Structural rearrangements of the chloroplast genome provide an important phylogenetic link in ferns

Diana B. Stein; David S. Conant; Mary Ellen Ahearn; Elizabeth T. Jordan; Susan A. Kirch; Mitsuyasu Hasebe; Kunio Iwatsuki; Mui Keng Tan; John A. Thomson

Structural rearrangements of the chloroplast genome provide an important phylogenetic link in ferns

Diana B. Stein, David S. Conant, Mary Ellen Ahearn, Elizabeth T. Jordan, Susan A. Kirch, Mitsuyasu Hasebe, Kunio Iwatsuki, Mui Keng Tan, John A. Thomson

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Abstract

The chloroplast genome of most land plants is highly conserved. In contrast, physical and gene mapping studies have revealed a highly rearranged chloroplast genome in species representing four families of ferns. In all four, there has been a rare duplication of the psbA gene and the order of the psbA, 16S, and 23S rRNA genes has been inverted. Our analysis shows that the described rearrangement results from a minimum of two inversions within the inverted repeat. This chloroplast DNA structure provides unambiguous evidence that phylogenetically links families of ferns once thought to belong to different major evolutionary lineages.

Original language	English (US)
Pages (from-to)	1856-1860
Number of pages	5
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	89
Issue number	5
State	Published - 1992

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T1 - Structural rearrangements of the chloroplast genome provide an important phylogenetic link in ferns

AU - Stein, Diana B.

AU - Conant, David S.

AU - Ahearn, Mary Ellen

AU - Jordan, Elizabeth T.

AU - Kirch, Susan A.

AU - Hasebe, Mitsuyasu

AU - Iwatsuki, Kunio

AU - Tan, Mui Keng

AU - Thomson, John A.

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Y1 - 1992

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AB - The chloroplast genome of most land plants is highly conserved. In contrast, physical and gene mapping studies have revealed a highly rearranged chloroplast genome in species representing four families of ferns. In all four, there has been a rare duplication of the psbA gene and the order of the psbA, 16S, and 23S rRNA genes has been inverted. Our analysis shows that the described rearrangement results from a minimum of two inversions within the inverted repeat. This chloroplast DNA structure provides unambiguous evidence that phylogenetically links families of ferns once thought to belong to different major evolutionary lineages.

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Structural rearrangements of the chloroplast genome provide an important phylogenetic link in ferns

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