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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...
Two successive cycles of mature embryo-derived callus culture separated by one cycle of sexual reproduction of R0 regenerated plants were performed using two rice (Oryza sativa L.) cultivars in order to gain information upon the nature of somaclonal variation in this species. Plants regenerated after one cycle of tissue culture exhibited higher variability and lower performances than those of initial...
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