The influence of hydrothermal stress on the functional state of the photosynthetic apparatus in species and cultivars of the genus Rosa L. resistance
Abstract
The identification of stress-resistant ornamental crops is an urgent task in the context of climate aridization.
The main objective of this work was to evaluate the response of the photosynthetic apparatus in garden roses to hydrothermal stress in order to identify informative diagnostic parameters.
Using the OJIP-test method, changes in six genotypes were studied under water deficit (22-25 %) induced by combinations of air temperature (40°C) and humidity (25 % and 70 %). It was shown that the response to stress is specific for different species and cultivars and is also related to the conditions of stress exposure. Based on the analysis of fluorescence kinetics and calculated JIP-test parameters, the most sensitive (Rosa roxburhii Tratt.) and resistant (Rosa × odorata (Andrews) Sweet., Rosa lucieae Franch. & Rochebr. ex Crép., ‘Solnechnaya Dolina’) genotypes were identified. It was found that low air humidity causes more significant damage to the oxygen-evolving complex, while high humidity primarily disrupts electron transport. The ABS/RC index was established to be a highly informative indicator for assessing stress resistance.
Supporting agencies: The work was carried out within the framework of the state assignment of the Federal State Budgetary Institution of Science "NBS-NNTS" No. FNNS-2025-0002 and (FNNS-2025-0004)
About the Authors
T. B. Gubanova
Nikitsky Botanical Garden – National Scientific Center
Russian Federation
Russian Federation
298648; Nikitsky descent, 52; Republic of Crimea; Yalta; Nikita
S. A. Plugatar
State Autonomous Institution of Culture of the Republic of Crimea Alupka Palace and Park Museum-Reserve
Russian Federation
Russian Federation
298676; 18 Dvortsovoe Shosse; Alupka
V. V. Titov
Nikitsky Botanical Garden – National Scientific Center
Russian Federation
Russian Federation
298648; Nikitsky descent, 52; Republic of Crimea; Yalta; Nikita
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Review
For citations:
Gubanova T.B., Plugatar S.A., Titov V.V. The influence of hydrothermal stress on the functional state of the photosynthetic apparatus in species and cultivars of the genus Rosa L. resistance. Plant Biology and Horticulture: theory, innovation. 2025;(4 (177)):86-96. (In Russ.)
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