论文部分内容阅读
葫芦科的罗汉果(Siraitia grosvenori(Swingle)Jeffrey)感染一种系统性的黄化型病害。 通过两次超薄切片的电镜观察:在病茎和病叶脉的韧皮组织中的薄壁细胞和伴胞中,发现有类菌质体(MLO),同时在重复的电镜观察中,在上述组织的薄壁细胞内,还发现风轮状的病毒(Virus)内含体。在健株的上述组织中。没有发现MLO和风轮状内含体。 在用三种不同接种方法(媒介昆虫、叶擦和汁液重创摩擦)进行的生物学测定的结果表明:罗汉果疱叶丛枝病有广泛的寄生范围,其症状特点:在常用的鉴定病毒的常规寄主上,最终均呈现黄化症状,没有系统性或局部性的斑点反应。其中在葫芦科的某些植物上的症状,基本上与罗汉果的症状相近似:初期明脉或脉间褪绿,继之出现疱状斑驳叶,叶片扭卷畸形,后期黄化。在茄科的供试植物上,症状特点:初期多为脉间褪绿,随之株形矮化,叶片变小。豆科上的症状:既有明脉,也有脉间褪绿,叶片呈现细长扭曲,变小并丛生。十字花科的症状特点是褪绿斑驳叶,株形矮化,叶片变小。
Cucurbitaceae, Siraitia grosvenori (Swingle) Jeffrey, infects a systemic yellowing disease. Electron microscopy observation of two ultrathin sections showed that there was a mycobacterial mass (MLO) in the parenchyma cells and companion cells in the phloem tissues of the diseased and diseased veins and in the repeated electron microscopic observation, Tissue parenchyma, also found that the wind-like virus (Virus) inclusions. In healthy plants in the above tissues. No MLO and wind wheel inclusion bodies were found. The results of the biological assays using three different inoculation methods (vector insects, leaf wipes and juice grazing rubs) showed that the arborvitae has a wide range of parasitic ranges and its symptoms are characterized by: Host, eventually showed yellow symptoms, there is no systematic or localized spots reaction. The symptoms of some plants in Cucurbitaceae are basically similar to the symptoms of Luo Han Guo: the early Ming Melanoma or Meridian, followed by blister mottled leaves, leaf curl malformations, late yellowing. In the Solanaceae for the test plants, the symptoms and signs: early mostly mellow chlorosis, followed by plant-shaped dwarf leaves smaller. Leguminous symptoms: Both Ming veins, but also between the veins chlorotic, elongated slender leaves appear, smaller and clusters. Cruciferous symptoms are characterized by chlorotic mottled leaves, plant dwarf, leaves smaller.