Freezing injury is one of the most critical climatic factors impacting pomegranate development and productivity. The goal of this study was not only to assess the freezing tolerance of 20 pomegranate varieties from various parts of Iran but also to look into a possible link between freezing tolerance and tree and fruit traits, as well as geographic and meteorologic factors. Freezing tolerance was measured using the LT50 (the lethal temperature at which 50% of electrolytic leakage occurs and 50% of tissue dies) method. The results showed large differences in freezing tolerance (−15.33 °C to −24.36 °C) among the studied pomegranate cultivars and can be classified as cold sensitive (−15.33 °C to −18.66 °C), intermediate (−19.23 °C to −22 °C), and winter hardy (−22.56 °C to −24.36 °C). Based on the data obtained, the freezing tolerance of pomegranate correlated well with some tree and fruit characteristics, such as chilling for the start of bud break (r = 0.63), seed toughness (r = −0.63), and pH of fruit juice (r = 0.38). Moreover, the results showed that the freezing tolerance of pomegranate was related to some geographic and climatic parameters occurring in the natural habitats of the studied cultivars, including mean wind speed (r = 0.36) and longitude (r = 0.39). The study revealed that the high variations in freezing tolerance among Iranian pomegranates should be considered in further breeding programs and in the selection of cultivars for neighboring regions and other regions with colder climates. To this end, useful correlations between frost tolerance, environmental factors of original locations, and other tree and fruit characteristics could be used as indirect indicators.

冻害是影响石榴发育和产量的最关键的气候因素之一。这项研究的目的不仅是评估来自伊朗各地的 20 个石榴品种的抗冻性，而且还探讨抗冻性与树木和果实性状以及地理和气象因素之间可能存在的联系。使用 LT50（发生 50% 电解泄漏和 50% 组织死亡时的致死温度）方法测量冷冻耐受性。结果表明，所研究的石榴品种之间的耐冻性（-15.33℃至-24.36℃）存在较大差异，可分为冷敏感品种（-15.33℃至-18.66℃）、中间品种（-19.23℃至-22℃）和耐寒品种（-22.56℃至-24.36℃）。根据获得的数据，石榴的耐冻性与一些树木和果实特性密切相关，例如发芽开始时的低温（r = 0.63）、种子韧性（r = -0.63）和果汁的 pH 值（r = 0.38）。此外，结果表明，石榴的抗冻能力与所研究品种自然栖息地的一些地理和气候参数有关，包括平均风速（r = 0.36）和经度（r = 0.39）。研究表明，在进一步的育种计划以及为邻近地区和其他气候寒冷地区选择品种时，应考虑伊朗石榴耐冻性的巨大差异。为此，抗冻性、原始地点的环境因素之间的有用相关性，