Features of the water regime and membrane permeability in species of the genus Quercus L. under conditions of hydrothermal stress
Abstract
The analysis of the dynamics of the parameters of the water regime (water content and real water deficit) in the leaves of four species of the genus Quercus L. during the summer seasons of 2022 and 2023 was carried out. It was revealed that the leaves of Quercus ilex were characterized by the lowest water content. This species, regardless of weather conditions, has a consistently low level of real water scarcity. Under controlled conditions, with various combinations of temperature and humidity, it was found that the leaves of Quercus рubescens have the lowest water retention forces, and their maximum level was detected in Quercus ilex. The boundaries of sublethal water deficiency in the studied species of the genus Quercus were determined: Quercus рubescens - 15-16 %, Quercus robur and Quercus petraea – 20-22 %, and Quercus ilex – 30 %. Data on changes in the permeability of cell membranes under the influence of various combinations of temperature and humidity have been obtained. It has been shown that in conditions close to dry, irreversible cell membrane disorders occur in deciduous species of the genus Quercus against the background of an increase in the rate of dehydration. The change in the intensity of exosmosis in Q. ilex, under such conditions, was poorly expressed, which characterizes its high drought resistance.
About the Authors
Yu. V. Plugatar
Nikitsky Botanical Garden – National Scientific Center of the Russian Academy of Sciences
Russian Federation
Russian Federation
298648; Nikitsky Descent, 52; Republic of Crimea; Yalta; Nikita
R. A. Pilkevich
Nikitsky Botanical Garden – National Scientific Center of the Russian Academy of Sciences
Russian Federation
Russian Federation
298648; Nikitsky Descent, 52; Republic of Crimea; Yalta; Nikita
A. E. Paliy
Nikitsky Botanical Garden – National Scientific Center of the Russian Academy of Sciences
Russian Federation
Russian Federation
298648; Nikitsky Descent, 52; Republic of Crimea; Yalta; Nikita
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Review
For citations:
Plugatar Yu.V., Pilkevich R.A., Paliy A.E. Features of the water regime and membrane permeability in species of the genus Quercus L. under conditions of hydrothermal stress. Plant Biology and Horticulture: theory, innovation. 2024;(4 (173)):7-16. (In Russ.)
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