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Powdery Mildew of Prairie Gentian: Characteristics, Molecular Phylogeny and Pathogenicity
被引：9
作者：
Jun OKAMOTO
Saranya LIMKAISANG
Hidenobu NOJIMA
Susumu TAKAMATSU
机构：
[1] Oita Prefectural Floricultural Research Center,
[2] 710–1,undefined
[3] Tsurumi,undefined
[4] Beppu 874–0844,undefined
[5] Japan,undefined
[6] Faculty of Agriculture,undefined
[7] Chiang Mai University,undefined
[8] Chiang Mai 50200,undefined
[9] Thailand,undefined
[10] Kagoshima Prefectural Agricultural Experiment Station,undefined
[11] 5500,undefined
[12] Kamifukumoto,undefined
[13] Kagoshima 891–0116,undefined
[14] Japan,undefined
[15] Faculty of Bioresources,undefined
[16] Mie University,undefined
[17] 1515,undefined
[18] Kamihama,undefined
[19] Tsu 514–8507,undefined
[20] Japan,undefined
关键词：
Key words : broad bean, Erysiphaceae, Eustoma grandiflorum, garden four-o'clock, internal transcribed spacer, Oidium subgenus Pseudoidium.;
D O I：
10.1007/PL00013077
中图分类号：
学科分类号：
摘要：
In March 1999, we found prairie gentian (Eustoma grandiflorum) infected with powdery mildew in a greenhouse in Oita Prefecture, Japan. Morphological observation revealed that the causal fungus belongs to the mitosporic genus Oidium subgenus Pseudoidium [teleomorph: Erysiphe sensu Braun and Takamatsu (2000)]. Precise taxonomic position of the fungus, however, is uncertain due to lack of the perfect stage. We determined the nucleotide sequence of the rDNA ITS region of the fungus. Comparison of the sequence with those obtained from DNA databases of this fungal group revealed that the sequence is identical to those of powdery mildews from garden four-o'clock (Mirabilis jalapa) and broad bean (Vicia faba). Inoculation of an isolate from garden four-o'clock caused mildew on prairie gentian and broad bean, suggesting that the prairie gentian mildew originates from garden four-o'clock or broad bean. Molecular phylogenetic analysis indicated a close relationship of this fungus to Erysiphe baeumleri on Vicia spp. and E. trifolii on Trifolium pratense. From these results, we propose that prairie gentian mildew diverged from a Fabaceae-parasitic ancestor.
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页码：200 / 207
页数：7
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