Gnomonia Cerastis as an Endophyte of Acer, Taxonomical and Ecological Aspects : Shoot and Foliage Diseases in Forest Trees. Proceedings of a Joint Meeting of the Working Parties Canker and Shoot Blight of Conifers (S2.06.02) Foliage Diseases (S2.06.04)

Florenz

1995

S. 100-105

16 Lit. Ang.

Bandaufführung

77397

The examination of Acer pseudoplatanus L. has shown that the Ascomycetes Cryptodiaporthe hystrix (Tode) Petrak, which occurs on dying twigs, and Gnomonia cerastis (Riess) Ces. P de Not., occurring on petioles and large leaf veins, are identical. They were previously assigned two different names due to their substrate. The first description of Gnomonia cerastis is approximately one-half century older than that of Cryptodiaporthe hystrix, so that the former name is valid according to the International Code of Botanical Nomenclature, and Cryptodiaporthe hystrix must be reduced to a synonym. These taxonomical results are especially of interest in light of modern endophyte research, which has shown the fungus in its anamorph Diplodina acerina (Pass.) Sutton to play an important ecological role. In Acer-species, Diplodina acerina was isolated as the most frequent endophytic fungus and research shows that it is an effective antagonist of the window gall midge (Dasineura vitrina Kffr.) of maple. Galls of this species showed a high mortality rate due to leaf-inhabiting fungi, and a large proportion were apparently killed by Diplodina acerina.