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ONSEN shows different transposition activities in RdDM pathway mutants

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Title: ONSEN shows different transposition activities in RdDM pathway mutants
Authors: Hayashi, Yui Browse this author
Takehira, Kanako Browse this author
Nozawa, Kosuke Browse this author
Suzuki, Takamasa Browse this author
Masuta, Yukari Browse this author
Kato, Atsushi Browse this author
Ito, Hidetaka Browse this author →KAKEN DB
Keywords: Arabidopsis thaliana
heat stress
Issue Date: Aug-2020
Publisher: 日本遺伝学会(The Genetics Society of Japan)
Journal Title: Genes & Genetic Systems
Volume: 95
Issue: 4
Start Page: 183
End Page: 190
Publisher DOI: 10.1266/ggs.20-00019
Abstract: Most transposable elements (TEs) are tightly regulated by epigenetic mechanisms such as DNA methylation. RNA-directed DNA methylation (RdDM) is a major control mechanism of TE silencing in plants. We analyzed the transposition activity of a heat-responsive retrotransposon, ONSEN, in Arabidopsis thaliana. Transgenerational transposition was observed in RdDM pathway-deficient mutants upon heat stress. The transposition frequency was higher in the mutants of the upstream processes, but lower in the mutants of the downstream steps, of RdDM. The transposition frequency was not associated with the number of extrachromosomal ONSEN copies. Constitutive heterochromatin of interphase nuclei was dispersed upon heat stress. The degree of decondensation was higher in the RdDM mutants than in wild-type plants subjected to heat stress. We discuss the possible role of RdDM in the regulation of ONSEN transposition upon heat stress.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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