Mitochondrial genome evolution in Alismatales: Size reduction and extensive loss of ribosomal protein genes

Gitte Petersen, Argelia Cuenca, Athanasios Zervas, Gregory T. Ross, Sean W. Graham, Craig F. Barrett, Jerrold I. Davis, Ole Seberg

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    Abstract

    The order Alismatales is a hotspot for evolution of plant mitochondrial genomes characterized by remarkable differences in genome size, substitution rates, RNA editing, retrotranscription, gene loss and intron loss. Here we have sequenced the complete mitogenomes of Zostera marina and Stratiotes aloides, which together with previously sequenced mitogenomes from Butomus and Spirodela, provide new evolutionary evidence of genome size reduction, gene loss and transfer to the nucleus. The Zostera mitogenome includes a large portion of DNA transferred from the plastome, yet it is the smallest known mitogenome from a non-parasitic plant. Using a broad sample of the Alismatales, the evolutionary history of ribosomal protein gene loss is analyzed. In Zostera almost all ribosomal protein genes are lost from the mitogenome, but only some can be found in the nucleus.
    Original languageEnglish
    Article numbere0177606
    JournalP L o S One
    Volume12
    Issue number5
    Number of pages21
    ISSN1932-6203
    DOIs
    Publication statusPublished - 2017

    Bibliographical note

    This is an open access article distributed under the terms of the Creative Commons Attribution License.

    Cite this

    Petersen, G., Cuenca, A., Zervas, A., Ross, G. T., Graham, S. W., Barrett, C. F., Davis, J. I., & Seberg, O. (2017). Mitochondrial genome evolution in Alismatales: Size reduction and extensive loss of ribosomal protein genes. P L o S One, 12(5), [e0177606]. https://doi.org/10.1371/journal.pone.0177606