Pythium apinafurcum: its morphology, molecular phylogeny, and infectivity for plants

Draft Genome Sequences of the Oomycete Pilasporangium apinafurcum Strains JCM 30513 and JCM 30514, Formerly Classified as Pythium apinafurcum

Pilasporangium apinafurcum, formerly classified as Pythium apinafurcum, is a unique oomycete that infects plants asymptomatically. Here, we present the draft genome sequences of two variants of P. apinafurcum, JCM 30513 and JCM 30514, isolated from uncultivated field soil in Wakayama Prefecture, Japan.

Globisporangium oryzicola sp. nov., causing poor seedling establishment of directly seeded rice

A new species, Globisporangium oryzicola, was isolated from directly seeded rice seedlings, and from soils of paddy fields and an uncultivated field. Despite their different origins, five of the seven isolates studied caused poor seedling establishment of rice in a laboratory inoculation experiment. The species is characterized by oogonia with smooth-walled or sometimes one projection, with one to two antheridia, and aplerotic oospores. Hyphal swellings were rarely observed. Phylogenetic analyses based on the internal transcribed spacer region of the ribosomal RNA gene and mitochondrial cytochrome c oxidase subunit 1 and 2 genes confirmed that the species differed from other Globisporangium species. This novel species is described and illustrated in detail.