Changes in the polyphenoloxidase activity in the leaves of Olea europaea during the cold period on the Southern Coast of the Crimea

Abstract

Changes in the polyphenoloxidase activity in the leaves of four cultivars and one subspecies of Olea europaea L. were studied during the cold periods of 2016-2019 years on the Southern Coast of the Crimea. Nikitskaya cultivar was used as a model of high frost resistance, while Correggiolo cultivar and the subspecies O. europaea subsp. cuspidata were models of low frost resistance. It was found out that the polyphenoloxidase activity depends on weather conditions during a particular cold period and it almost independent of the degree of frost resistance of the studied genotypes.