Comparative analysis of the drought tolerance in the evergreen Cotoneaster species
https://doi.org/10.25684/0513-1634-2023-149-166-174
Abstract
The results of the studies of the effect of conditions simulating the pressure of dry hot-windy weather on water-retaining forces, the state of cell membranes and the functioning of the photosynthetic apparatus in leaves of different generations in 3 evergreen Cotoneaster species are presented. It was found that the photosynthetic apparatus resistance to hot winds decreased in the following order: C. glaucophyllus var. serotinus - C. salicifolia - C. franchetii. In C. glaucophyllus var. serotinus and C. salicifolius, the water deficit was low and relatively stable, and its sublethal level was the moisture loss of 12%. The species C. franchetii was characterized by a low water-retaining capacity of leaves combined with an insufficient reparation capacity after critical dehydration. It was found that, regardless of the experiment conditions, the electrolyte yield in the one year leaves was less than in the leaves of the current generation, which is due to the low resistance of young leaves to water deficiency. The integrity of cell membranes in young leaf depended on the leaf formation stage. The highest sensitivity to the hydrothermal stresspressure was demonstrated by the leaf cell membranes in C. glaucophyllus var. serotinus.
About the Authors
T. B. Gubanova
Никитский ботанический сад – Национальный научный центр
Russian Federation
Russian Federation
R. A. Pilkeviсh
Никитский ботанический сад – Национальный научный центр
Russian Federation
Russian Federation
E. A. Melkozerova
Никитский ботанический сад – Национальный научный центр
Russian Federation
Russian Federation
A. E. Paliy
Никитский ботанический сад – Национальный научный центр
Russian Federation
Russian Federation
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Review
For citations:
Gubanova T.B., Pilkeviсh R.A., Melkozerova E.A., Paliy A.E. Comparative analysis of the drought tolerance in the evergreen Cotoneaster species. Bulletin of the State Nikitsky Botanical Gardens. 2023;(149):166-174. (In Russ.) https://doi.org/10.25684/0513-1634-2023-149-166-174
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