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Updated: Aug 19, 2026

Visual and Microscopic Evaluation of Streptomyces Developmental Mutants
Published on: September 12, 2018
Induction and characterization of streptomycin-resistant mutants in Capsicum praetermissum
Peddaboina Venkataiah1, Thamidala Christopher, Karampuri Subhash
1Plant Biotechnology Laboratory, Department of Botany, Kakatiya University, Warangal-506 009 A P, India. peddaboina@hotmail.com
Abstract:
Streptomycin-resistant mutants were isolated from mutagenised cotyledon explants of Capsicum praetermissum Heiser & Smith. The explants were mutagenised with N-ethyl-N-nitrosourea, which resulted in a high frequency of streptomycin-resistant mutants (18.0%) and a low frequency of chlorophyll-deficient (albino) mutants (8.0%). Complete streptomycin-resistant plantlets were obtained after rooting of the regenerated green shoots on rooting medium containing 1.0 mg L-1 IAA and 500 mg L-1 streptomycin sulphate. Leaf-segment assay of these plantlets revealed that they were resistant to streptomycin but sensitive to chloramphenicol, kanamycin, lincomycin, and spectinomycin. Reciprocal crosses between streptomycin-resistant and -sensitive plants showed a non-Mendelian transmission of resistance by female parents.
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