Morphological and molecular analyses support the existence of host-specific Peronospora species infecting Chenopodium

Young Joon Choi, Cvetomir M. Denchev, Hyeon-Dong Shin

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

About 20 species of Peronospora have been reported to cause downy mildew on Chenopodium, but, particularly in plant pathology literature, only one species, P. farinosa, is considered to be involved. We performed sequence analysis of the ITS rDNA to reveal the phylogenetic relationships of Peronospora specimens from five species of Chenopodium, viz. C. album, C. ambrosioides, C. bonus-henricus, C. hybridum, and C. polyspermum. The five clades corresponded to particular Chenopodium species, and showed a high level of sequence divergence. Differences in the morphology of the conidia and ultimate branchlets also supported the separation of the five groups at the host species level. These results suggest that the names P. variabilis, P. boni-henrici, P. chenopodii, and P. chenopodii-polyspermi should be used for the four downy mildew pathogens specific to C. album, C. bonus-henricus, C. hybridum, and C. polyspermum, respectively. The Peronospora on C. ambrosioides was found to be an independent species.

Original languageEnglish
Pages (from-to)155-164
Number of pages10
JournalMycopathologia
Volume165
Issue number3
DOIs
Publication statusPublished - 2008 Mar 1

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Peronospora
Chenopodium
downy mildew
Chenopodium hybridum
Peronospora farinosa
Chenopodium ambrosioides
Plant Pathology
Fungal Spores
Chenopodium album
plant pathology
Ribosomal DNA
conidia
Names
Sequence Analysis
sequence analysis
pathogens
phylogeny

Keywords

  • Chenopodiaceae
  • Evolution
  • Host specificity
  • ITS rDNA
  • Phylogenetic analysis

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Plant Science

Cite this

Morphological and molecular analyses support the existence of host-specific Peronospora species infecting Chenopodium. / Choi, Young Joon; Denchev, Cvetomir M.; Shin, Hyeon-Dong.

In: Mycopathologia, Vol. 165, No. 3, 01.03.2008, p. 155-164.

Research output: Contribution to journalArticle

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