Current Genetics

, Volume 49, Issue 1, pp 47–58

Complete mitochondrial genomes of the three brown algae (Heterokonta: Phaeophyceae) Dictyota dichotoma, Fucus vesiculosus and Desmarestia viridis

  • Marie-Pierre Oudot-Le Secq
  • Susan Loiseaux-de Goër
  • Wytze T. Stam
  • Jeanine L. Olsen
Research Article

DOI: 10.1007/s00294-005-0031-4

Cite this article as:
Secq, MP.OL., Goër, S.L., Stam, W.T. et al. Curr Genet (2006) 49: 47. doi:10.1007/s00294-005-0031-4
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Abstract

We report the complete mitochondrial sequences of three brown algae (Dictyotadichotoma, Fucus vesiculosus and Desmarestia viridis) belonging to three phaeophycean lineages. They have circular mapping organization and contain almost the same set of mitochondrial genes, despite their size differences (31,617, 36,392 and 39,049 bp, respectively). These include the genes for three rRNAs (23S, 16S and 5S), 25–26 tRNAs, 35 known mitochondrial proteins and 3–4 ORFs. This gene set complements two previously studied brown algal mtDNAs, Pylaiella littoralis and Laminaria digitata. Exceptions to the very similar overall organization include the displacement of orfs, tRNA genes and four protein-coding genes found at different locations in the D. dichotoma mitochondrial genome. We present a phylogenetic analysis based on ten concatenated genes (7,479 nucleotides) and 29 taxa. Stramenopiles were always monophyletic with heterotrophic species at the base. Results support both multiple primary and multiple secondary acquisitions of plastids.

Keywords

Brown algae Evolution of mitochondria Stramenopiles Mitochondrial DNA Secondary plastids 

Abbreviation

Mt

Mitochondrial

Supplementary material

294_2005_31_MOESM1_ESM.pdf (585 kb)
Supplementary material

Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Marie-Pierre Oudot-Le Secq
    • 1
    • 3
  • Susan Loiseaux-de Goër
    • 2
  • Wytze T. Stam
    • 1
  • Jeanine L. Olsen
    • 1
  1. 1.Department of Marine Biology, Centre for Ecological and Evolutionary StudiesUniversity of GroningenAA HarenThe Netherlands
  2. 2.Station BiologiqueRoscoff cedexFrance
  3. 3.Department of BotanyUniversity of British ColumbiaVancouverCanada

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