 2013). Previously studied Cryptodiaporthe species are pathogens of woody plants (e.g., Cryptodiaporthe corni causing cankers on Cornus in the United States, and C. melanocraspeda on Banksia in Australia; Beier et al., 2015; Shearer & Crane, 2015). Beier et al. (2015) found evidence that the lifecycle of C. corni can include a latent endophytic stage in stems. As an endophyte, the genome of AZ0812 is especially useful for comparative genomic analyses to examine the evolution of fungal pathogenicity and virulence.

Begoude, A.D.B. M., Gryzenhout, M.J. Wingfield, J. Roux. 2010. Aurifilum, a new fungal genus in the Cryphonectriaceae from Terminalia species in Cameroon. Antonie van Leeuwenhoek 98:263–278.

Beier, G.L., S.C. Hokanson, S.T. Bates, R.A. Blanchette. 2015. Aurantioporthe corni gen. et comb. nov., an endophyte and pathogen of Cornus alternifolia. Mycologia 104:66–79.

Crane, C., T.I. Burgess. 2013. Luteocirrhus shearii gen. sp. nov. (Diaporthales, Cryphonectriaceae) pathogenic to Proteaceae in the South Western Australian floristic region. IMA Fungus 4:111–122.

Shearer, B. L., C. E. Crane.2014. Genetic, morphological and pathogenic diversity in the canker pathogen Cryptodiaporthe melanocraspeda on Banksia. Australasian Plant Pathol. 44: 299–309.

U’Ren, J. M., F. Lutzoni, J. Miadlikowska, A. Laetsch & A. E. Arnold. 2012. Host- and geographic structure of endophytic and endolichenic fungi at a continental scale. American Journal of Botany. 99: 898–914.