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Type: Journal article
Title: Nuclear genome diversity in somatic cells is accelerated by environmental stress
Author: Wang, D.
Lloyd, A.
Timmis, J.
Citation: Plant Signalling & Behavior, 2012; 7(5):595-597
Publisher: Landes Bioscience
Issue Date: 2012
ISSN: 1559-2316
Statement of
Dong Wang, Andrew H. Lloyd and Jeremy N. Timmis
Abstract: DNA transfer to the nucleus from prokaryotic ancestors of the cytoplasmic organelles (mitochondria and plastids) has occurred during endosymbiotic evolution in eukaryotes. In most eukaryotes, organelle DNA transfer to nucleus is a continuing process. The frequency of DNA transposition from plastid (chloroplast) to nucleus has been measured in tobacco plants (Nicotiana tabacum) experimentally. We have monitored the effects of environmental stress on the rate of DNA transfer from plastid to nucleus by exploiting nucleus-specific reporter genes in two transplastomic tobacco lines. DNA migration from plastids to the nucleus is markedly increased by mild heat stress. In addition, insertions of mitochondrial DNA into induced double-strand breaks are observed after heat treatment. These results show that movement of organelle DNA to the nucleus is remarkably increased by heat stress.
Keywords: DNA transfer; cell division; chloroplast; endosymbiotic evolution; environmental stress; mitochondria
Rights: © 2012 Landes Bioscience.
RMID: 0020120729
DOI: 10.4161/psb.19871
Appears in Collections:Genetics publications

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