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Int. J. Mol. Sci. 2018, 19(2), 547; https://doi.org/10.3390/ijms19020547

The Roles of Mitochondrion in Intergenomic Gene Transfer in Plants: A Source and a Pool

1
Laboratory of Cotton Genetics, Genomics and Breeding/Key Laboratory of Crop Heterosis and Utilization of Ministry of Education, College of Agronomy and Biotechnology , China Agricultural University, Beijing 100193, China
2
Institute of Cash Crops, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
*
Author to whom correspondence should be addressed.
Received: 22 December 2017 / Revised: 31 January 2018 / Accepted: 6 February 2018 / Published: 11 February 2018
(This article belongs to the Special Issue Plant Mitochondria)
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Abstract

Intergenomic gene transfer (IGT) is continuous in the evolutionary history of plants. In this field, most studies concentrate on a few related species. Here, we look at IGT from a broader evolutionary perspective, using 24 plants. We discover many IGT events by assessing the data from nuclear, mitochondrial and chloroplast genomes. Thus, we summarize the two roles of the mitochondrion: a source and a pool. That is, the mitochondrion gives massive sequences and integrates nuclear transposons and chloroplast tRNA genes. Though the directions are opposite, lots of likenesses emerge. First, mitochondrial gene transfer is pervasive in all 24 plants. Second, gene transfer is a single event of certain shared ancestors during evolutionary divergence. Third, sequence features of homologies vary for different purposes in the donor and recipient genomes. Finally, small repeats (or micro-homologies) contribute to gene transfer by mediating recombination in the recipient genome. View Full-Text
Keywords: mitochondrion; intergenomic gene transfer; nucleus; chloroplast; genome evolution mitochondrion; intergenomic gene transfer; nucleus; chloroplast; genome evolution
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Zhao, N.; Wang, Y.; Hua, J. The Roles of Mitochondrion in Intergenomic Gene Transfer in Plants: A Source and a Pool. Int. J. Mol. Sci. 2018, 19, 547.

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