Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Epigenetic Regulation of A Heat-Activated Retrotransposon in Cruciferous Vegetables

Kosuke Nozawa
,
Yuki Kawagishi
,
Akira Kawabe
ORCID logo ,
Mio Sato
,
Yukari Masuta
,
Atsushi Kato
,
Hidetaka Ito
*
Version 1 : Received: 1 May 2017 / Approved: 2 May 2017 / Online: 2 May 2017 (04:58:58 CEST)

A peer-reviewed article of this Preprint also exists.

Nozawa, K.; Kawagishi, Y.; Kawabe, A.; Sato, M.; Masuta, Y.; Kato, A.; Ito, H. Epigenetic Regulation of a Heat-Activated Retrotransposon in Cruciferous Vegetables. Epigenomes 2017, 1, 7, doi:10.3390/epigenomes1010007. Nozawa, K.; Kawagishi, Y.; Kawabe, A.; Sato, M.; Masuta, Y.; Kato, A.; Ito, H. Epigenetic Regulation of a Heat-Activated Retrotransposon in Cruciferous Vegetables. Epigenomes 2017, 1, 7, doi:10.3390/epigenomes1010007.

Abstract

Transposable elements (TEs) are highly abundant in plant genomes. Environmental stress is one of the critical stimuli that activate TEs. We analyzed a heat-activated retrotransposon named ONSEN in cruciferous vegetables. The multiple copies of ONSEN-like elements (OLEs) were found in all the cruciferous vegetables that were analyzed. The copy number of OLE was abundant in Brassica oleracea, which includes cabbage, cauliflower, broccoli, Brussels sprout, and kale. Phylogenic analysis demonstrated that some OLEs transposed after the allopolyploidization of parental Brassica species. Furthermore, we found that the increasing number of OLEs in B. oleracea appeared to be induced transpositional silencing by epigenetic regulation, including DNA methylation. The results of this study would be relevant to the understanding of evolutionary adaptations to thermal environmental stress in different species.

Keywords

heat stress; cruciferae; ONSEN; retrotransposon

Subject

Biology and Life Sciences, Biochemistry and Molecular Biology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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