These difficulties could be overcome by using homothallic
or heterothallic strains in mixedmating type cultures, marking them so that the frequencies of different types in mixed populations can be followed through time.
Sexual structures produced by Phytophthora species after mating are called oospores and are produced by a single individual in homothallic
species, or when two individuals bearing different mating types come into contact in heterothallic species.
The causal agent is Plasmopara halstedii, an obligate biotroph oomycete from the Peronosporaceae family, diploid, homothallic
, and can reproduce sexually and asexually.
Heterokaryosis: its significance in wild homothallic
Ascomycetes and fungi imperfecti.
Description of zygospores in Tectimyces robustus and clarification on homothallic
species within Harpellales.