Abstract
Downy mildew is probably the most widespread and potentially destructive global disease of spinach (Spinacia oleracea). The causal agent of downy mildew disease on various plants of Chenopodiaceae, including spinach, is regarded as a single species, Peronospora farinosa. In the present study, the ITS rDNA sequence and morphological data demonstrated that P. farinosa from S. oleracea is distinct from downy mildew of other chenopodiaceous hosts. Fifty-eight spinach specimens were collected or loaned from 17 countries of Asia, Europe, Oceania, North and South America, which all formed a distinct monophyletic group. No intercontinental genetic variation of the ITS rDNA within Peronospora accessions causing spinach downy mildew disease was found. Phylogenetic trees supported recognition of Peronospora from spinach as a separate species. Microscopic examination also revealed morphological differences between Peronospora specimens from Spinacia and P. farinosa s. lat. specimens from Atriplex, Bassia, Beta, and Chenopodium. Consequently, the name Peronospora effusa should be reinstated for the downy mildew fungus found on spinach. Here, a specimen of the original collections of Peronospora effusa is designated as lectotype.
| Original language | English |
|---|---|
| Pages (from-to) | 381-391 |
| Number of pages | 11 |
| Journal | Mycological Research |
| Volume | 111 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2007 Apr 1 |
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Keywords
- Chenopodiaceae
- Downy mildew
- ITS rDNA
- Phylogenetic analysis
- Spinach
ASJC Scopus subject areas
- Agricultural and Biological Sciences (miscellaneous)
- Plant Science
Cite this
Re-consideration of Peronospora farinosa infecting Spinacia oleracea as distinct species, Peronospora effusa. / Choi, Young Joon; Hong, Seung Beom; Shin, Hyeon-Dong.
In: Mycological Research, Vol. 111, No. 4, 01.04.2007, p. 381-391.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Re-consideration of Peronospora farinosa infecting Spinacia oleracea as distinct species, Peronospora effusa
AU - Choi, Young Joon
AU - Hong, Seung Beom
AU - Shin, Hyeon-Dong
PY - 2007/4/1
Y1 - 2007/4/1
N2 - Downy mildew is probably the most widespread and potentially destructive global disease of spinach (Spinacia oleracea). The causal agent of downy mildew disease on various plants of Chenopodiaceae, including spinach, is regarded as a single species, Peronospora farinosa. In the present study, the ITS rDNA sequence and morphological data demonstrated that P. farinosa from S. oleracea is distinct from downy mildew of other chenopodiaceous hosts. Fifty-eight spinach specimens were collected or loaned from 17 countries of Asia, Europe, Oceania, North and South America, which all formed a distinct monophyletic group. No intercontinental genetic variation of the ITS rDNA within Peronospora accessions causing spinach downy mildew disease was found. Phylogenetic trees supported recognition of Peronospora from spinach as a separate species. Microscopic examination also revealed morphological differences between Peronospora specimens from Spinacia and P. farinosa s. lat. specimens from Atriplex, Bassia, Beta, and Chenopodium. Consequently, the name Peronospora effusa should be reinstated for the downy mildew fungus found on spinach. Here, a specimen of the original collections of Peronospora effusa is designated as lectotype.
AB - Downy mildew is probably the most widespread and potentially destructive global disease of spinach (Spinacia oleracea). The causal agent of downy mildew disease on various plants of Chenopodiaceae, including spinach, is regarded as a single species, Peronospora farinosa. In the present study, the ITS rDNA sequence and morphological data demonstrated that P. farinosa from S. oleracea is distinct from downy mildew of other chenopodiaceous hosts. Fifty-eight spinach specimens were collected or loaned from 17 countries of Asia, Europe, Oceania, North and South America, which all formed a distinct monophyletic group. No intercontinental genetic variation of the ITS rDNA within Peronospora accessions causing spinach downy mildew disease was found. Phylogenetic trees supported recognition of Peronospora from spinach as a separate species. Microscopic examination also revealed morphological differences between Peronospora specimens from Spinacia and P. farinosa s. lat. specimens from Atriplex, Bassia, Beta, and Chenopodium. Consequently, the name Peronospora effusa should be reinstated for the downy mildew fungus found on spinach. Here, a specimen of the original collections of Peronospora effusa is designated as lectotype.
KW - Chenopodiaceae
KW - Downy mildew
KW - ITS rDNA
KW - Phylogenetic analysis
KW - Spinach
UR - http://www.scopus.com/inward/record.url?scp=34249287352&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34249287352&partnerID=8YFLogxK
U2 - 10.1016/j.mycres.2007.02.003
DO - 10.1016/j.mycres.2007.02.003
M3 - Article
C2 - 17509849
AN - SCOPUS:34249287352
VL - 111
SP - 381
EP - 391
JO - Fungal Biology
JF - Fungal Biology
SN - 1878-6146
IS - 4
ER -