Pyrenophora

Pyrenophora
Black Fingers of Death (Pyrenophora seminiperda) on cheat grass (Bromus secalinus L.)
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Ascomycetes
Order:	Pleosporales
Family:	Pleosporaceae
Genus:	Pyrenophora Fr.
Type species
Pyrenophora phaeocomes (Rebent.) Fr.
Species
Pyrenophora avenae Pyrenophora chaetomioides Pyrenophora graminea Pyrenophora seminiperda Pyrenophora teres Pyrenophora teres f. maculata Pyrenophora teres f. teres Pyrenophora tritici-repentis

The fungal genus Pyrenophora includes 191 species [1], including the following plant pathogenic species: P. teres, P. graminea and P. tritici-repentis.

P. teres (teleomorph Drechslera teres) makes up to 3 conidia per conidiophore. It infects plants with an appressorium. It grows biotrophically in the first infected plant cell, but then switches to a necrotrophic growth mode. During necrotrophic growth the fungus can only be found in the plant apoplast but not within plant cells.