Mycobiology.  2017 Dec;45(4):263-269. 10.5941/MYCO.2017.45.4.263.

Taxonomy and Phylogeny of Peronospora Species (Oomycota) Parasitic to Stellaria and Pseudostellaria in Korea, with the Introduction of Peronospora casparyi sp. nov.

• Lee JS
• Shin HD
• Lee HB
• Choi YJ

• KMID: 2401056
• DOI: http://doi.org/10.5941/MYCO.2017.45.4.263

Abstract

The genus Peronospora, an obligate biotrophic group belonging to Oomycota, causes serious damage to a variety of wild and ornamental plants, as well as cultivated crops, such as beet, rose, spinach, and tobacco. To investigate the diversity of Peronospora species parasitic to Stellaria and Pseudostellaria (Caryophyllaceae) plants in Korea, we performed a morphological analysis on dried herbarium specimens and molecular phylogenetic inferences based on internal transcribed spacer rDNA and cox2 mitochondrial DNA sequences. As a result, it was confirmed that there are four species of Peronospora parasitic to specific species of Stellaria and Pseudostellaria, all of which were hitherto unrecorded in Korea: P. alsinearum (ex Stellaria media), P. stellariae-aquaticae (ex Stellaria aquatica), P. stellariae-uliginosae (ex Stellaria alsine), and P. pseudostellariae (ex Pseudostellaria palibiniana). In addition, Peronospora specimens parasitic to Pseudostellaria davidii differed morphologically from P. pseudostellariae owing to the large and ellipsoidal conidia; this morphological discrepancy was also validated by the high genetic divergence between the two species. Peronospora casparyi sp. nov. is described and illustrated here.

Keyword

Barcoding; Caryophyllaceae; cox2; Diversity; Host specificity

MeSH Terms

Beta vulgaris
Caryophyllaceae
Classification*
DNA, Mitochondrial
DNA, Ribosomal
Host Specificity
Korea*
Oomycetes
Peronospora*
Phylogeny*
Spinacia oleracea
Spores, Fungal
Stellaria*
Tobacco
DNA, Mitochondrial
DNA, Ribosomal