Abstract
To identify drought resistance of the studied genotypes of garden roses during the period of maximum probability of drought on the Southern Coast of the Crimea, the water regime, proline concentration, enzyme activity and chlorophyll fluorescence induction parameters under controlled dehydration were studied. Analysis of water regime parameters showed that under conditions of water stress, the best water-holding and recovery capabilities were shown by leaves of cv. ‘Borisfen’ and R. hugonis species. Species R. indica, R. bracteata, R. rouletti, R. foetida showed instability of water regime under conditions imitating dry weather. Studies of changes in biochemical parameters revealed that under relatively mild wilting conditions after removal of stress, metabolic processes are restored in R. hugonis, R. bracteata, R. indica and cv. ‘Borisfen’. Wilting under conditions imitating dry weather does not cause irreversible metabolic disturbances in R. hugonis, R. bracteata, and cv. ‘Borisfen’. Under different wilting conditions, cv. ‘Borisfen’and R. foetida species had relatively stable functioning of FS II. Simulation of dry weather led to irreversible disturbances in the oxygen-releasing complex and thylakoid destruction in R. gallica during the stressor, and in R. indica and R. bracteata species - after recovery of water availability. The highest drought tolerance is in in cv. ‘Borisfen’and R. hugonis sprcies.
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Claims 20
Claim · model-written summary
Borisfen had the best leaf water holding and recovery.
Verbatim
e0“best water-holding and recovery capabilities were shown by leaves of cv. ‘Borisfen’ and R. hugonis species”
t0“garden roses”
Claim · model-written summary
R. hugonis had the best leaf water holding and recovery.
Verbatim
e0“best water-holding and recovery capabilities were shown by leaves of cv. ‘Borisfen’ and R. hugonis species”
Claim · model-written summary
R. indica had unstable water regime under simulated dry weather.
Verbatim
e0“Species R. indica, R. bracteata, R. rouletti, R. foetida showed instability of water regime under conditions imitating dry weather”
Claim · model-written summary
R. bracteata had unstable water regime under simulated dry weather.
Verbatim
e0“Species R. indica, R. bracteata, R. rouletti, R. foetida showed instability of water regime under conditions imitating dry weather”
Claim · model-written summary
R. rouletti had unstable water regime under simulated dry weather.
Verbatim
e0“Species R. indica, R. bracteata, R. rouletti, R. foetida showed instability of water regime under conditions imitating dry weather”
Claim · model-written summary
R. foetida had unstable water regime under simulated dry weather.
Verbatim
e0“Species R. indica, R. bracteata, R. rouletti, R. foetida showed instability of water regime under conditions imitating dry weather”
Claim · model-written summary
Metabolism recovered after mild wilting in R. hugonis.
Verbatim
e0“metabolic processes are restored in R. hugonis, R. bracteata, R. indica and cv. ‘Borisfen’”
Claim · model-written summary
Metabolism recovered after mild wilting in R. bracteata.
Verbatim
e0“metabolic processes are restored in R. hugonis, R. bracteata, R. indica and cv. ‘Borisfen’”
Claim · model-written summary
Metabolism recovered after mild wilting in R. indica.
Verbatim
e0“metabolic processes are restored in R. hugonis, R. bracteata, R. indica and cv. ‘Borisfen’”
Claim · model-written summary
Metabolism recovered after mild wilting in Borisfen.
Verbatim
e0“metabolic processes are restored in R. hugonis, R. bracteata, R. indica and cv. ‘Borisfen’”
t0“garden roses”
Claim · model-written summary
Dry-weather wilting caused no irreversible metabolic disturbances in R. hugonis.
Verbatim
e0“does not cause irreversible metabolic disturbances in R. hugonis, R. bracteata, and cv. ‘Borisfen’”
Claim · model-written summary
Dry-weather wilting caused no irreversible metabolic disturbances in R. bracteata.
Verbatim
e0“does not cause irreversible metabolic disturbances in R. hugonis, R. bracteata, and cv. ‘Borisfen’”
Claim · model-written summary
Dry-weather wilting caused no irreversible metabolic disturbances in Borisfen.
Verbatim
e0“does not cause irreversible metabolic disturbances in R. hugonis, R. bracteata, and cv. ‘Borisfen’”
t0“garden roses”
Claim · model-written summary
Borisfen maintained relatively stable FS II function during wilting.
Verbatim
e0“cv. ‘Borisfen’and R. foetida species had relatively stable functioning of FS II”
t0“garden roses”
Claim · model-written summary
R. foetida maintained relatively stable FS II function during wilting.
Verbatim
e0“cv. ‘Borisfen’and R. foetida species had relatively stable functioning of FS II”
Claim · model-written summary
Simulated dry weather irreversibly disturbed the oxygen releasing complex and thylakoids in R. gallica.
Verbatim
e0“irreversible disturbances in the oxygen-releasing complex and thylakoid destruction in R. gallica during the stressor”
Claim · model-written summary
R. indica showed irreversible oxygen complex and thylakoid damage after water recovery.
Verbatim
e0“in R. indica and R. bracteata species - after recovery of water availability”
Claim · model-written summary
R. bracteata showed irreversible oxygen complex and thylakoid damage after water recovery.
Verbatim
e0“in R. indica and R. bracteata species - after recovery of water availability”
Claim · model-written summary
Borisfen had the highest drought tolerance.
Verbatim
e0“The highest drought tolerance is in in cv. ‘Borisfen’and R. hugonis sprcies”
t0“garden roses”
Claim · model-written summary
R. hugonis had the highest drought tolerance.
Verbatim
e0“The highest drought tolerance is in in cv. ‘Borisfen’and R. hugonis sprcies”