Features of physiological and biochemical processes of Prunus armeniaca and Ficus carica in water stress conditions

Abstract

Studies results of drought resistance degree of 4 Ficus carica varieties and 4 Prunus armeniaca varieties are presented. It was established that genotypes of ‘Sary Stambulskiy’ and ‘Sabrucia Rozovaya’ (F. carica), ‘Kazachok’ and ‘Professor Smykov’ (P. armeniaca) are characterized by a high level of adaptation to inadequate water supply. Their leaves show an increased ability to retain moisture in the wilting process and the ability to carry out the fullest possible tissue reparation after critical water loss. The relationship between peroxidase and polyphenol oxidase activity, as well as the concentration of proline with the implementation of protective mechanisms against the negative influence of dehydration was revealed. Characteristics of primary photosynthesis processes in water stress conditions were given. It was found that in F. carica varieties, the rapid fluorescence phase parameters are the most sensitive to dehydration. In P. armeniaca varieties, water stress causes an increase in basic fluorescence and decrease in variable.