Physiological and biochemical features of Рrunus аrmeniaca plants under the water stress
Abstract
The results of the research on the water regime, redox enzymes activity, proline concentration and the state of the photosynthetic apparatus parameters in apricot cultivars in the connection with their drought resistance are presented. It has been revealed that the cultivars Nagycorosi Orias and Kazachok demonstrated a high degree of drought resistance. The cultivar “Krymsky Amur” was characterized by consistently low drought resistance. In all the studied cultivars, an increase in the proline concentration in leaves was observed during the wilting process, and a decrease was noted when the water supply was restored. Changes in polyphenoloxidase activity were cultivar-specific. During the period of maximum probability of drought on the Southern Coast of the Crimea (July-August), under the dehydration process, peroxidase activity increased in resistant cultivars, while in the low resistant cultivar “Kazachok” and the cultivar with labile resistance “Khurmai” it decreased.
It was found out that the development of water deficiency was the cause of a reversible decrease in the maximum and variable fluorescence in the cultivars “Khurmai” and “Nagycorosi Orias”. In the cultivar with low resistance, irreversible inactivation of photosynthesis was recorded during the restoration of turgidity. It was concluded that it is possible to use the chlorophyll fluorescence induction (CFI) method for objective diagnostics of apricot plants' drought resistance under the conditions of the Southern Coast of the Crimea.
About the Authors
T. B. Gubanova
Никитский ботанический сад – Национальный научный центр
Russian Federation
Russian Federation
R. A. Pilkevich
Никитский ботанический сад – Национальный научный центр
Russian Federation
Russian Federation
I. N. Paliy
Никитский ботанический сад – Национальный научный центр
Russian Federation
Russian Federation
А. E. Paliy
Никитский ботанический сад – Национальный научный центр
Russian Federation
Russian Federation
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Review
For citations:
Gubanova T.B., Pilkevich R.A., Paliy I.N., Paliy А.E. Physiological and biochemical features of Рrunus аrmeniaca plants under the water stress. Plant Biology and Horticulture: theory, innovation. 2024;(2 (171)):7-21. (In Russ.)
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