The complete chloroplast and mitochondrial genome sequences of Boea hygrometrica: insights into the evolution of plant organellar genomes

The complete nucleotide sequences of the chloroplast (cp) and mitochondrial (mt) genomes of resurrection plant Boea hygrometrica (Bh, Gesneriaceae) have been determined with the lengths of 153,493 bp and 510,519 bp, respectively. The smaller chloroplast genome contains more genes (147) with a 72% co...

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Bibliographic Details
Published in:PloS one 2012-01, Vol.7 (1), p.e30531-e30531
Main Authors: Zhang, Tongwu, Fang, Yongjun, Wang, Xumin, Deng, Xin, Zhang, Xiaowei, Hu, Songnian, Yu, Jun
Format: Article
Language:English
Subjects:
Algorithms
Analysis
Angiosperms
Base Sequence
Biological evolution
Biology
Boea hygrometrica
Chloroplasts
Chloroplasts - genetics
Cycas taitungensis
Evolution
Evolution, Molecular
Evolutionary biology
Gene sequencing
Gene transfer
Gene Transfer, Horizontal
Genes
Genes, Plant
Genetic aspects
Genome, Chloroplast
Genome, Mitochondrial
Genome, Plant - genetics
Genomes
Genomics
Laboratories
Magnoliopsida - genetics
Mitochondria
Models, Genetic
Molecular biology
Molecular Sequence Data
Nucleotide sequence
Olea europaea
Organelles - genetics
Phylogenetics
Plant evolution
Plant genetics
Plastids - genetics
RNA, Transfer - genetics
Sequence Analysis, DNA - methods
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Summary:The complete nucleotide sequences of the chloroplast (cp) and mitochondrial (mt) genomes of resurrection plant Boea hygrometrica (Bh, Gesneriaceae) have been determined with the lengths of 153,493 bp and 510,519 bp, respectively. The smaller chloroplast genome contains more genes (147) with a 72% coding sequence, and the larger mitochondrial genome have less genes (65) with a coding faction of 12%. Similar to other seed plants, the Bh cp genome has a typical quadripartite organization with a conserved gene in each region. The Bh mt genome has three recombinant sequence repeats of 222 bp, 843 bp, and 1474 bp in length, which divide the genome into a single master circle (MC) and four isomeric molecules. Compared to other angiosperms, one remarkable feature of the Bh mt genome is the frequent transfer of genetic material from the cp genome during recent Bh evolution. We also analyzed organellar genome evolution in general regarding genome features as well as compositional dynamics of sequence and gene structure/organization, providing clues for the understanding of the evolution of organellar genomes in plants. The cp-derived sequences including tRNAs found in angiosperm mt genomes support the conclusion that frequent gene transfer events may have begun early in the land plant lineage.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0030531