作　　者： ; ; ;

机构地区： 江苏农林职业技术学院风景园林系

出　　处： 《浙江林学院学报》 2009年第4期498-502,共5页

摘　　要： 研究了长筒石蒜Lycoris longituba切花衰败过程中4个不同时期的生理、生化和细胞超微结构的变化,为长筒石蒜切花保鲜提供理论依据。结果表明,随着花朵的开放和衰老,花瓣中的可溶性蛋白质质量分数逐渐降低,丙二醛(MDA)质量摩尔浓度和膜相对透性逐渐上升,但衰老末期可溶性蛋白质质量分数与游离氨基酸总量之间不呈负相关。通过细胞超微结构检查,发现细胞呈现有序的死亡变化:薄壁细胞质体中的淀粉粒消失,出现大量的嗜锇颗粒,并出现液泡膜包绕线粒体的吞引现象,核凹陷,核膜破裂,质体解体,有大量的环状片层及吞噬体,质壁分离。表现出植物细胞程序性死亡的典型形态学特征,并与生理学变化相一致。 The changes of physiological and biological and uhrastructure of periods during senescing corolla of Lycoris longituba were studied. Results mesophyll cell in four different showed that from florescence to senescence, soluble protein content in petal declined gradually, but malondialdhyde （MDA） content and membrane relative permeability increased gradually. There also was a positive correlation between soluble protein and free amino acid. Additionally, an orderly change in death was exhibited： the amyloplasts in parenchyma dissolved, many plastoglobuli appeared , the vacuole happened distinct swallow, the nucleus became depressed, the karyotheca burst, the plastid disintegrated, a great deal of annulate lamellae and phagosome appeared, and plasmolysis occurred. The morphological changes during the death of all the organelles within the ce physiological changes. 11 showed the typical features of programmed cell death, which corresponded to the [Ch, 3 fig. 14 ref.]

关 键 词： 植物学 长筒石蒜 切花 花瓣 生理指标 细胞超微结构

领　　域： [生物学]