2004 Fiscal Year Final Research Report Summary
Analysis of host exponsion sorategy of the Erysiphales using moleculor phylogenetic techniques
| Project/Area Number |
13660047
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
植物保護
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| Research Institution | Mie University |
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Principal Investigator |
TAKAMATSU Susumu Mie University, Faculty of Bioresources, Professor, 生物資源学部, 教授 (20260599)
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| Co-Investigator(Kenkyū-buntansha) |
SATO Yukio Toyama Prefectural University, College of Technology, Associate Professor, 助教授 (20104979)
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| Project Period (FY) |
2001 – 2004
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| Keywords | powdery mildew / phylogeny / evolution / nucleotide sequence / rDNA / ITS |
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| Research Abstract |
1.Phylogenetic analyses based on the nucleotide sequences of the nuclear ribosomal DMA revealed that the powdery mildew fungi are divided into five major lineages. The respective lineage was well defined by the morphology of conidial stage, but not of ascomata. In this fungal group, tree-parasitic taxa are generally ancestral, and multiple times of host expansion from trees to herbs have occurred within the respective lineage. Accompanying with the host expansion to herbs, simplification of appendage morphology has occurred multiple times. The simple, mycelioid appendages are thus a result of convergence. Host expansion route was investigated in detail in the tribe Cystotheceae. Two sections of the genus Sphaerotheca were derived from the genus Podosphaera separately. The section Magnicellulatae was derived from a Podosphaera species parasitic to Prunus (Rosaceae), acquired parasitism to the Scrophulariaceae, and then expanded host range into the Asteraceae. After genetic radiation on
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the Asteraceae, they further expanded their host ranges into other plant families. According to the molecular clock (1.26%/100 myr) reported by Berbee and Taylor (2001), splitting of the Erysiphales and the Myxotrichaceae and first divergence within the Erysiphales was calculated to have occurred 100 and 76 myr ago, respectively.
2.Five major groups, each represented by isolates from a single tribe of the Asteraceae, were identified in Golovinomyces taxa analyzed in this study. Host plants of four groups were strictly restricted to the Asteraceae. The fifth group, the Lactuceae group, is a large group composed of isolates collected from the tribe Lactuceae of the Asteraceae and all other plant families, which suggests a close affinity between Golovinomyces and the Asteraceae in the early stages of their evolution. We suggest that there are two different phases in the evolutionary history of the host-parasite relationships of Golovinomyces. One phase is divergence in accord with the phytogeny of their hosts, which occurred within the Asteraceae. The another phase is host-jumping, which occurred from the Asteraceae to other families and within the Asteraceae. Less
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Research Products
(48 results)
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[Journal Article] A new subgenus, Microidium, of Oidium (Erysiphaceae) on Phyllanthus spp.2005
Author(s)
To-anun, C., Kom-un, S., Limkaisang, S., Fangfuk, W., Sato, Y., Takamatsu, S.
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Journal Title
Mycoscience 46(1)
Pages: 1-8
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Morphological and molecular characterization for a Japanese isolate of tomato powdery mildew Oidium neolycopersici and its host range.2003
Author(s)
Kashimoto, K., Matsuda, Y., Matsutani, K., Sameshima, T., Kakutani, K., Nonomura, T, Okada, K., Kusakari, S., Nakata, K., Takamatsu, S., Toyoda, H.
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Journal Title
J.Gen.Plant Pathol. 69(3)
Pages: 176-185
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] A new species of Brasiliomyces (Erysiphaceae) on Dalbergia cultrata var.cultrata from Thailand.2003
Author(s)
To-anun, C., Limkaisang, S., Fangfuk, W., Sato, Y., Braun, U., Takamatsu, S.
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Journal Title
Mycoscience 44(6)
Pages: 447-451
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Two Erysiphe species associated with recent outbreak of soybean powdery mildew : consequence from molecular phylogenetic analysis based on nuclear rDNA sequences.2002
Author(s)
Takamatsu, S., Shin, H.-D., Paksiri, U., Limkaisang, S., Taguchi, Y., Thi Binh, N., Sato, Y.
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Journal Title
Mycoscience 43(3)
Pages: 333-341
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Spread of the North American snowberry powdery mildew fungus, Erysiphe symphoricarpi (syn.Microsphaera symphoricarpi), to Europe.2002
Author(s)
Kiss, L., Bolay, A., Takamatsu, S., Cook, R.T.A., Limkaisang, S., Ale-Agha, N., Azentivanyi, O., Boal, R.J., Jefferies, P.
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Journal Title
Mycol.Res. 106(9)
Pages: 1086-1092
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Identification of two powdery mildew fungi, Oidium neolycopersici sp.nov.and an Oidium subgenus Reticuloidium, infecting tomato in different parts of the world.2001
Author(s)
Kiss, L, Cook, R.T.A., Saenz, G.S., Cunnington, J.H, Takamatsu, S., Pascoe, I., Bardin, M., Nicot, P.C., Sato, Y., Rossman, A.Y.
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Journal Title
Mycol.Res. 105(6)
Pages: 684-697
Description
「研究成果報告書概要(欧文)」より
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