Z. Е. Ozherelieva, A. O. Bolgova
Russian Research Institute of Fruit Crop Breeding (VNIISPK), Zhilina village, Oryol region, Russia
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Volume 25 No. 2
Date of paper submission: 12.07.2024, date of review: 12.10.2024, date of acceptance: 08.11.2024.
Published: 02/28/2025
Abstract. The purpose of this research was to identify drought-resistant plum varieties based on the investigation of water regime indicators in plum varieties of different genetic origins. Methods. Drought resistance was studied using the dehydration method. Results. The conducted research revealed that meteorological conditions had a significant impact on the annual and monthly dynamics of the leaf water content in plum varieties. In the drier year of 2023, the leaf water content of the studied plum varieties was 8.2 % lower in June, 6.4 % lower in July, and 3.8 % lower in August compared to 2022. Nevertheless, most varieties maintained an average leaf water content level ranging from 60.0 % to 70.0 %. The research also showed that meteorological conditions significantly influenced the water deficit (WD) in the leaves of plum varieties throughout the growing season. Notably, low leaf WD was observed in the varieties Gek, Kubanskaya Kometa, Vengerka Zarechnaya, Vengerka Belorusskaya, Zolotoe Runo, Evraziya 21, Stanley, Orlovskaya Mechta, ELS 18473, Suvenir Vostoka, Skoroplodnaya, and Nezhenka. Under the conditions of a 4-hour dehydration period, the plum varieties Vetraz and Orlovskaya Mechta showed more consistently low water deficit indicators. Furthermore, the Orlovskaya Mechta variety was characterized by high leaf water retention capacity (WRC). The WRC of plum varieties was influenced by leaf age, as the study results indicated that younger leaves of this crop retained water more effectively during the 4-hour dehydration period compared to older leaves. Scientific novelty. The study the indicators of the water regime, a drought-resistant variety of Prunus salicina Orlovskaya Mechta was identified against the background of reduced water scarcity and maximum water retention capacity of the leaf apparatus.
Keywords: species, varieties, plum, water regime, drought resistance, heat resistance
For citation: Ozherelieva Z. Е., Bolgova A. O. Study of water regime indicators in plum varieties of different genetic origins in connection with their drought resistance. Agrarian Bulletin of the Urals. 2025; 25 (02): 176‒190. https://doi.org/10.32417/1997-4868-2025-25-02-176-190 (In Russ.)
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