Movement of Genetic Information Between Plant Organelles: Mitochondria-Nuclei
The endosymbiont hypothesis for the origin of eukaryotic cells suggests that mitochondria and chloroplasts arose from free-living prokaryotes which entered into, and established a stable symbiotic relationship with, a progenitor eukaryotic cell. Because the majority of mitochondrial and chloroplast proteins are genetically encoded in nuclear DNA (nDNA), the hypothesis predicts that transfer of genes from the two cytoplasmic genomes to the nucleus has occurred. Although this argument has, for the most part, been accepted for many years it is only since 1982 that experiments have provided definitive proof at the molecular level that such a transfer of genes has taken place. DNA sequences that have undergone this movement have been termed “promiscuous” (Ellis, 1982; Farrelly and Butow, 1983).
KeywordsCytoplasmic Male Sterility Plant Transformation Vector Terminal Protein Mitochondrial Chromosome Fertility Element
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