Document Type : Plant Pathology
Authors
Abstract
In the framework of study on beech forests mycobiota in north of Iran during 2010- 2011, specimens of Fagus sylvatica twigs infected by a coelomycetes fungus were collected. During laboratory study, acervuli on branches were observed with following characteristic features:
Acervuli were up to 1.5 mm in diameter. These fruting bodies were subepidermal at first, splitting irregularly to expose the dark spore mass later. Conidiogenous cells cylindrical, hyaline. Mature conidia massive, dark brown, smooth in pulvinate acervuli on twigs. Conidia appear as star shape that consisting of 4 arms at 90˚ to each other. The length of conidia 20-55 μm from tip to tip of the branches which were 10-25 μm thick at the base. Conidia are formed solitary at the apex of coniodiophores (Fig 1). The above morphological features were fitted to earlier description of Asterosporium asterospermum (Pers.) S. Hughes (Sutton, 1980. The Coelomycetes). This species has been previously reported on Fagus spp. in central Europe and Canada. This is the first report of A. asterospermum forIranian mycobiota.
Specimens examinated: On twigs of F. sylvatica., May 4, 2011, Mazandaran province (Kelardasht), Jamshid Boujari (IRAN 15686 F).
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