Fig. 4 | Scientific Reports

Fig. 4

From: Exogenously applied putrescine and chitosan–putrescine nanocomposite alleviate the negative effects of chilling stress on iceberg lettuce seedlings

Fig. 4The alternative text for this image may have been generated using AI.

Changes in the activities of SOD (A) and CAT (B) in iceberg lettuce plants caused by treatment with different concentrations of putrescine and the chitosan–putrescine nanocomposite (Put 1 mM–1 mM putrescine; Ch–Put 1 mM–1 mM chitosan–putrescine nanocomposite; Put 2.5 mM–2.5 mM putrescine; Ch–Put 2.5 mM–2.5 mM chitosan–putrescine nanocomposite; deionized water served as a control—Control) at two temperatures (4 °C and 20 °C). Different letters next to a particular parameter indicate significant differences according to Fisher’s LSD test (p ≤ 0.05). The values presented here are the means ± SEs (n = 3).

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