低温胁迫下不同月季品种的抗寒性评价

为了给兰州新区双膜大棚冬季月季种植品种的选择提供科学依据，通过对 5 个月季品种进行低温胁迫处理，分析其生长和生理生化指标的变化，以筛选出具有较强抗寒能力的月季品种。结果表明，供试月季品种粉扇(木香嫁接)和扉扇在低温胁迫下鲜重下降较少，粉扇鲜重下降最多。干重下降最少的是粉扇(木香嫁接)和朱墨双辉。粉扇(木香嫁接)和粉扇的相对电导率和丙二醛含量较小，膜脂过氧化程度较弱。与其余品种相比，粉和平的游离脯氨酸含量最多。粉扇(木香嫁接)和粉和平的可溶性糖含量、可溶性蛋白含量则均高于其他品种。主成分分析表明，抗寒性最强的月季品种是粉和平与扉扇，粉扇(木香嫁接)次之，粉扇和朱墨双辉抗寒性较弱。综合以上结果认为，在兰州新区双膜大棚冬季种植时建议优先考虑月季品种粉和平、扉扇。

Evaluation of Cold Resistance in Different Chinese Rose Varieties under Low Temperature Stress

To provide a scientific basis for selecting Chinese rose varieties for winter cultivation in double-layered greenhouses in Lanzhou New Area, this study subjected 5 Chinese rose varieties to low temperature stress and analyzed changes in their growth and physiological and biochemical indicators to identify those with strong cold resistance. Results showed that the varieties Fenshan(grafted with Muxiang) and Feishan experienced the least reduction in fresh weight under stress, with Fenshan showing the most significant decrease. Fenshan (grafted with Muxiang) and Zhumoshuanghui showed the least reduction in dry weight. Fenshan (grafted with Muxiang) and Fenshan had lower relative electrical conductivity and malondialdehyde content, indicating less lipid peroxidation. Compared to other varieties, Fenheping had the highest content of free proline. Fenshan(grafted with Muxiang) and Fenheping had higher contents of soluble sugars and proteins than other varieties. Principal component analysis indicated that the strongest cold-resistant varieties were Fenheping and Feishan, followed by Fenshan (grafted with Muxiang), with Fenshan and Zhumoshuanghui being less cold-resistant. Based on these results, it is recommended to prioritize the varieties Fenheping and Feishan for winter cultivation in double-layered greenhouses in the Lanzhou New Area.