Meristem‐specific expression of epigenetic regulators safeguards transposon silencing in Arabidopsis. (21st February 2014)

• Record Type: Journal Article
• Authors: Baubec, Tuncay; Finke, Andreas; Mittelsten Scheid, Ortrun; Pecinka, Ales
• Is Part Of: EMBO reports. Volume 15:Number 4(2014:Apr.)
• Page Start: 446
• Page End: 452
• Publication Date: 2014-02-21
• Subjects: Molecular biology -- Periodicals; Molecular Biology -- Periodicals; Molecular biology; Periodicals; 572.8
• DOI: 10.1002/embr.201337915
• Languages: English
• ISSNs: 1469-221X

Abstract

<abstract abstract-type="synopsis" xml:lang="en" id="embr201337915-abs-0002"> <title>Synopsis</title> <p> <boxed-text content-type="graphic" id="embr201337915-blkfxd-0011" position="anchor" orientation="portrait"> <graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pghjsq58dj" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /> </boxed-text> </p> <p>Repetitive DNA sequences are prone to be activated in plant embryonic tissues. Reinforced silencing in the shoot apical meristem is shown here to prevent their expression in post‐embryonic tissues.</p> <p> <list id="embr201337915-list-0001" list-type="bullet"> <list-item> <p>The DNA methylation inhibitor zebularine induces transcriptional activation of repetitive sequences in embryonic, but not post‐embryonic, plant tissues.</p> </list-item> <list-item> <p>RNA‐dependent DNA methylation (RdDM) is required for re‐silencing of these sequences in the shoot apical meristem (SAM).</p> </list-item> <list-item> <p>Abundance of <italic>de novo</italic> and maintenance methylation factors in the SAM secure correct transmission of epigenetic states during vegetative growth.</p> </list-item> </list> </p> </abstract>