Ultrastructural characterization of the host-parasite interface between Allomyces anomalus (Blastocladiomycota) and Rozella allomycis (Cryptomycota).

摘要: Rozella allomycis is an obligate endoparasite of the water mold Allomyces and a member clade (= Opisthosporidia) sister to traditional Fungi. Gaining insights into Rozella's development as phylogenetically pivotal can aid our understanding structural adaptations evolution Opisthosporidia clade, especially within context genomic information. The purpose this study characterize interface between R. anomalus. Electron microscopy developing plasmodia in host hyphae shows that consists three-membrane layers, interpreted parasite's plasma membrane (inner one layer) cisterna (outer two layers). As sporangial resting spore develop, mitochondria typically cluster at surface parasite eventually align parallel layered interface. have only few cristae mitochondrial matrix sparse, clearly distinguishing from those host. Consistent with expected organellar topology if phagocytize cytoplasm, phagocytic vacuoles are first bounded by layers host-type lining inner membrane. Thus, nutrition, least part, phagotrophic contrast osmotrophic nutrition fungi.