Many independent origins of trans splicing of a plant mitochondrial group II intron

Journal of Molecular Evolution
Yin-Long Qiu, Jeffrey D Palmer

Abstract

We examined the cis- vs. trans-splicing status of the mitochondrial group II intron nad1i728 in 439 species (427 genera) of land plants, using both Southern hybridization results (for 416 species) and intron sequence data from the literature. A total of 164 species (157 genera), all angiosperms, was found to have a trans-spliced form of the intron. Using a multigene land plant phylogeny, we infer that the intron underwent a transition from cis to trans splicing 15 times among the sampled angiosperms. In 10 cases, the intron was fractured between its 5' end and the intron-encoded matR gene, while in the other 5 cases the fracture occurred between matR and the 3' end of the intron. The 15 intron fractures took place at different time depths during the evolution of angiosperms, with those in Nymphaeales, Austrobaileyales, Chloranthaceae, and eumonocots occurring early in angiosperm evolution and those in Syringodium filiforme, Hydrocharis morsus- ranae, Najas, and Erodium relatively recently. The trans-splicing events uncovered in Austrobaileyales, eumonocots, Polygonales, Caryophyllales, Sapindales, and core Rosales reinforce the naturalness of these major clades of angiosperms, some of which have been identified solely on the ba...Continue Reading

Citations

Jun 10, 2004·Molecular Phylogenetics and Evolution·Olena Dombrovska, Yin-Long Qiu
Jan 29, 2013·Nature·Wojciech P GalejKiyoshi Nagai
Dec 1, 2010·Proceedings of the National Academy of Sciences of the United States of America·Weilong HaoJeffrey D Palmer
Mar 29, 2007·Nucleic Acids Research·Kamila BelhocineBenoit Cousineau
Nov 19, 2009·Nucleic Acids Research·Helen Elina, Gregory G Brown
May 14, 2010·Cold Spring Harbor Perspectives in Biology·Alan M Lambowitz, Steven Zimmerly
Aug 27, 2021·Molecular Biology and Evolution·Jessica M WarrenDaniel B Sloan

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