EN
Possible interactions between proteins and nucleic acids which might contribute to general effectivity op plant genetic transformation systems are reviwed. Experimental data concerning direct and A tumefaciens - based plant genetic transformation systems are compared with data obtained from research on nucleocytoplasmic exchange machanisms of biopolmers.In thaht context, mechanisms of hnRNA interactions with hnRNP appear to be of great importance. This type of interactions is determined by conservative nucleic acida bindng domains of many cellular proteins e.g. RGG and RBD.These proteins seem to play an important role in the integration of many other cellular processes.