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Published Papers 【 display / non-display 】

• Anthracnose and similar symptoms on mango leaves are caused by several other pathogenic fungi, including <i>Colletotrichum</i> spp.

  Taba, S; Harashima, K; Nishihira, M; Maeuejo, H; Sekine, KT

  EUROPEAN JOURNAL OF PLANT PATHOLOGY ( European Journal of Plant Pathology )  169 ( 3 ) 515 - 528   2024.07 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Development and Application of Attenuated Plant Viruses as Biological Control Agents in Japan

  Tomitaka, Y; Shimomoto, Y; Ryang, BS; Hayashi, K; Oki, T; Matsuyama, M; Sekine, KT

  VIRUSES-BASEL ( Viruses )  16 ( 4 )   2024.04 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Identification of a novel viral factor inducing tumorous symptoms by disturbing vascular development in planta.

  Atsumi G, Naramoto S, Nishihara M, Nakatsuka T, Tomita R, Matsushita Y, Hoshi N, Shirakawa A, Kobayashi K, Fukuda H, Sekine KT

  Journal of virology ( Journal of Virology )  97 ( 9 ) e0046323   2023.09 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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  Plant viruses induce various disease symptoms that substantially impact agriculture, but the underlying mechanisms of viral disease in plants are poorly understood. Kobu-sho is a disease in gentian that shows gall formation with ectopic development of lignified cells and vascular tissues such as xylem. Here, we show that a gene fragment of gentian Kobu-sho-associated virus, which is designated as Kobu-sho-inducing factor (KOBU), induces gall formation accompanied by ectopic development of lignified cells and xylem-like tissue in Nicotiana benthamiana. Transgenic gentian expressing KOBU exhibited tumorous symptoms, confirming the gall-forming activity of KOBU. Surprisingly, KOBU expression can also induce differentiation of an additional leaf-like tissue on the abaxial side of veins in normal N. benthamiana and gentian leaves. Transcriptome analysis with Arabidopsis thaliana expressing KOBU revealed that KOBU activates signaling pathways that regulate xylem development. KOBU protein forms granules and plate-like structures and co-localizes with mRNA splicing factors within the nucleus. Our findings suggest that KOBU is a novel pleiotropic virulence factor that stimulates vascular and leaf development.IMPORTANCEWhile various mechanisms determine disease symptoms in plants depending on virus-host combinations, the details of how plant viruses induce symptoms remain largely unknown in most plant species. Kobu-sho is a disease in gentian that shows gall formation with ectopic development of lignified cells and vascular tissues such as xylem. Our findings demonstrate that a gene fragment of gentian Kobu-sho-associated virus (GKaV), which is designated as Kobu-sho-inducing factor, induces the gall formation accompanied by the ectopic development of lignified cells and xylem-like tissue in Nicotiana benthamiana. The molecular mechanism by which gentian Kobu-sho-associated virus induces the Kobu-sho symptoms will provide new insight into not only plant-virus interactions but also the regulatory mechanisms underlying vascular and leaf development.

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• How do emerging long-read sequencing technologies function in transforming the plant pathology research landscape?

  Hamim, I; Sekine, KT; Komatsu, K

  PLANT MOLECULAR BIOLOGY ( Plant Molecular Biology )  110 ( 6 ) 469 - 484   2022.12 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Investigation of sodium nitrite and heat treatment conditions to introduce mutations into the genome of watermelon silver mottle virus

  Tomitaka Yasuhiro, Adachi-Fukunaga Shuhei, Sekine Ken-Taro

  Kyushu Plant Protection Research ( The Association for Plant Protection of Kyushu )  68 ( 0 ) 13 - 21   2022.11

  Type of publication: Research paper (scientific journal)

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Presentations 【 display / non-display 】

• Molecular biological characterization of two strains of cucumber mosaic virus isolated from banana plants in Okinawa.

  Sekine, K.-T., Usami, R., Tomita, R., Takayasu, K., Uchima, J., Taba, S.

  日本微生物生態学会第32回大会；第10回Asian Symposium on Microbial Ecology  (沖縄コンベンションセンター（宜野湾市）)  2018.07  -  2018.07 

Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• Grant-in-Aid for Young Scientists(B)

  Project Year: 2017.04  -  2019.03 

  Direct: 3,400,000 (YEN)  Overheads: 1,020,000 (YEN)  Total: 4,420,000 (YEN)