Petersen Gitte, Cuenca Argelia, Zervas Athanasios, Ross Gregory T, Graham Sean W, Barrett Craig F, Davis Jerrold I, Seberg Ole
Natural History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark.
Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada.
PLoS One. 2017 May 17;12(5):e0177606. doi: 10.1371/journal.pone.0177606. eCollection 2017.
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.
泽泻目是植物线粒体基因组进化的一个热点，其特点是基因组大小、替换率、RNA编辑、反转录、基因丢失和内含子丢失存在显著差异。在这里，我们对大叶藻和矮慈姑的完整线粒体基因组进行了测序，它们与之前测序的花蔺属和浮萍属的线粒体基因组一起，为基因组大小减小、基因丢失和向细胞核转移提供了新的进化证据。大叶藻线粒体基因组包含从叶绿体基因组转移来的大部分DNA，但它是已知最小的非寄生植物线粒体基因组。利用泽泻目的广泛样本，分析了核糖体蛋白基因丢失的进化历史。在大叶藻中，几乎所有核糖体蛋白基因都从线粒体基因组中丢失，但只有一些能在细胞核中找到。
