Galili, S., Department of Plant Genetics, Weizmann Institute of Science, Rehovot, 76100, Israel
Fromm, H., Department of Plant Genetics, Weizmann Institute of Science, Rehovot, 76100, Israel
Aviv, D., Department of Plant Genetics, Weizmann Institute of Science, Rehovot, 76100, Israel
Edelman, M., Department of Plant Genetics, Weizmann Institute of Science, Rehovot, 76100, Israel
Galun, E., Department of Plant Genetics, Weizmann Institute of Science, Rehovot, 76100, Israel

A streptomycin resistant Nicotiana plastome mutant, X/strR6, was subjected to molecular analysis. In this mutant, a single nucleotide transition, C » T, in the chloroplast gene for ribosomal protein S12 alters codon 90 from proline to serine while the nucleotide sequence of the chloroplast 16 S rRNA gene is identical to that of the wild type. Mutant X/strR6 thus differs from several previously reported streptomycin resistant chloroplast mutants which are altered in the gene for 16 S rRNA. © 1989 Springer-Verlag.