Abstract
Electrophoretic patterns for isocitrate dehydrogenase (IDH; EC 1.1.1.42), acid phosphatase (ACP; EC 3.1.3.2), peroxidase (PER; EC 1.11.1.7), and esterase (EST; EC 3.1.1.1) isozymes were determined inCereus peruvianus tissues and used as markers of genetic uniformity of calli and of the plants regenerated from callus cultures. One IDH, six ACP, six PER, and six EST isozymes were induced in cultured callus tissues in medium containing three 2,4-dichlorophenoxyacetic acid and kinetin combinations. Four ACP, two PER, and three EST isozymes were still present in all regenerated plantsin vitro and therefore can be used as markers of theC. peruvianus plants regenerated from callus tissues. The differential patterns of ACP and IDH isozymes and the similar zymograms for PER and EST isozymes presented by callus tissues were used in a comparison of callus tissues cultured for 2 years. The comparative analysis of zymograms within each enzyme system indicated a mean heterogeneity coefficient of 0.33 forC. peruvianus calli cultured for 2 years. Because of the isozyme variations, which developed in culture medium and were transferred to the regenerated plants, the IDH, ACP, PER, and EST enzyme systems can be considered to be good markers for investigating possible genetic variations in plant populations ofC. peruvianus obtainedin vitro from callus culture.
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Mangolin, C.A., Prioli, A.J. & Machado, M.F.P.S. Isozyme patterns in callus cultures and in plants regenerated from calli ofCereus peruvianus (Cactaceae). Biochem Genet 32, 237–247 (1994). https://doi.org/10.1007/BF00555827
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DOI: https://doi.org/10.1007/BF00555827