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American Association for the Advancement of Science, Science, 6032(332), p. 960-963, 2011

DOI: 10.1126/science.1203810

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The Selaginella genome identifies genetic changes associated with the evolution of vascular plants

Journal article published in 2011 by Jo Ann Banks, Tomoaki Nishiyama, Mitsuyasu Hasebe, John L. Bowman, Michael Gribskov, Claude dePamphilis, C. Depamphilis, Victor A. Albert, Naoki Aono, Tsuyoshi Aoyama, Barbara A. Ambrose, Neil W. Ashton, Michael J. Axtell, Elizabeth Barker, Michael S. Barker and other authors.
This paper is available in a repository.
This paper is available in a repository.

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Abstract

Vascular plants appeared ~410 million years ago then diverged into several lineages of which only two survive: the euphyllophytes (ferns and seed plants) and the lycophytes (1). We report here the genome sequence of the lycophyte Selaginella moellendorffii (Selaginella), the first non-seed vascular plant genome reported. By comparing gene content in evolutionary diverse taxa, we found that the transition from a gametophyte- to sporophyte-dominated life cycle required far fewer new genes than the transition from a non-seed vascular to a flowering plant, while secondary metabolic genes expanded extensively and in parallel in the lycophyte and angiosperm lineages. Selaginella differs in post-transcriptional gene regulation, including small RNA regulation of repetitive elements, an absence of the tasiRNA pathway and extensive RNA editing of organellar genes.