Gene Transfer from the Zygomycete Parasitella parasitica to its Hosts: An Evolutionary Link Between Sex and Parasitism?

摘要: Parasitella parasitica (synonyms: P. and Mucor parasiticus) is a heterothallic facultative mycoparasite which belongs phylogenetically to the group within zygomycetes. It parasite of several but not all mucoraceous fungi. The interactions between host present peculiarities. (1) Infection organism Absidia glauca especially strongly mating type-specific. (+) strains will infect exclusively (-) A. whereas are required for infection type hosts. We propose hypothesis that host/parasite recognition mediated by same gamone system as communication sexual partners mucorales (trisporic acid). (2) fusion biotroph. accompanied limited cytoplasmic continuum two partners, allows invasion nuclei parasite. very aggressive. host, survives well forms normal sporangiospores even close sites. were able demonstrate genetic molecular techniques markers transferred into host’s at high rates. form naturally occurring parasexual with efficiency. (3) Sexually compatible pairs zygospores. In order reproduce sexually least one has grow parasitically. Measurements trisporic acid levels in cocultures led us assume interaction cooperative synthesis level enough induce differentiation.