The taxonomic position of the genus Heydenia (Pyronemataceae, Pezizales) based on molecular and morphological data

Molecular and morphological data indicate that the genus Heydenia is closely related to the cleistothecial ascomycete Orbicula (Pyronemataceae, Pezizales). Observations on the disposition and the immediate surroundings of immature spores within the spore capsule suggest that the Heydenia fruiting bodies are teleomorphs producing early evanescent asci in stipitate cleistothecia. The once advocated identity of Heydenia with Onygena is refuted on molecular grounds. Onygena arietina E. Fischer is transferred to Heydeni

The taxonomic position of the genus Heydenia (Pyronemataceae, Pezizales) based on molecular and morphological data

ISSN:1617-416XISSN:1861-895

Culture analysis and external interaction models of Mycelial growth

To investigate morphogenesis and in particular circularization mechanisms in young mycelia, we observe cultures of the zygomycete Mucor spinosus and develop discrete models of two-dimensional filamental branching growth. The models are based on the hypothesis that the fungus secretes a regulatory substance that diffuses into the surrounding medium and is detected by the growing hyphae. We also present a simple Markovian growth model without such a feedback, but yielding to analytical computations