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

Jo Ann Banks; Tomoaki Nishiyama; Mitsuyasu Hasabe; Jesper Harholt; Bent L Petersen; Iben Sørensen; Peter Ulvskov; William George Tycho Willats

doi:10.1126/science.1203810

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

Jo Ann Banks, Tomoaki Nishiyama, Mitsuyasu Hasabe, Jesper Harholt, Bent L Petersen, Iben Sørensen, Peter Ulvskov, William George Tycho Willats

552 Citationer (Scopus)

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. We report here the genome sequence of the lycophyte Selaginella moellendorffii (Selaginella), the first nonseed vascular plant genome reported. By comparing gene content in evolutionarily diverse taxa, we found that the transition from a gametophyte- to a sporophyte-dominated life cycle required far fewer new genes than the transition from a nonseed vascular to a flowering plant, whereas secondary metabolic genes expanded extensively and in parallel in the lycophyte and angiosperm lineages. Selaginella differs in posttranscriptional gene regulation, including small RNA regulation of repetitive elements, an absence of the trans-acting small interfering RNA pathway, and extensive RNA editing of organellar genes.

Originalsprog	Engelsk
Tidsskrift	Science
Vol/bind	332
Udgave nummer	6032
Sider (fra-til)	960-963
Antal sider	4
ISSN	0036-8075
DOI	https://doi.org/10.1126/science.1203810
Status	Udgivet - 20 maj 2011

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10.1126/science.1203810

Citationsformater

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AU - Banks, Jo Ann

AU - Nishiyama, Tomoaki

AU - Hasabe, Mitsuyasu

AU - Harholt, Jesper

AU - Petersen, Bent L

AU - Sørensen, Iben

AU - Ulvskov, Peter

AU - Willats, William George Tycho

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N2 - 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. We report here the genome sequence of the lycophyte Selaginella moellendorffii (Selaginella), the first nonseed vascular plant genome reported. By comparing gene content in evolutionarily diverse taxa, we found that the transition from a gametophyte- to a sporophyte-dominated life cycle required far fewer new genes than the transition from a nonseed vascular to a flowering plant, whereas secondary metabolic genes expanded extensively and in parallel in the lycophyte and angiosperm lineages. Selaginella differs in posttranscriptional gene regulation, including small RNA regulation of repetitive elements, an absence of the trans-acting small interfering RNA pathway, and extensive RNA editing of organellar genes.

AB - 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. We report here the genome sequence of the lycophyte Selaginella moellendorffii (Selaginella), the first nonseed vascular plant genome reported. By comparing gene content in evolutionarily diverse taxa, we found that the transition from a gametophyte- to a sporophyte-dominated life cycle required far fewer new genes than the transition from a nonseed vascular to a flowering plant, whereas secondary metabolic genes expanded extensively and in parallel in the lycophyte and angiosperm lineages. Selaginella differs in posttranscriptional gene regulation, including small RNA regulation of repetitive elements, an absence of the trans-acting small interfering RNA pathway, and extensive RNA editing of organellar genes.

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ER -

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

Abstract

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