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3. Phytophthora niederhauserii sp. nov., a polyphagous species associated with ornamentals, fruit trees and native plants in 13 countries

Author

Abad, Z. Gloria, Abad, Jorge A., Cacciola, Santa Olga, Pane, Antonella, Faedda, Roberto, Moralejo, Eduardo, Pérez-Sierra, Ana, Abad-Campos, Paloma, Alvarez-Bernaola, Luis A., Bakonyi, József, Józsa, András, Herrero, Maria Luz, Burgess, Treena I., Cunnington, James H., Smith, Ian W., Balci, Yilmaz, Blomquist, Cheryl, Henricot, Béatrice, Denton, Geoffrey, Spies, Chris, Mcleod, Adele, Belbahri, Lassaad, Cooke, David, Kageyama, Koji, Uematsu, Seiji, Kurbetli, İlker, and Değirmenci, Kemal

Published
2014

10. The Destructive Tree Pathogen Phytophthora ramorum Originates from the Laurosilva Forests of East Asia

Author

Jung Thomas, Horta Jung Marília, Webber Joan F., Kageyama Koji, Hieno Ayaka, Masuya Hayato, Uematsu Seiji, Pérez-Sierra Ana, Harris Anna R., Forster Jack, Rees Helen, Scanu Bruno, Patra Sneha, Kudláˇcek Tomáš, Janoušek Josef, Corcobado Tamara, Milenkovi´c Ivan, Nagy Zoltán, Csorba Ildikó, Bakonyi József, Brasier Clive M., Jung Thomas, Horta Jung Marília, Webber Joan F., Kageyama Koji, Hieno Ayaka, Masuya Hayato, Uematsu Seiji, Pérez-Sierra Ana, Harris Anna R., Forster Jack, Rees Helen, Scanu Bruno, Patra Sneha, Kudláˇcek Tomáš, Janoušek Josef, Corcobado Tamara, Milenkovi´c Ivan, Nagy Zoltán, Csorba Ildikó, Bakonyi József, and Brasier Clive M.

Published
2021

18. The Destructive Tree Pathogen Phytophthora ramorum Originates from the Laurosilva Forests of East Asia

Author

Jung, Thomas, primary, Horta Jung, Marília, additional, Webber, Joan F., additional, Kageyama, Koji, additional, Hieno, Ayaka, additional, Masuya, Hayato, additional, Uematsu, Seiji, additional, Pérez-Sierra, Ana, additional, Harris, Anna R., additional, Forster, Jack, additional, Rees, Helen, additional, Scanu, Bruno, additional, Patra, Sneha, additional, Kudláček, Tomáš, additional, Janoušek, Josef, additional, Corcobado, Tamara, additional, Milenković, Ivan, additional, Nagy, Zoltán, additional, Csorba, Ildikó, additional, Bakonyi, József, additional, and Brasier, Clive M., additional

Published
2021
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22. Two Novel Endornaviruses Co-infecting a Phytophthora Pathogen of Asparagus officinalis Modulate the Developmental Stages and Fungicide Sensitivities of the Host Oomycete

Author

Uchida, Keiko, primary, Sakuta, Kohei, additional, Ito, Aori, additional, Takahashi, Yumi, additional, Katayama, Yukie, additional, Omatsu, Tsutomu, additional, Mizutani, Tetsuya, additional, Arie, Tsutomu, additional, Komatsu, Ken, additional, Fukuhara, Toshiyuki, additional, Uematsu, Seiji, additional, Okada, Ryo, additional, and Moriyama, Hiromitsu, additional

Published
2021
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24. Phylogeography and population structure of the global, wide host-range hybrid pathogen Phytophthora× cambivora

Author

Mullett, Martin S., Van Poucke, Kris, Haegeman, Annelies, Focquet, Fran, Cauldron, Nicholas C., Knaus, Brian J., Horta Jung, Marilia, Kageyama, Koji, Hieno, Ayaka, Masuja, Hayato, Uematsu, Seiji, Webber, Joan F., Brasier, Clive M., Bakonyi, József, Heungens, Kurt, Grünwald, Niklaus J., and Jung, Thomas

Abstract

Invasive, exotic plant pathogens pose a major threat to native and agricultural ecosystems. Phytophthora× cambivorais an invasive, destructive pathogen of forest and fruit trees causing severe damage worldwide to chestnuts (Castanea), apricots, peaches, plums, almonds and cherries (Prunus), apples (Malus), oaks (Quercus), and beech (Fagus). It was one of the first damaging invasive Phytophthoraspecies to be introduced to Europe and North America, although its origin is unknown. We determined its population genetic history in Europe, North and South America, Australia and East Asia (mainly Japan) using genotyping-by-sequencing. Populations in Europe and Australia appear clonal, those in North America are highly clonal yet show some degree of sexual reproduction, and those in East Asia are partially sexual. Two clonal lineages, each of opposite mating type, and a hybrid lineage derived from these two lineages, dominated the populations in Europe and were predominantly found on fagaceous forest hosts (Castanea, Quercus, Fagus). Isolates from fruit trees (Prunusand Malus) belonged to a separate lineage found in Australia, North America, Europe and East Asia, indicating the disease on fruit trees could be caused by a distinct lineage of P.× cambivora, which may potentially be a separate sister species and has likely been moved with live plants.The highest genetic diversity was found in Japan, suggesting that East Asia is the centre of origin of the pathogen. Further surveys in unsampled, temperate regions of East Asia are needed to more precisely identify the location and range of the centre of diversity.

