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Home • Ilyonectria robusta PMI_751 v1.0
Ilyonectria robusta PMI_751 (1113390)
Culture morphology of I. robusta on potato dextrose agar. Left: Colony after 3 wk growth; Mid: Conidiogenous cells; Top-right: Chlamydospores; Bottom-right: Microconidia and macroconidia. Bar=10 um. Photo credits: Yi-Hong Ke.

Ilyonectria robusta PMI_751 (1113390)

Ilyonectria robusta and other Ilyonectria spp. are common soil fungi, non-symptomatic root endophytes, and opportunistic plant root pathogens1. In order to understand their function in forest soils, genome data of of these and other common root-associated fungi are necessary to provide a reference database for studying metagenomics of rhizosphere plant-fungal interactions.


 Ilyonectria robusta PMI_751 was isolated as an endophyte from Populus trichocarpa roots. I. robusta is also frequently reported as a root rot pathogen of grapevine, but has also been isolated from other tree hosts including Populus, Quercus, Tilia, Panax, and Prunus. Ilyonectria is one of many genera in the Neonectria complex2,3. Strains of this species produce both microconidia and macroconidia. Brown thick-walled chlamydospores are also abundantly formed in older cultures3. Concentric pigmented bands often appear in cultures grown on potato dextrose agar.


This work is supported by the Genomic Science Program (U.S. Department of Energy) Plant Microbe Interfaces (PMI) Scientific Focus Area (http://pmi.ornl.gov) and by the Joint Genome Institute (U.S. Department of Energy) through their Community Sequencing Program (CSP 1974, 1KFG: Deep Sequencing of Ecologically-relevant Dikarya, F. Martin PI).

Researchers who wish to publish analyses using data from unpublished 1KFG genomes are respectfully required to contact the PIs and JGI to avoid potential conflicts on data use and coordinate other publications with the 1KFG master paper(s).




  1. Chaverri, P., Salgado, C., Hirooka, Y., Rossman, A. Y. & Samuels, G. J. Delimitation of Neonectria and Cylindrocarpon (Nectriaceae, Hypocreales, Ascomycota) and related genera with Cylindrocarpon-like anamorphs. Stud. Mycol. 68, 57–78 (2011).

  2. Santos, dos, R. F. et al. First Report of Ilyonectria robusta Associated with Black Foot Disease of Grapevine in Southern Brazil. http://dx.doi.org/10.1094/PDIS-09-13-0935-PDN 98, 845–845 (2014).

  3. Cabral, A., Groenewald, J. Z., Rego, C., Oliveira, H. & Crous, P. W. Cylindrocarpon root rot: multi-gene analysis reveals novel species within the Ilyonectria radicicola species complex. Mycol Progress 11, 655–688 (2011).