Abstract
The effect of five antibiotics: carbenicillin, chloramphenicol, cefotaxime, kanamycin and hygromycin on the organogenesis from callus cultures of Coryphantha elphantidens (Lem.) Lem. have been studied. Carbenicillin and cefotaxime stimulated shoot regeneration from callus. All antibiotics under study suppressed rooting of in vitro formed shoots. After five sequential subcultures on kanamycin supplemented medium, antibiotic resistant callus was obtained. To study the impact of kanamycin on resistant callus, total protein content was also studied. Selected callus showed a remarkable increase in callus mass. Antibiotic resistant plants have been selected by screening callus pieces on kanamycin supplemented media. Total protein content increased with subsequent subcultures in kanamycin resistant callus. The kanamycin selected shoots withstood the stability test after 2 months on antibiotic free medium. Plants were raised from the callus, which formed roots in 20 mg dm-3 kanamycin, which was under study.
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