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Home • Gaeumannomyces graminis var. tritici R3-111a-1
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Wheat plants displaying symptoms of take-all root disease (originally described as Ophiobolus graminis var. tritici). Photo by William M. Brown Jr., Bugwood.org

This genome was sequenced by the Broad Institute.

Description of Gaeumannomyces graminis has been quoted from Broad.

Gaeumannomyces graminis is a necrotrophic soilborne pathogen that colonizes the root and crown tissue of many members of the grass family (Poaceae). G. graminis is a member of the Gaeumannomyces-Phialophora complex of fungi, in which G. graminis represents the haploid homothallic asexual state. It is the most widely distributed of the Gaeumannomyces species and composed of four varieties, the most well known being G. graminis var. tritici, the etiologic agent of take-all disease of wheat and barley, and the most destructive root disease of wheat worldwide (Freeman and Ward 2004). In addition to var. tritici, the three other destructive varieties are: avenae, which causes take-all of oats and take-all patch on bentgrass turf, graminis, which causes black sheath rot of rice, Bermuda grass decline, and take-all root rot of St. Augustine grass (Datnoff et al., 1997), and maydis, the causative agent of take-all of maize. Roots of infected plants are invaded by infection hyphae that extend from dark runner hyphae. The infection hyphae produce hyphopodia, attachment and penetration structures similar to the appressoria of M. oryzae.


Genome Reference(s)


  • Magnaporthe comparative Sequencing Project, Broad Institute of Harvard and MIT