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Corpus Systématique Végétale

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Evolutionary variations in DNA sequences transferred from chloroplast genomes to mitochondrial genomes in the Gramineae

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Springer (journals)
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Mots-clés d'auteur
  • Gramineae
  • DNA transfer
  • Organelle genomes
  • Structural rearrangements
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  • Natsu Watanabe 1,2
  • Mikio Nakazono 1
  • Akira Kanno 3
  • Nobuhiro Tsutsumi 1
  • Atsushi Hirai 1
  • 1) Laboratory of Radiation Genetics, Faculty of Agriculture, The University of Tokyo, 1-1-1 Yayoi, 113, Bunkyo, Tokyo, Japan
  • 2) Graduate Division of Biochemical Regulation, School of Agricultural Sciences, Nagoya University, 464-01, Nagoya, Japan
  • 3) Institute of Genetic Ecology, Tohoku University, 2-1-1 Katahira, Aoba, 980, Sendai, Japan

The transfer of fragments of DNA from chloroplast genomes to mitochondrial genomes is considered to be a general phenomenon in higher plants. In the present study, Southern hybridization, together with amplification by PCR and DNA sequencing techniques, was used to examine the regions homologous to chloroplast rps19 in the mitochondrial genomes of several gramineous plants. In all the mitochondrial DNAs from the gramineous plants examined, except for that from wheat, the transferred fragments of chloroplast DNA were found to be maintained and the same junctions of mitochondrion-specific and chloroplast-like sequences were found at one terminus. This finding indicates that the transfer of the chloroplast sequence occurred in the distant past during the evolution of gramineous plants. Subsequent analysis revealed that the fragments had been variously rearranged among species with respect to the other terminus. Considering the current diversity of this one particular transferred fragment of chloroplast DNA, we propose that chloroplast-derived DNA sequences that have lost their original functions tend to be rearranged during evolution in mitochondrial genomes.

Catégories Science-Metrix
  • 1 - health sciences
  • 2 - biomedical research
  • 3 - microbiology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - psychologie. psychophysiologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Biochemistry, Genetics and Molecular Biology ; 3 - Genetics
  • 1 - Health Sciences ; 2 - Medicine ; 3 - General Medicine
Catégories WoS
  • 1 - science ; 2 - genetics & heredity
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Current Genetics

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