PHYSIOLOGICAL AND BIOCHEMICAL ASPECTS AT APPLE VARIETIES CULTIVATED IN THE NE REGION OF ROMANIA

The article discusses about the variation of a few biochemical and physiological indicators which were performed on the foliar surface (the pigments chlorophyll content, the water content, the dry matter content, the intensity of photosynthesis and respiration process) and about the qualitative indicators of fruits (the total acidity and the concentration of sugar) at three apple varieties: Golden delicious, Idared and Starkrimson, cultivated in the orchard “M rul de aur”, Vaslui county. The investigations were determined in the phase of fruit ripening maturation, 2011. There were used leaves from two cardinal points taking into account the exposition of the trees: east and west. The results indicate functional and biochemical differences depending on each apple variety, geographical exposition of the tree and air humidity during the investigations.