Summary
A light sensitive mutant was used as a recipient in the transfer of chloroplasts from a wildtype donor. Gamma irradiated (lethal dose) mesophyll protoplasts of Nicotiana gossei were fused with mesophyll protoplasts of a N. plumbaginifolia line carrying light sensitive plastids from a N. tabacum mutant. After fusion, colonies containing wild-type plastids from the cytoplasm donor were selected by their green colour. Most of the regenerated plants had N. plumbaginifolia morphology, but were a normal green in colour. The presence of donor-type plastids was confirmed by the restriction pattern of chloroplast DNA in each plant analysed. These cybrids were fully male sterile with an altered flower morphology typical of certain types of alloplasmic male sterility in Nicotiana. The use of the cytoplasmic light sensitive recipient proved to be suitable for effective interspecific transfer of wild-type chloroplasts. The recombinant-type mitochondrial DNA restriction patterns and the male sterility of the cybrids indicated the co-transfer of chloroplast and mitochondrial traits.
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Communicated by R. Hagemann
On leave from: Department of Genetics, Section of Biosciences, Martin Luther University, Domplatz 1, DDR-4020 Halle/ S., German Democratic Republic
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Medgyesy, P., Golling, R. & Nagy, F. A light sensitive recipient for the effective transfer of chloroplast and mitochondrial traits by protoplast fusion in Nicotiana . Theoret. Appl. Genetics 70, 590–594 (1985). https://doi.org/10.1007/BF00252283
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DOI: https://doi.org/10.1007/BF00252283