М. Т. Упадышев Under unstable climatic conditions, the resistance of apple trees to high temperatures is an important varietal trait. The aim of the research is to identify heat resistance indicators of different apple varieties in a heat chamber for dry air treatment. The heat treatment of the varieties Antonovka Obyknovennaya, Lobo, Rozhdestvenskoe, Bolotovskoe, Kandil Orlovskiy, Imrus was carried out in a heat chamber at the temperature of +38°С and air humidity of 40% for 90 days. For the heat treatment, 2-year-old apple plants were used. Higher heat resistance was observed in the Lobo variety compared to the other varieties studied. The apple varieties were characterized by medium (Lobo, Rozhdestvenskoe) and high (Bolotovskoe, Imrus, Antonovka Obyknovennaya, Kandil Orlovskiy) water content, high water losses after a simulated heat shock, increased (Kandil Orlovskiy) and high (Bolotovskoe, Imrus, Antonovka Obyknovennaya, Lobo, Rozhdestvenskoe) water deficit, high degree of restoration of leaf water content. The proposed heat resistance coefficient was characterized by a strong degree of association with water loss (r = –0.97) and a moderate degree of association with water content restoration (r = 0.65). Apple plants had a high survival rate after thermotherapy, which was 92.3%.
Научная статья 
показатели жаростойкости