Abstract

The experiment was conducted with plantlets of the apple-rootstock MM 106 propagated in vitro. The transpiration of the plantlets was examined and the changes followed by SEM analysis. Data about the transpiration intensity of the acclimatized plants, of its value under different conditions of relative humidity and influenced by the existence of roots, as well as by the degree of acclimatization are presented. Leaves were also examined and it was found that stomata of in vitro developed leaves closed slowly and the number of stomata of newly developed leaves decreased. It was also shown that in vitro propagated roots generally lose their hairs during acclimatization, but these roots are still important because new fully functional roots develop from them.

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