IMR Press / FBL / Volume 22 / Issue 6 / DOI: 10.2741/4531

Frontiers in Bioscience-Landmark (FBL) is published by IMR Press from Volume 26 Issue 5 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with Frontiers in Bioscience.

Open Access Review

Plant mitochondrial DNA

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1 Department of Microbiology and Molecular Biology, 4007 LSB, Brigham Young University, Provo, Utah, USA

Academic Editor: Mikhail F Alexeyev

Front. Biosci. (Landmark Ed) 2017, 22(6), 1023–1032; https://doi.org/10.2741/4531
Published: 1 January 2017
(This article belongs to the Special Issue Mitochondrial DNA)
Abstract

Plants possess mitochondrial genomes that are large and complex compared to animals. Nearly all animal mitochondrial genomes are about 16.5. kbp in length, whereas plant mitochondrial genomes range between 200-2,000 kbp. This is curious if we assume modern mitochondria originated from a common alpha-proteobacterial ancestor. Despite their size, plant mitochondrial genomes do not contain significantly more genes than their animal counterparts. Most of the additional DNA found in plant mitochondrial genomes consists of large introns, repeats and non-coding regions. Furthermore, plant mtDNA does not exist as large circular DNA molecules but mostly as a collection of linear DNA with combinations of smaller circular and branched molecules. Studies into these highly fragmented genomes heavily imply that recombination is the main mechanism driving replication of plant mtDNA.

Keywords
Mitochondria
Plant Mitochondrial DNA
Recombination-dependent Replication
RDR
DNA Replication
Mitochondrion Phylogeny
Review
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