寒旱农业科学2026，Vol.5Issue(5)：458-464,7.DOI:10.3969/j.issn.2097-2172.2026.05.010
单瓣与重瓣紫斑牡丹象牙白花器官衰老生理生化特性研究
Physiological and Biochemical Characteristics of Floral Organ Senescence in Single-petal and Double-petal Paeonia rockii'Xiangyabai'
摘要
Abstract
To explore the physiological mechanism underlying the different senescence processes between single-petal and double-petal flowers of Paeonia rockii'Xiangyabai'and to provide a theoretical basis for flowering regulation and anti-senescence breeding of Paeonia rockii,this study compared the physiological and biochemical characteristics associated with senescence using single-petal floral organs(petals,pistils,sepals)and double-petal floral organs(normal petals,petalized petals,pistils,sepals)at 4 flowering stages(color-showing,initial-bloom,full-bloom,and initial-decline).Soluble protein content,malondialdehyde(MDA)con-tent,and the activities of superoxide dismutase(SOD)and peroxidase(POD)were measured.Morphological observation confirmed that the petalized petals of double-petal flowers senesced earlier than the petals of single-petal flowers.Biochemical results showed that MDA content in all organs of double-petal flowers was significantly higher than that in single-petal flowers at all stages,indicating more severe membrane lipid peroxidation damage.All organs of single-petal flowers,as well as the petalized petals and pistils of dou-ble-petal flowers,exhibited"induced enzyme characteristics",with enzyme activity increasing during the later stage of development.In contrast,the normal petals and sepals of double-petal flowers exhibited a"loss of protective enzyme characteristics",with enzyme activity collapsing after the full flowering stage.The soluble protein content in sepals and pistils remained elevated during the initial-decline stage,suggesting their senescence was delayed compared to that in petals.The accelerated senescence in double-petaled'Xiangyabai'flowers was primarily attributed to the excessive accumulation of MDA and the premature collapse of the antioxidant de-fense system,especially in the normal petals and sepals.关键词
紫斑牡丹/象牙白/花器官/衰老/单瓣/重瓣/丙二醛/抗氧化酶Key words
Paeonia rockii/'Xiangyabai'/Floral organ/Senescence/Single-petal/Double-petal/Malondialdehyde/Antioxi-dant enzyme分类
农业科技引用本文复制引用
刘兴宇,赵萍,刘强德,白玉龙,封成智,尤文军,孙晗嘉..单瓣与重瓣紫斑牡丹象牙白花器官衰老生理生化特性研究[J].寒旱农业科学,2026,5(5):458-464,7.基金项目
甘肃省农业科学院科技创新专项重点研发计划(2024GAAS23) （2024GAAS23）
甘肃省农业科学院院级基础研究计划(2026GAAS22-3). （2026GAAS22-3）
