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Horizontal gene transfer from a flowering plant to the insular pine Pinus canariensis (Chr. Sm. Ex DC in Buch)
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2015 (English)In: Heredity, ISSN 0018-067X, E-ISSN 1365-2540, Vol. 114, no 4, 413-418 p.Article in journal (Refereed) Published
Abstract [en]

Horizontal gene transfer (HGT) is viewed as very common in the plant mitochondrial (mt) genome, but, to date, only one case of HGT has been found in gymnosperms. Here we report a new case of HGT, in which a mt nad5-1 fragment was transferred from an angiosperm to Pinus canariensis. Quantitative assay and sequence analyses showed that the foreign nad5-1 is located in the mt genome of P. canariensis and is nonfunctional. An extensive survey in the genus Pinus revealed that the angiosperm-derived nad5-1 is restricted to P. canariensis and present across the species' range. Molecular dating based on chloroplast DNA suggested that the HGT event occurred in the late Miocene after P. canariensis split from its closest relatives, and that the foreign copy became fixed in P. canariensis owing to drift during its colonization of the Canary Islands. The mechanism of this HGT is unclear but it was probably achieved through either direct cell-cell contact or external vectors. Our discovery provides evidence for an important role of HGT in plant mt genome evolution.

Place, publisher, year, edition, pages
2015. Vol. 114, no 4, 413-418 p.
National Category
Genetics Evolutionary Biology
Identifiers
URN: urn:nbn:se:umu:diva-102442DOI: 10.1038/hdy.2014.118ISI: 000350882200006PubMedID: 25604946OAI: oai:DiVA.org:umu-102442DiVA: diva2:814892
Available from: 2015-05-28 Created: 2015-04-26 Last updated: 2017-12-04Bibliographically approved

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