Published
2023
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43. Characterization ofTomato bushy stunt virusnewly isolated from nipplefruit (Solanum mammosum) in Japan.

Author

Ohki, Takehiro, Uematsu, Seiji, Lesemann, Dietrich-Eckhardt, Honda, Yohachiro, Tsuda, Shinya, and Fujisawa, Ichiro

Subjects
TOMATO disease & pest resistance, PLANT viruses, PHYTOPATHOGENIC microorganisms, SOLANUM, GOOSEFOOTS
Abstract

Tomato bushy stunt virus(TBSV) was isolated from nipplefruit (Solanum mammosum) in Chiba Prefecture, Japan, with mosaic symptoms, leaf deformation, and stunting. The genomic structure of the TBSV-nipplefruit strain (TBSV-Nf) is identical to that of the TBSV-cherry strain (TBSV-Ch). Transcripts from its full-length cDNA clone without a cap analog at the 5' terminus infectedNicotiana glutinosa,Nicotiana benthamiana,S. mammosum,Lycopersicon esculentum,Chenopodium amaranticolor, andChenopodium quinoa, which displayed symptoms identical to those of the parental virus. Although TBSV-Ch systemically infected nipplefruit, systemic symptoms caused by TBSV-Nf were more severe than those by TBSV-Ch. This virus is the first TBSV discovered in Japan and the first TBSV ever isolated from nipplefruit. [ABSTRACT FROM AUTHOR]

Published
2005
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44. Phytophthora niederhauseriisp. nov., a polyphagous species associated with ornamentals, fruit trees and native plants in 13 countries

Author

Abad, Z. Gloria, Abad, Jorge A., Cacciola, Santa Olga, Pane, Antonella, Faedda, Roberto, Moralejo, Eduardo, Pérez-Sierra, Ana, Abad-Campos, Paloma, Alvarez-Bernaola, Luis A., Bakonyi, József, Józsa, András, Herrero, Maria Luz, Burgess, Treena I., Cunnington, James H., Smith, Ian W., Balci, Yilmaz, Blomquist, Cheryl, Henricot, Béatrice, Denton, Geoffrey, Spies, Chris, Mcleod, Adele, Belbahri, Lassaad, Cooke, David, Kageyama, Koji, Uematsu, Seiji, Kurbetli, İlker, and Değirmenci, Kemal

Abstract

A non-papillate, heterothallic Phytophthoraspecies first isolated in 2001 and subsequently from symptomatic roots, crowns and stems of 33 plant species in 25 unrelated botanical families from 13 countries is formally described here as a new species. Symptoms on various hosts included crown and stem rot, chlorosis, wilting, leaf blight, cankers and gumming. This species was isolated from Australia, Hungary, Israel, Italy, Japan, the Netherlands, Norway, South Africa, Spain, Taiwan, Turkey, the United Kingdom and United States in association with shrubs and herbaceous ornamentals grown mainly in greenhouses. The most prevalent hosts are English ivy (Hedera helix) and Cistus (Cistus salvifolius). The association of the species with acorn banksia (Banksia prionotes) plants in natural ecosystems in Australia, in affected vineyards (Vitis vinifera) in South Africa and almond (Prunus dulcis) trees in Spain and Turkey in addition to infection of shrubs and herbaceous ornamentals in a broad range of unrelated families are a sign of a wide ecological adaptation of the species and its potential threat to agricultural and natural ecosystems. The morphology of the persistent non-papillate ellipsoid sporangia, unique toruloid lobate hyphal swellings and amphigynous antheridia does not match any of the described species. Phylogenetic analysis based on sequences of the ITS rDNA, EF-1α, and β-tubsupported that this organism is a hitherto unknown species. It is closely related to species in ITS clade 7b with the most closely related species being P. sojae. The name Phytophthora niederhauseriihas been used in previous studies without the formal description of the holotype. This name is validated in this manuscript with the formal description of Phytophthora niederhauseriiZ.G. Abad et J.A. Abad, sp. nov. The name is coined to honor Dr John S. Niederhauser, a notable plant pathologist and the 1990 World Food Prize laureate.

