Pythium kandovanense sp. nov., a fungus-like eukaryotic micro-organism (Stramenopila, Pythiales) isolated from snow-covered ryegrass leaves.
Pythiumkandovanense sp. nov. (ex-type culture CCTU 1813T = OPU 1626T = CBS 139567T) is a novel oomycete species isolated from Lolium perenne with snow rot symptoms in a natural grassland in East-Azarbaijan province, Iran. Phylogenetic analyses based on sequence data from internal transcribed spacer (ITS)-rDNA, coxI and coxII mitochondrial genes clustered our isolates in Pythium group E as a unique, well supported clade. Pythium kandovanense sp. nov. is phylogenetically and morphologically distinct from the other closely related species in this clade, namely Pythium rostratifingens and Pythium rostratum. Pythium kandovanense sp. nov. can be distinguished from these two species by its cylindrical sporangia and lower temperatures for optimum and maximum growth rate. The development of zoospores released through a shorter discharge tube is an additional morphological feature which can be used to differentiate Pythium kandovanense sp. nov. from Pythium rostratifingens. Laboratory inoculation tests demonstrated the pathogenicity of Pythium kandovanense sp. nov. to L. perenne under wet cold (0-3 °C) conditions.
Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Japan.|Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Iran.
Ali
A
Chenari Bouket
Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Iran.
Mahdi
M
Arzanlou
Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Japan.
Motoaki
M
Tojo
Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Iran.
Asadollah
A
Babai-Ahari
D021903:DNA, Ribosomal Spacer / Q000235:genetics; D007492:Iran; D008129:Lolium / Q000382:microbiology*; D008969:Molecular Sequence Data; D010802:Phylogeny; D010935:Plant Diseases / Q000382:microbiology*; D011775:Pythium / Q000145:classification* / Q000302:isolation & purification / Q000472:pathogenicity; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012914:Snow
D021903:DNA, Ribosomal Spacer; D012336:RNA, Ribosomal, 16S