Pyrenophora tritici-repentis

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Pyrenophora tritici-repentis
Scientific classification
Kingdom: Fungi
Phylum: Ascomycota
Class: Dothideomycetes
Subclass: Pleosporomycetidae
Order: Pleosporales
Family: Pleosporaceae
Genus: Pyrenophora
Species: P. tritici-repentis
Binomial name
Pyrenophora tritici-repentis
(Died.) Drechsler, (1923)

Drechslera tritici-repentis
Drechslera tritici-vulgaris
Helminthosporium gramineum f.sp. tritici-repentis
Helminthosporium tritici-repentis
Helminthosporium tritici-vulgaris
Pleospora culmorum
Pleospora sarcocystis
Pleospora trichostoma
Pyrenophora tritici-vulgaris
Pyrenophora sarcocystis
Pyrenophora trichostoma
Pyrenophora tritici-vulgaris
Sphaeria culmorum
Sphaeria sarcocystis
Sphaeria trichostoma

Pyrenophora tritici-repentis is a plant pathogen of fungal origin, causing a disease called tan spot or helminthosporiosis, that affects mainly wheat in its more common varieties. It forms characteristic, dark, oval-shaped spots of necrotic tissue surrounded by a yellow ring.[1] It is responsible for losses that account for up to 30% of the crop,[2] due to its effects reducing photosynthesis. Pathogenesis and toxicity in P. tritici-repentis is controlled by a single gene, transformations of this gene cause the pathogen to become benign when interacting with wheat.[3] This has major implications for those in agriculture seeking to combat the effects of this fungus.


  1. ^ - Control de enfermedades en cereales de invierno. Web consulted June 6th, 2008.
  2. ^ Manejo de las enfermedades del trigo. Pérez Fernández, Jesús & Corro Molas, Andrés. Web consulted June 1, 2008.
  3. ^ [1]

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