PHYSIOLOGICAL AND BIOCHEMICAL STUDY OF GRAPEVINE WINTER RESISTANCE

Abstract

In the unstable conditions of the Anapo-Taman zone of the Krasnodar Kray, the issues of grape resistance to low tempera-tures in the winter period are of particular relevance. The results of a physiological and biochemical assessment of the winter hardiness of grape varieties (interspecific hybrids) of various ecological and geo-graphical origin are presented: Kristall (control – Euro-Amur-American origin; Dostoyny, Krasnostop AZOS – Euro-American origin; Vostorg – Amur-American origin; Aligote – Western-European origin, Zarif – East European origin. The studies were carried out on the basis of the ampelographic collection of the "North Caucasian Federal Scientific Center for Horticulture, Viticulture, Winemaking" (NCFSCHVW), located in the city of Anapa. Differences in the water content of the buds, the content starch, soluble sugars, proline, associated with the formation of a protective response to the meteorological conditions of the autumn-winter period 2020–2022. According to the degree of decrease in water content of the buds, the degree of starch hydrolysis, the dynamics of the accumulation of water soluble sugars in response to low temperatures in the win-ter period varieties Kristall, Krasnostop AZOS, Vostorg showed the greatest po-tential for resistance to low temperatures in the autumn-winter period of 2020–2022 compared to other varieties studied. Varie-ties Kristall, Krasnostop AZOS, Vostorg are recommended for cultivation in the Anapo-Taman zone of the Krasnodar Kray and for breeding purposes as sources of winter hardiness.