The frost resistance of the interspecies hybrids of the grapes
Under the natural and simulatable conditions (forced dehydration; the temperature of -25 °C) the infl uence of the stress factors of winter period on the physiological processes and the metabolic reactions of the plants of the interspecies hybrids of grapes, resistant to low temperatures are studied. With the use of spectral and electrophoresis methods of studies аre established the optimum ranges of the variation of the parameters of the physiological biochemical indices of the frost resistance (in the state of the deep and forced rest), which allowed types Сrystal, Krasnostop AZOS, Dostoyniy to survive under the extreme winter conditions of the anapo- taman zone. It is established that the studied interspecies hybrids are adapted well on the third, and the type оf Кrasnostop AZOS on the second component of winter hardiness, what is caused by an increase in the water-holding ability of cells and is caused in the type оf Кrasnostop AZOS by an increase in the content of saccharose and proline, in type Сrystal - saccharose and in type Dostoyniy - proline.