The Effect of Late Frost Damage on the Growth and Development of Flower Organs in Different Types of Peach Varieties

文献类型： 外文期刊

第一作者： Niu, Ruxuan

作者： Niu, Ruxuan;Huang, Juanjuan;Zhang, Yiwen;Wang, Chenbing

作者机构：

关键词： peach varieties; late frost damage; hormones; enzyme content; osmotic regulator

期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）

ISSN：

年卷期： 2025 年 15 卷 6 期

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收录情况： SCI

摘要： Late frost damage in spring is a significant limiting factor in peach industry development, with the flowering period being the most vulnerable to late frost. This study aimed to observe the flower organ state and physiological changes of two peach varieties under various temperature treatments and to provide a theoretical basis for selecting frost-resistant varieties. By analyzing the supercooling points of 'Longyoutao 1' (Y1) and 'Longmi 15' (L15), we simulated late frost at five temperatures, 4 degrees C, 2 degrees C, 0 degrees C, -2 degrees C, and -4 degrees C, and observed the flower organ changes at these five temperature stages during the flowering period. The contents of flower hormones (IAA, GA, ABA), membrane lipid peroxidation products (MDA), antioxidant enzymes (POD, SOD, CAT), and osmoregulatory substances (Pro, SS) were analyzed under various low-temperature stress conditions. The results showed no significant difference in flower morphology between Y1 and L15 at 4 degrees C, 2 degrees C, and 0 degrees C. At -2 degrees C, the anthers of Y1 turned brown and dried, the ovary froze, and water stains appeared on the sepals and the center. At -4 degrees C, the water stain on the ovary intensified, and the ovule froze. Moreover, by integrating the differences in the contents of IAA, GA, ABA, MDA, POD, SOD, and SS of the two varieties at the critical temperature of 0 degrees C, L15 showed the strongest ability to resist late frost. This study provides a physiological foundation for researching frost resistance during the flowering period.

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