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ARS Home » Pacific West Area » Corvallis, Oregon » Forage Seed and Cereal Research Unit » Research » Publications at this Location » Publication #64648


item Alderman, Stephen

Submitted to: Mycologia
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/4/1996
Publication Date: N/A
Citation: N/A

Interpretive Summary: An examination of published reports on G. temulenta and G. granigena, reported to be the same species, suggested that the fungi may represent separate species. Since G. temulenta is an important pathogen of forage grasses grown for seed, the identity of the pathogen is critical for proper disease diagnosis. This study was undertaken to determine if G. temulenta and G. granigena were identical. Results from this study suggest G temulenta and G. granigena are separate species.

Technical Abstract: Type specimens of Gloeotinia temulenta and a local collection from the United States were examined and microanatomical features compared with a type specimen of G. granigena to determine, if, as previously suggested, they were conspecific. Microanatomical examination revealed significant differences among the two species. The ascus apex was thicker in G temulenta than in G. granigena. Ascospores of G. temulenta were elliptical with bluntly pointed ends while those of G. granigena were generally elliptical with rounded ends. Bromus erectus, on which G. granigena was originally described, was found not to be a host of G. temulenta. These data indicate that G. temulenta and G. granigena represent distinct species of Gloeotinia.