THE ECOPHYSIOLOGICAL PECULIARITIES OF SOME SPECIES OF THE ACER GENUS FROM THE BOTANICAL GARDEN OF IAŞI

The paper presents the results of the biochemical and physiological studies carried out in 2005, on 8 species of the Acer genus, cultivated in the Botanical Garden of Iasi in order to emphasize the ecophysiological peculiarities of the foliar limb, at the pedoclimatic conditions specific to the area. Two native species (Acer campestre si Acer monspessulanum) and six exotic species (Acer ginnala, A. negundo, A. negundo var. auratum, A. negundo var. variegatum, A.opalus, A. saccharinum) at which the print of the ecological factors is recognized in the main physiological manifestations: photosynthesis, respiration, perspiration, mineral nutrition, was studied. The analysis of the physiological behaviour of the exotic species, as compared to the native ones emphasized the fact that most of them have adapted to the conditions of the temperate climate in our country.