Abstract
Medgyesy et al. (1986, Mol. Gen. Genet. 204, 195–198) have described in Nicotiana plumbaginifolia and in an interspecific cross involving N. plumbaginifolia and N. tabacum a procedure for selecting cell lines derived from seedlings carrying paternal chloroplasts by taking advantage of a plastid-encoded mutation which confers resistance to streptomycin. We have extended their demonstration of occasional transmission of chloroplasts through pollen to the case of an intraspecific cross in N. tabacum. The line used as maternal parent, ITB19(sua), displayed a cytoplasmic male sterility due to the presence of a cytoplasm originating from N. suaveolens. The line used as paternal parent, SR1, was fertile and possessed mutant chloroplasts conferring resistance to streptomycin. From cell lines derived from 204 seedlings, three were regenerated into streptomycin-resistant buds. The plants derived from these three clones were male-sterile. Their progeny, after crossing with a wild type tobacco line, XHFD8, was resistant to streptomycin. Tests of resistance of the seedlings to tentoxin and restriction analyses of the chloroplast DNA indicated that two clones still had the maternal chloroplasts and were thus probably new streptomycin-resistant mutants, whereas the third one had acquired the chloroplasts of the paternal parent, but had retained the mitochondria of the maternal parent.
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Abbreviations
- cp-DNA:
-
chloroplast DNA
- mt-DNA:
-
mitochondrial DNA
- Np:
-
Nicotiana plumbaginifolia
- Nt:
-
Nicotiana tabacum
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Communicated by A.M. Boudet
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Horlow, C., Goujaud, J., Lépingle, A. et al. Transmission of paternal chloroplasts in tobacco (Nicotiana tabacum). Plant Cell Reports 9, 249–252 (1990). https://doi.org/10.1007/BF00232294
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DOI: https://doi.org/10.1007/BF00232294