A new peronosporomycete, <Emphasis Type="Italic">Halioticida noduliformans</Emphasis> gen. et sp. nov., isolated from white nodules in the abalone <Emphasis Type="Italic">Haliotis</Emphasis> spp. from Japan |
| |
Authors: | Yasunori Muraosa Kyoko Morimoto Ayako Sano Kazuko Nishimura Kishio Hatai |
| |
Institution: | (1) Laboratory of Fish Diseases, Nippon Veterinary and Life Science University, Tokyo 180-8602, Japan;(2) Research Center for Pathogenic Fungi and Microbial Toxicoses, Chiba University, Chiba, Japan |
| |
Abstract: | Four strains belonging to the Peronosporomycetes (formerly Oomycetes) were isolated from white nodules found on the mantle
of three species of abalone. In artificial seawater, the four isolates formed fragments such as in the genus Haliphthoros, but the protoplasm constriction was weaker, and fragments were longer, with smaller spaces between them, than those of Haliphthoros. The four strains form one or more discharge tubes from each zoosporangium. The four strains were similar, but not identical,
to the genus Haliphthoros based on morphological characteristics. As a result, the four isolates were classified in a new genus and species, Halioticida noduliformans gen. et sp. nov. Phylogenetic analysis of the D1/D2 region of the large subunit ribosomal RNA gene (LSU rDNA) was performed,
and the four isolates showed 100%–99.8% concordance. In the phylogenetic tree, the four isolates were not classified in the
subclass Peronosporomycetidae, Saprolegniomycetidae, or Rhipidiomycetidae. However, the four isolates formed a new clade with
genera Haliphthoros and Halocrusticida in Peronosporomycetes. Within this new clade, the four isolates, Haliphthoros spp. and Halocrusticida spp., were grouped in their respective independent subclades. These results showed that these were the new genus and species
from the morphological characteristics. |
| |
Keywords: | Abalone D1/D2 region of LSU rDNA Halioticida noduliformans Haliotis spp Peronosporomycetes |
本文献已被 ScienceDirect SpringerLink 等数据库收录! |
|