Screening of strawberry (Fragaria x ananassa Duch.) cultivars for drought tolerance based on physiological and biochemical responses under PEG-induced stress

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dc.authorid0000-0002-9300-1867
dc.authorid0009-0009-1747-4396
dc.contributor.authorAttar, Sule Hilal
dc.contributor.authorSonmez, Duygu Ayvaz
dc.contributor.authorAkbari, Azam
dc.contributor.authorErgun, Dogan
dc.contributor.authorBilgin, Omer Faruk
dc.contributor.authorYesil, Betul
dc.contributor.authorKafkas, Nesibe Ebru
dc.date.accessioned2026-03-14T11:49:06Z
dc.date.available2026-03-14T11:49:06Z
dc.date.issued2025
dc.departmentSiirt Üniversitesi
dc.description.abstractClimate change-driven water scarcity poses increasing challenges to strawberry production worldwide. This study evaluated drought tolerance mechanisms in fifteen strawberry (Fragaria x ananassa Duch.) cultivars in the first year and seven selected cultivars in the second year, including Turkish local varieties, using polyethylene glycol (PEG)-induced drought stress in controlled greenhouse conditions. Key physiological and biochemical parameters were assessed, including relative water content (RWC), chlorophyll content, Photosynthetic Quantum Yield, leaf dry matter content (LDMC), sugar composition, and antioxidant capacity. Drought stress significantly reduced RWC by 13.1% in year one and 7.5% in year two, while chlorophyll content declined by 4.8% and 6.6%, respectively. Photosynthetic Quantum Yield decreased by 7.9% and 12.2% across the two years. Conversely, LDMC increased by approximately 16% in both years, indicating morphological adaptation to water deficit. The most striking response was carbohydrate accumulation, particularly in year one, where total sugar content in 'Sweet Charlie' increased from 3.48% to 28.42%, and 'Monterey' showed an increase from 2.69% to 22.90%. Year two exhibited more moderate sugar responses but stronger correlations between sugar content and RWC (glucose: r = 0.93), suggesting refined osmotic adjustment mechanisms. Antioxidant activity increased across all genotypes under stress, with 'Festival' and 'Sabrina' achieving over 90% antioxidant activity. Principal component analysis and hierarchical clustering effectively discriminated drought-tolerant from sensitive cultivars. 'Brilliance' demonstrated superior drought tolerance, maintaining high RWC (89.2%) and stable sugar metabolism under stress conditions. In contrast, 'Calderon' and 'Plared' showed significant declines in physiological performance. The study reveals cultivar-specific drought response strategies, with sugar accumulation, chlorophyll stability, and antioxidant capacity serving as reliable screening markers. The identified physiological benchmarks and tolerant genotypes ('Brilliance', 'Festival', 'Sweet Charlie', and local variety 'Arnavutky') provide valuable resources for breeding programs targeting enhanced drought resilience. These findings contribute to understanding strawberry adaptation mechanisms under water stress and offer practical tools for sustainable production in water-limited environments.
dc.description.sponsorshipEuropean Union [101000747]; EU
dc.description.sponsorshipThe author(s) declare that no financial support was received for the research and/or publication of this article. The project has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No. 101000747 (Breeding Value project). All authors thank the EU for the financial support.
dc.identifier.doi10.3389/fpls.2025.1655320
dc.identifier.issn1664-462X
dc.identifier.pmid41031301
dc.identifier.scopus2-s2.0-105017806715
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.3389/fpls.2025.1655320
dc.identifier.urihttps://hdl.handle.net/20.500.12604/9094
dc.identifier.volume16
dc.identifier.wosWOS:001582649300001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherFrontiers Media Sa
dc.relation.ispartofFrontiers in Plant Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20260310
dc.subjectStrawberry
dc.subjectDrought Stress
dc.subjectPeg-Induced Stress
dc.subjectPhysiological Traits
dc.subjectBiochemical Markers
dc.subjectCultivar-Specific Response
dc.subjectAntioxidant Activity
dc.titleScreening of strawberry (Fragaria x ananassa Duch.) cultivars for drought tolerance based on physiological and biochemical responses under PEG-induced stress
dc.typeArticle

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