Exogenously applied putrescine and chitosan-putrescine nanocomposite alleviate the negative effects of chilling stress on iceberg lettuce seedlings.

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

SUBMITTER: Kalisz A 

PROVIDER: S-EPMC12289975 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature