2026-03-09T07:41:03Z https://kanazawa-u.repo.nii.ac.jp/oai

oai:kanazawa-u.repo.nii.ac.jp:00028422 2024-06-25T07:34:20Z 4200:1874:1875

Fusarium phytotoxin trichothecenes have an elicitor-like activity in Arabidopsis thaliana, but the activity differed significantly among their molecular species 西内, 巧 山口, 和男 20334790 Nishiuchi, Takumi Masuda, Daisuke Nakashita, Hideo Ichimura, Kazuya Shinozaki, Kazuo Yoshida, Shigeo Kimura, Makoto Yamaguchi, Isamu 00019879 Yamaguchi, Kazuo © 2006 The American Phytopathological Society Phytopathogenic fungi such as Fusarium spp. synthesize trichothecene family phytotoxins. Although the type B trichothecene, deoxynivalenol (DON), is thought to be a virulence factor allowing infection of plants by their trichothecene-producing Fusarium spp., little is known about effects of trichothecenes on the defense response in host plants. Therefore, in this article, we investigated these effects of various trichothecenes in Fusarium-susceptible Arabidopsis thaliana. Necrotic lesions were observed in Arabidopsis leaves infiltrated by 1 μM type A trichothecenes such as T-2 toxin. Trichothecene-induced lesions exhibited dead cells, callose deposition, generation of hydrogen peroxide, and accumulation of salicylic acids. Moreover, infiltration by trichothecenes caused rapid and prolonged activation of two mitogen-activated protein kinases and induced expression of both PR-1 and PDF1.2 genes. Thus, type A trichothecenes trigger the cell death by activation of an elicitor-like signaling pathway in Arabidopsis. Although DON did not have such an activity even at 10 μM, translational inhibition by DON was observed at concentrations above 5 μM. These results suggested that DON is capable of inhibiting translation in Arabidopsis cells without induction of the elicitor-like signaling pathway. © 2006 The American Phytopathological Society.. 金沢大学疾患モデル総合研究センター / 金沢大学学際科学実験センター遺伝子研究施設 American Phytopathological Society 2006-05-01 2017-10-05 eng journal article VoR https://doi.org/10.24517/00028409 http://hdl.handle.net/2297/14524 https://kanazawa-u.repo.nii.ac.jp/records/28422 10.24517/00028409 10.1094/MPMI-19-0512 http://apsjournals.apsnet.org/doi/abs/10.1094/MPMI-19-0512 http://dx.doi.org/10.1094/MPMI-19-0512 AA10671675 0894-0282 Molecular Plant-Microbe Interactions 19 5 512 520 https://kanazawa-u.repo.nii.ac.jp/record/28422/files/SS-NISHIUCHI-T-512.pdf application/pdf 533.2 kB 2017-10-05