ArticleScientific reports2025
Exogenously applied putrescine and chitosan-putrescine nanocomposite alleviate the negative effects of chilling stress on iceberg lettuce seedlings.
Article in Scientific reports, 2025. 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
Climate change-induced stressors such as extreme temperatures negatively affect plant growth and development. Therefore, methods are needed to improve plant tolerance to abiotic stresses. The aim of this study was to evaluate whether the foliar application of putrescine (Put) and a chitosan-putrescine nanocomposite (Ch-Put) can modulate the antioxidant response and membrane properties of lettuce under chilling stress. In this study, Put and Ch-Put were applied via foliar spraying at two concentrations (1 mM and 2.5 mM), and after treatment, the plants were placed in a phytotron at 4 °C and 20 °C. Changes in the properties of the cell membranes were assessed in the seedlings. Additionally, the antioxidant enzymatic activity and content of nonenzymatic bioactive compounds were evaluated. The results indicated that the use of Put and Ch-Put influenced the permeability and fluidity of the lipid membranes, which also depended on the treatment temperature. An increase in A
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