Abstract: It is an object of the present invention to provide a method for editing or modifying plant genomes (a nuclear genome, a plastid genome, and a mitochondrial genome), and in particular, the editing or modification of a single nucleotide. Specifically, the present invention relates to a method for editing genomic DNAs in plant cells, namely, a nuclear genomic DNA, a plastid genomic DNA and a mitochondrial genomic DNA, wherein the method comprises converting target nucleotides on these genomic DNAs to other nucleotides. This conversion is carried out, for example, with cytidine deaminase, and in particular, with the aforementioned enzyme using a double-stranded DNA as a substrate.

Abstract: A method for inducing a structural change in a plant mitochondrial genome is provided. The invention relates to a method for inducing a structural change in a mitochondrial genome in a plant cell by introducing a double-strand break into a target sequence region on mitochondrial genomic DNA in a plant cell, which is present in individual molecule species of the mitochondrial genomic DNA. In addition, the present invention also relates to a method for deleting a gene that is present in mitochondrial genomic DNA in a plant cell by introducing a double-strand break into the gene or a region near the gene, which is present in individual molecule species of the mitochondrial genomic DNA. Moreover, the invention also relates to a plant cell having a mitochondrial genome, in which a structural change has been induced by the method, and a seed and a plant having the plant cell.

Abstract: A method for inducing a structural change in a plant mitochondrial genome is provided. The invention relates to a method for inducing a structural change in a mitochondrial genome in a plant cell by introducing a double-strand break into a target sequence region on mitochondrial genomic DNA in a plant cell, which is present in individual molecule species of the mitochondrial genomic DNA. In addition, the present invention also relates to a method for deleting a gene that is present in mitochondrial genomic DNA in a plant cell by introducing a double-strand break into the gene or a region near the gene, which is present in individual molecule species of the mitochondrial genomic DNA. Moreover, the invention also relates to a plant cell having a mitochondrial genome, in which a structural change has been induced by the method, and a seed and a plant having the plant cell.