Biopolymers and cell. 1997; 13 (5): 362 - 371

Genome variability in plant somatic ceils. 3. Callus formation in vitro

V. A. Kunakh

Literature data on the peculiarities of callus formation in vitro have been reviewed. Both internal and external conditions and factors contributing to cell dedifferentiation were analysed. Predetermining among these processes may be genotype-medium interaction the essential point of which provides presence of the genetic component in plant response, its cells to trauma, and in many cases to exogenic growth regulators. Two principally differing ways for induction of callus formation —- induction of gene expression in the cases when this phenomenon is genetically predetermined and induction of phenocopies for the trait «potential for callus formation» in other cases were examined.