MA Bao,ZHOU Xinchao,JIANG Congyi,et al.Cold Resistance Evaluation of Crape Myrtle Based on Semi-Lethal Temperature and Principal Component Response Model[J].HEILONGJIANG AGRICULTURAL SCIENCES,2025,(08):72-77100.[doi:10.11942/j.issn1002-2767.2025.08.0072]
基于半致死温度与主成分响应模型的紫薇抗寒性评价
- Title:
- Cold Resistance Evaluation of Crape Myrtle Based on Semi-Lethal Temperature and Principal Component Response Model
- 文章编号:
- 10
- Keywords:
- color-leaf crape myrtle; introduction; critical low temperature; cold resistance assessment; principal component analysis
- 文献标志码:
- A
- 摘要:
- 为筛选可在北方寒冷地区推广应用的彩叶紫薇品种，选取5种彩叶紫薇与1种普通紫薇（对照）作为试验材料，对6种紫薇在0，-5，-10，-15和-20 ℃低温胁迫下的相对电导率、可溶性糖含量、可溶性蛋白含量、丙二醛含量、组织含水量与过氧化氢酶活性进行测定，分别使用半致死温度法与基于主成分分析的临界低温强度法对指标测定结果进行对比分析与排名。结果表明，‘紫莹’在-15 ℃时表现出最优抗寒特征，其丙二醛含量（105 nmol·g-1）、可溶性蛋白含量（0.89 mg·g-1）均显著优于其他品种；‘紫精灵’抗寒性最弱，在-20 ℃时相对电导率达93.1%，丙二醛含量（241.9 nmol·g-1）较同温度下‘紫莹’高46.4%。参试品种的半致死温度排名为‘紫莹’（-9.78 ℃）>‘红叶’（-6.06 ℃）>‘紫韵’（-4.93 ℃）>‘丹红紫叶’（-3.88 ℃）>‘翠薇’（-1.13 ℃）>‘紫精灵’(1.83 ℃)，临界低温强度排名为‘紫莹’（13.4）>‘红叶’（13.3）>‘丹红紫叶’（10.6）>‘紫韵’（9.2）>‘翠薇’（8.8）>‘紫精灵’（4.4）,两种方法的结果相近。综上，‘紫莹’与‘红叶’抗寒性最强，二者在-15 ℃低温胁迫下仍表现出较强的抗寒生理特征，推荐作为北京及类似北方寒冷地区的彩叶紫薇优选品种，而‘紫精灵’抗寒性较差，仅适用于南方地区。
- Abstract:
- In order to screen the varieties of crape myrtle with colorful leaves that can be promoted and applied in the cold regions of northern China, five varieties of crape myrtle with colorful leaves and one variety of common crape myrtle (as the control) were selected as the experimental materials. The relative conductivity, soluble sugar content, soluble protein content, malondialdehyde content, tissue water content and catalase activity of the six varieties of crape myrtle under low-temperature stress at 0, -5, -10, -15 and -20 ℃ were measured.The results of the index determination were compared and ranked by using the semi-lethal temperature method and the critical low-temperature intensity method based on principal component analysis. The results showed that， ‘Ziying’ exhibited the best cold resistance at -15 ℃, with significantly lower malondialdehyde content (105 nmol·g-1) and higher soluble protein content (0.89 mg·g-1) than the other varieties. ‘Zijingling’ had the weakest cold resistance, with a relative conductivity of 93.1% at -20 ℃ and a malondialdehyde content (241.9 nmol·g-1) 46.4% higher than that of ‘Ziying’. The ranking of semi-lethal temperature was ‘Ziying’ (-9.78 ℃) > ‘Hongye’ (-6.06 ℃) > ‘Ziyun’ (-4.93 ℃) > ‘Danhongziye’ (-3.88 ℃) > ‘Cuiwei’ (-1.13 ℃) > ‘Zijingling’ (1.83 ℃). The ranking of critical low-temperature intensity was ‘Ziying’ (13.4) > ‘Hongye’ (13.3) > ‘Danhongziye’ (10.6) > ‘Ziyun’ (9.2) > ‘Cuiwei’ (8.8) > ‘Zijingling’ (4.4). The results of the two methods were similar. ‘Ziying’ and ‘Hongye’ had the strongest cold resistance and could tolerate temperatures below -15 ℃. They are recommended as the preferred varieties of crape myrtle with colorful leaves for Beijing and similar cold regions in northern China. ‘Zijingling’ had the weakest cold resistance and was only suitable for southern regions.
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备注/Memo
收稿日期：2025-04-12