GrainGenes Reference Report: CUG-26-512
Reference
CUG-26-512
Title
Evolutionary variations in DNA sequences transferred from chloroplast genomes to mitochondrial genomes in the Gramineae
Journal
Current Genetics
Year
1994
Volume
26
Pages
512-518
Author
Watanabe N (2) Nakazono M Kanno A Tsutsumi N Hirai A
Abstract
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.
Keyword
chloroplast genetics
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GrainGenes Reference Report: CUG-26-512
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||