Determination of the content of green pigments in the leaves allowed us to establish the adaptive potential of the investigated columnar varieties in comparison with the common conventional varieties. The results of the study of the complex of physiological indices of leaves in order to determine the level of adaptability of seven columnar varieties and three varieties of common apple. It was found that the content of Chla varies from 5.05 to 8.09 mg/g of raw weight, the content of Chlb in the leaves of the studied apple varieties varies from 1.74 to 3.27 mg/g of raw weight. The lowest Chlb content is characterized by leaves of the Favorite variety; the highest is Tantsivnytsia and Sparta. The sum of chlorophylls a and b of the individual varieties in the leaves varies from 6.69 to 11.17 mg/g of crude mass. The highest Chla / Chlb ratio and, accordingly, the lowest adaptability to changes in lighting conditions, are characterized by plants of the Bilosnizhka variety; in the leaves of this variety, the amount of Chla exceeded the content of Chlb 3.03 times. In the leaves of the Sparta and Tantsivnytsia varieties, this ratio was 2.48-2.55, which indicates the best adaptive properties of these varieties under the conditions of the study area. In the autumn variety group, the best adaptive potential was observed in the traditional Teremok variety, in the winter group Chla: Chlb only in Bilosnizhka was significantly lower than Idared, other columnar varieties were at the level of conditional control of this indicator. There are no differences in adaptive potential between summer varieties. With a favorable combination of agro-ecological factors, the columnar varieties retain photosynthetic potential on different age rings. The leaves of the Idared variety placed on the shoot elongation showed the highest intensity of the photosynthetic apparatus according to the ratio F680γt / F680βt. In the same variety in the leaves on the three-year rings there is a decrease in the intensity of photosynthesis by 25%, by six-year to 45%. The leaves of all age sections of the Tantsivnytsia trunk are characterized by the same ratio of amplitudes of thermally induced waves. In leaves of 16-year-old buds, the intensity of photosynthesis is higher than one-year-olds by 17%. In general, the investigated columnar varieties show a high intensity of photosynthesis in the leaves
columnar apple-tree; photo- and thermal induction of chlorophyll; adaptability; chlorophyll; photosynthesis