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Regulatory mechanism of a heat-activated retrotransposon by DDR complex in Arabidopsis thaliana

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Title: Regulatory mechanism of a heat-activated retrotransposon by DDR complex in Arabidopsis thaliana
Authors: Niu, Xiaoying Browse this author
Chen, Lu Browse this author
Kato, Atsushi Browse this author →KAKEN DB
Ito, Hidetaka Browse this author →KAKEN DB
Keywords: epigenetics
environmental stress
Arabidopsis thaliana
Issue Date: 21-Dec-2022
Publisher: Frontiers
Journal Title: Frontiers in Plant Science
Volume: 13
Start Page: 1048957
Publisher DOI: 10.3389/fpls.2022.1048957
Abstract: The RNA-directed DNA methylation (RdDM) pathway plays an essential role in the transposon silencing mechanism; the DDR complex, consisting of DRD1, DMS3, and RDM1, is an essential component of the RdDM pathway. ONSEN, identified in Arabidopsis, is a retrotransposon activated by heat stress at 37°C; however, studies on the regulation of ONSEN are limited. In this study, we analyzed the regulation of ONSEN activity by the DDR complex in Arabidopsis. We elucidated that loss of any component of the DDR complex increased ONSEN transcript levels. Transgenerational transposition of ONSEN was observed in the DDR-complex mutants treated with heat stress for 48 h. Furthermore, the DDR complex components DRD1, DMS3, and RDM1 played independent roles in suppressing ONSEN transcription and transposition. Moreover, we found that the duration of heat stress affects ONSEN activity. Therefore, the results of this study provide new insights into the retrotransposon regulatory mechanisms of the DDR complex in the RdDM pathway.
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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