The special metabolites of bell pepper (Capsicum annuum L.) leaves can protect the plant under possibly damaging circumstances, such as high light, UV, unfavorable temperatures, or other environmental effects. In this study, we examined the cold stress tolerance of three different Hungarian pepper varieties (Darina, Édesalma, Rekord), focusing on the antioxidant and photosynthetic responses. The plants were developed in growth chambers under optimal temperature conditions (day/night 25 °C/20 °C) until the leaves on the fourth node became fully developed, then half of the plants received a cold treatment (day/night 15 °C/10 °C). Via a detailed pigment analysis, the PS II chlorophyll fluorescence responses, gas exchange parameters and total antioxidant capacities, leaf acclimation to low temperatures has been characterized. Our results display some of the developing physiological and antioxidant properties, which are among the main factors in monitoring the damaging effects of cold temperatures. Nevertheless, despite their differences, the tested pepper varieties did not show different cold responses.

灯笼椒 ( Capsicum annuum L. )叶子的特殊代谢物可以在可能的破坏性环境下保护植物，例如强光、紫外线、不利温度或其他环境影响。在这项研究中，我们检查了三种不同匈牙利辣椒品种（Darina、Édesalma、Rekord）的冷胁迫耐受性，重点关注抗氧化和光合作用反应。植物在最佳温度条件（昼/夜25℃/20℃）的生长室中发育，直到第四个节点上的叶子完全发育，然后一半植物接受冷处理（昼/夜15℃） /10°C）。通过详细的色素分析、PS II 叶绿素荧光响应、气体交换参数和总抗氧化能力、叶片对低温的适应能力已得到表征。我们的结果显示了一些正在发展的生理和抗氧化特性，这是监测低温破坏性影响的主要因素之一。然而，尽管存在差异，测试的辣椒品种并没有表现出不同的寒冷反应。