Drought tolerance of strawberries as related to reaction type and water content and redistribution in leaves

D.B. Shokaeva
In conditions of central Russia strawberries are often exposed to drought. Cultivars differ in drought resistance. The research was undertaken in very dry summer seasons of 2010 and 2012 to find out relations of damage rates of genotypes to plant behaviour specifics. Leaf water contents, using methods of weighing before and after drying out, plant damage rates and symptoms, and behaviour habits during dry periods were established. Plants of genotypes present in both studies behaved similarly. Tolerance to drought was dependent not only on the capability to restrict transpiration and to maintain high water contents in leaves (62.0% and higher). Some (selection Or 965-7-1) showed capability to tolerate low leaf water contents (about 60.0%). Genotypes with large crowns and tough leaves - 'Saint Williams', 'Pandora', Or 967-9-15 and Or 975-12-72 - resisted drought more successfully, maintaining high water contents in leaves at the cost of growth breaking and partial redistribution of inner water from their lowest to upper leaves. Plants of 'Alice' intensively compensated water shortage in younger leaves at the cost of older ones and kept growing, which resulted in losing the majority of leaves and inability of plant revival. Strawberry genotypes displayed three main reaction types to drought.
Shokaeva, D.B. (2021). Drought tolerance of strawberries as related to reaction type and water content and redistribution in leaves. Acta Hortic. 1309, 253-260
DOI: 10.17660/ActaHortic.2021.1309.37
https://doi.org/10.17660/ActaHortic.2021.1309.37
Fragaria × ananassa Duch., breeding, cultivar, water stress
English

Acta Horticulturae