ArticleFrontiers in plant science2026
Evaluation and physiological response of peony (
Article in Frontiers in plant science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Herbaceous peony ( Methods: In this study, 20 herbaceous peony cultivars were subjected to 400 mM NaCl solution (1 L per pot), applied once every 3 days for a total of 5 applications over 15 days. A non-saline control (0 mM NaCl) was used for phenotypic reference, with higher phenotypic injury scores representing more serious damage. Seven morphological indices were measured before salt treatment, and phenotypic and physiological indices were determined after treatment. Results: Phenotypic scoring and cluster analysis indicated that three cultivars, namely 'Red Charm', 'Bartzella', 'Sarah Bernhardt', showed the strongest relative salt tolerance under severe stress. Correlation and stepwise regression analyses suggested that leaf thickness and stem diameter could serve as potential preliminary indicators for salt tolerance evaluation, with higher values corresponding to better salt tolerance. Under salt stress, salt-tolerant cultivars exhibited higher antioxidant enzyme activities, as well as significantly lower relative electrolyte leakage and malondialdehyde (MDA) content than salt-sensitive cultivars ( Discussion: This study provides exploratory evidence for the rapid screening of salt-tolerant germplasm in herbaceous peony using morphological indicators.
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