Response of black currant plants to abnormalities in water and temperature regime 2020

Federal State Budgetary Scientific Institution «I.V. Michurin Federal Scientific Center», 393774 Michurinsk, Russian Federation

^* Corresponding author: berrys-m@mail.ru

Abstract

The water-temperature regime features in the Central Chernozem region in 2020 were reviewed. The main deviations from the mean perennial values of air temperature and humidity, as well as the precipitation distribution in spring and summer were determined. It was revealed that the distinctive feature of the entire 2020 growing season was significant instability of weather conditions - dry periods with high air temperatures were followed by wet and cool periods. In addition, a high amplitude of the daily air temperature difference was noted, which was significantly exceeding the average perennial values. The phenotypic, biological and physiological responses of black currant plants to anomalies of the water-temperature regime were studied; in particular, monitoring of photosynthetic activity dynamics of black currant plants revealed differences in response depth to damaging effects of adverse weather, depending on the variety and age of the plants. It was found that in black currant plants older than 5 years, the reaction to temperature anomalies is weaker than in three-year-old’s. The reaction depth of phenological, biological and economic characteristics to the effect of water-temperature abnormalities firstly depends on the variety’s genotypic features.