Fruit growing
and viticulture of South Russia

Annotation

In connection with climate change, it is necessary to improve the assortment of grapes adapted to the conditions of the south of Russia. The purpose of the work is to identify physiological and biochemical indicators associated with the formation of protective reactions of various grape varieties to the effect of summer stressors; to identify adaptive varieties for cultivation in the Anapo-Taman zone of the Krasnodar region on the basis of them. Adaptive resistance of grapes to high temperatures was achieved by increasing the content of bound water and proline. It was found that the indicator of the ratio of bound water to free water, which determines the resistance to drought in the varieties Krasnostop AZOS, Kristall, Zarif, is higher than in other studied varieties and was 5.23-5.24 by the end of summer. The varieties Dostoynyi, Krasnostop AZOS, Aligote showed the maximum amounts of proline (52.41-66.14 μg/g raw weight), involved in the implementation of stress-protective mechanisms. Adaptive changes in water-soluble proteins and sugars played a decisive role in the formation of high-temperature stability in summer. A minimal decrease in the content of soluble proteins (by 1.3 times) during the summer was noted in the Dostoynyi and Kristall varieties, indicating their high adaptive ability. The unstable Aligote variety showed a maximum decrease in the content of soluble proteins by the end of summer (3.4 times). The Zarif variety showed the smallest changes in the content of soluble sugars (a decrease of 1.3 times), indicating increased adaptation to arid conditions. It was found that the induction of protective adaptive mechanisms is more pronounced in the varieties Dostoynyi, Krasnostop AZOS, Zarif, which proved to be more adaptive in comparison with other studied varieties in the conditions of the summer period 2019-2020.

Annotation

The frost resistance of the varieties of grape of different ecological and geographical groups and periods of ripening in the natural and simulated conditions is studied. During the period 2006 � 2011 more later entry of the plants of grapes into the state of organic dormancy is established. On the basis of es-timation of the complex of physiological and biochemical indices it is established that the frost resistance of grapes of Euro-AmurAmerican (variety Krystall) and European origin (variety Barhatniy and Cabernets Sovinyon) is caused both by the high stability of the protoplasm of cells to the dehydration and cellular membranes � to the destruction; varieties of Euro-American ori-gin Dostoyniy, Pervenets Magaracha, Caber-net AZOS - the stability of theprotoplasm of cells to the dehydration also of varieties Krasnostop AZOS and Ach Chakrak � by the stability of cellular membranes to the destruction

Annotation

Despite the increase in the average annual temperature observed in recent decades in the Anapo-Taman zone of the Krasnodar region, the problem of winter and frost resistance of grapes remains urgent. The purpose of this work is to reveal the adaptive changes in the metabolism of various grape varieties that arise in response to the climatic conditions of the autumn-winter period, on the basis of physiological and biochemical parameters, to identify resistant varieties. The objects of research are grape varieties of various ecological and geographical origin: Kristall (control) � Euro-Amuro-American origin; Krasnostop AZOS, Dostoynyi � Euro-American origin; Vostorg � Amuro-American origin; Zarif � Eastern European origin; Aligote � Western European origin. It was found that the Krasnostop AZOS variety was distinguished by the greatest decrease in tissue water content (by 10%), as well as an increased content of bound water (48.50% of the total amount) in the middle of winter in comparison with other studied varieties. The lowered temperatures in November contributed to the hydrolysis of starch and its transformation into soluble sugars that protect cells from the formation of ice crystals. In the middle of winter, the starch content in all varieties decreased due to its hydrolysis, and to a greater extent in Dostoynyi varieties (10.38 times), Krasnostop AZOS (9.63 times), Zarif (8.75 times). In addition to soluble sugars, the adaptive resistance of grapes to low temperatures was achieved an increase in the content of anthocyanins in the shoot bark. The maximum increase in anthocyanins (2.69 times) was found in the Krasnostop AZOS variety, indicating their significant role in adaptive processes. It was found that, according to the degree of tissue hydration, the content of bound water, anthocyanins, soluble proteins, and the degree of starch hydrolysis, the Krasnostop AZOS variety showed the greatest potential for resistance to low temperatures in the winter conditions of 2020-2021 in comparison with other studied varieties.

Annotation

The search for an accelerated assessment of the resistance of grape varieties to extremely high temperatures (hyperthermia) is of particular relevance due to the increasing climate instability in the Anapo-Taman viticulture zone. The purpose of this work is to conduct a comparative assessment of the response of grape varieties to artificially induced high-temperature stress (hyperthermia) in terms of peroxidase activity, the content of proline, ascorbic acid, and to identify varieties with increased resistance to high temperatures. The objects of research are grape varieties of various ecological and geographical origin: Kristall (control) � Euro-Amur-American origin; Krasnostop AZOS, Dostoynyi � Euro-American origin; Vostorg � Amur-American origin; Zarif � Eastern origin; Aligote � Western European origin. Studied varieties respond to hyperthermia by stimulating the functioning of the antioxidant system, the protective effect of which is determined both by the activation of peroxidase and by the accumulation of proline, ascorbic acid. It was found that peroxidase played an important role in the suppression of oxidative stress in the variety Dostoynyi � an increase in its activity by 5.09 times; unlike other varieties, in which an increase was noted by 1.08-1.97 times. In other varieties, the maintenance of redox balance is achieved by increasing the content of proline, ascorbic acid. Insufficient peroxidase activity under conditions of hyperthermia in varieties Kristall and Zarif was compensated by an increase in proline content � by 2.65 and 7.64 times, respectively. It was presented that in the varieties Kristall and Dostoynyi, ascorbic acid showed its protective effect along with proline � an increase in its content by 2.31 and 2.66 times, respectively. In the Zarif variety under stress conditions, an increase in ascorbic acid by 8.35 times was observed. It has been established that the varieties Zarif, Dostoynyi, Kristall, unlike other studied varieties, are more resistant to extremely high temperatures in the summer period.

Annotation

In the conditions of the climate change in southern Russia, unpredictable fluctuations in meteorological factors negatively affect the adaptive capacity of the apple tree to the summer stresses. The parameters of the water regime, the pigmental complex, and the area of the leaf blade serve as reliable criteria for the drought resistance of plants. The aim of this work is to study the features of water metabolism, photosynthetic activity of apple trees in the summer period; to identify the most drought-resistant varieties for cultivation in the Krasnodar region. The objects of research were apple varieties of various ecological and geographical origin: Interprase, Florina, Orfey, Idared, Ligol, Prikubanskoe. Physiological and biochemical adaptation of apple varieties to deficit water supply and high temperatures is achieved by increasing the fraction of bound water in the total water content, increasing the proportion of carotenoids in the pigmental composition of the leaf. It was found that by the end of summer, all studied varieties had a decrease in water content in leaf tissues, and to a greater extent in varieties Idared, Ligol, Prikubanskoe � by 12.2-14.2%. The varieties Orfey and Prikubanskoe were distinguished as the most drought-resistant with the ratio of bound and free forms of water 3.0 and 2.8, respectively. The lowest indicators of the ratio of the chlorophylls sum and carotenoids (2.01-2.03) due to an increase in the proportion of carotenoids performing a protective function were found in the varieties Florina, Orfey, Prikubanskoe. The decrease in the area of the leaf blade in response to stress is the least shown in the varieties Orfey, Idared, Prikubanskoe. Apple varieties Orfey and Prikubanskoe proved to be more adaptive in comparison with other studied varieties in the summer of 2020 and are recommended for cultivation in the Krasnodar region.