MECHANISMS OF ADAPTATION OF AN APPLE-TREE VARIETIES OF VARIOUS ORIGIN TO ABIOTIC FACTORS OF THE SUMMER PERIOD
The questions of adaptation ways of apple-tree varieties of different ecological and geographical origin and different ploidy to the conditions of the South of Russia are considered. It is revealed, that the apple varieties of domestic breeding have the large reserve of the potential possibilities to adapt to the drought in comparison with the introduced varieties of the foreign breeding. It is shown that adaptation of plants is reached by means of physiological-biochemical and anatomical-morphological mechanisms, as well as manifestation the xeromorphic traits of leaf plate.