Published
2014
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45. Changes in spatial distribution pattern during the larval stage of the fall webworm, Hyphantria cuneadrury (Lepidoptera: Arctiidae)

Author

Suzuki, Nobuhiko, Kunimi, Yasuhisa, Uematsu, Seiji, and Kobayashi, Ken'ichi

Abstract

The changes in spatial distribution pattern during larval stage of the fall webworm, Hyphantria cuneawere quantitatively investigated in the field experimental populations. The female adult deposits eggs as a cluster and the hatchlings make a compact colonial-web. In this period, the all-or-none type mortality which is characteristic in gregarious insect species was occasionary recognized before spinning a compact colonial-web. Once making a compact colonial-web, the larvae feed the leaves in the colonial-web up to about 5th instar. In this period, the movement of larvae occurred due to the local food shortage in a colonial-web and the expansion of colonial-web. As the larvae developed, the colonial-web was separated into several small groups. These larvae began to disperse about 5th instar. In this period, the local food shortage seems to be an important trigger for the larval dispersal. The mean concentration of larvae on leaves abruptly decreased, and finally the larvae became solitary at the 6th or 7th instars. The dispersal process in later larval stage is not necessarily due to the complete food shortage. The dispersal prior to the occurrence of food shortage may be a safety mechanism to protect the larvae from the food shortage.

Published
1980
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46. Erwinia carotovora subsp. carotovoraによるホワイトレースフラワー軟腐病(新称)の発生について

Author

Kazuo, Kanehashi, Ebihara Yoshiyuki, Uematsu Seiji, Negishi Hiromitsu, Matsuyama Nobuaki, and Suyama Kazuo

Subjects
軟腐病, Erwinia carotovora subsp. carotovora, White lace flower, Soft rot, ホワイトレースフラワー
Abstract

2001年10月,千葉県安房郡丸山町でホワイトレースフラワーの茎および葉柄が軟化腐敗し,悪臭を放つ病害の発生を認めた。本病罹病株から分離した細菌は,ホワイトレースフラワー苗を軟化腐敗させた。分離細菌は,グラム反応陰性,通性嫌気性,37℃で発育し,グルコースを発酵的に分解,硝酸塩を還元,ラクトースを利用し酸を産生したが,インドールを産生せず,酒石酸の利用は認めなかった。以上の結果から,本分離細菌をErwinia carotovora subsp. carotovoraと同定し,病名をホワイトレースフラワー軟腐病(英名 ; soft rot)とすることを提案する。, On October in 2001, a new rotting disease was found on white lace flower (Ammi majus L.) in Chiba prefecture, Japan. The diseased plant primarily showed water-soaked brown spots on the stem, petioles and leaves near the soil. The diseased tissues were rotten with peculiar odor and the whole of the plant finally wilted. Bacteria isolated from rotten tissues and isolated bacteria produced rotten symptoms on the white lace flower, chinese cabbage and cucumber plants by artificial inoculation. The causal bacterium was identified as Erwinia carotovora subsp. carotovora (Jones) BERGEY et.al. 1923 according to its pathogenicity and bacteriological characteristics. Bacterial disease of white lace flower has not been recorded in Japan, therefore we proposed the name "soft rot" for this disease.

47. Pseudomonas cichorii (Swingle1925) Stapp1928によるメボウキ黒斑細菌病(新称)について

Author

Kazuo, Kanehashi, Ebihara Yoshiyuki, Uematsu Seiji, Negishi Hiromitsu, Matsuyama Nobuaki, and Suyama Kazuo

Subjects
Bacterial black spot, Basil, 黒斑細菌病, Pseudomonas cichorii, メボウキ
Abstract

2003年10月千葉県千倉町のビニルハウス栽培メボウキの葉,葉柄および茎に黒色水浸状斑および黒色条斑を形成し,ついには枯死する病害の発生を認めた。被害部からは細菌のみが分離され,分離菌はその病原性,細菌学的性質,血清学的性質からPseudomonas cichorii(Swingle1925)Stapp1928と同定された。P. cichoriiによるメボウキの病害は,わが国未報告であることから,病名を黒斑細菌病(英名 ; Bacterial black spot)とすることを提案した。, In October, 2003, a new bacterial black spot disease was found on basil (Ocimum basilicum L.) in Chiba prefecture, Japan. This disease was characterized by the formation of irregular shaped brownish-black spots or streaks on the leaves, petioles and stems. Bacteria isolated from disease tissues produced black spots and streaks similar to natural infection on the basil by spray inoculation method. The causal bacterium was identified as Pseudomonas cichorii (Swingle 1925) Stapp1928 based on pathogenicity, bacteriological and serological characteristics. Bacterial disease of basil caused by P. cichorii has not been recorded in Japan. Therefore, we proposed the name "bacterial black spot" for this disease.

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