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A Stress-Activated Transposon in Arabidopsis Induces Transgenerational Abscisic Acid Insensitivity

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Title: A Stress-Activated Transposon in Arabidopsis Induces Transgenerational Abscisic Acid Insensitivity
Authors: Ito, Hidetaka Browse this author →KAKEN DB
Kim, Jong-Myong Browse this author
Matsunaga, Wataru Browse this author
Saze, Hidetoshi Browse this author
Matsui, Akihiro Browse this author
Endo, Takaho A. Browse this author
Harukawa, Yoshiko Browse this author
Takagi, Hiroki Browse this author
Yaegashi, Hiroki Browse this author
Masuta, Yukari Browse this author
Masuda, Seiji Browse this author
Ishida, Junko Browse this author
Tanaka, Maho Browse this author
Takahashi, Satoshi Browse this author
Morosawa, Taeko Browse this author
Toyoda, Tetsuro Browse this author
Kakutani, Tetsuji Browse this author
Kato, Atsushi Browse this author →KAKEN DB
Seki, Motoaki Browse this author
Issue Date: 16-Mar-2016
Publisher: Nature Publishing Group
Journal Title: Scientific reports
Volume: 6
Start Page: 23181
Publisher DOI: 10.1038/srep23181
Abstract: Transposable elements (TEs), or transposons, play an important role in adaptation. TE insertion can affect host gene function and provides a mechanism for rapid increases in genetic diversity, particularly because many TEs respond to environmental stress. In the current study, we show that the transposition of a heat-activated retrotransposon, ONSEN, generated a mutation in an abscisic acid (ABA) responsive gene, resulting in an ABA-insensitive phenotype in Arabidopsis, suggesting stress tolerance. Our results provide direct evidence that a transposon activated by environmental stress could alter the genome in a potentially positive manner. Furthermore, the ABA-insensitive phenotype was inherited when the transcription was disrupted by an ONSEN insertion, whereas ABA sensitivity was recovered when the effects of ONSEN were masked by IBM2. These results suggest that epigenetic mechanisms in host plants typically buffered the effect of a new insertion, but could selectively "turn on" TEs when stressed.
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)

Submitter: 伊藤 秀臣

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