随着科学技术事业的不断发展和对于植物生理、病理情况日益深入的研究,植病、植保工作的广泛发展,新的植物感染性病原不断被发现。在二十世纪初,植物病毒方面的研究在世界上还堪称一个全新的领域。七十年代,人们才开始对类病毒有所认识。近年来,人们又发现了一类新的植物感染原——卫星RNA。称其作卫星RNA是由于此类植物感染原的感染性须依赖于某种特定的植物 With the continuous development of science and technology and the increasingly in-depth research on plant physiology and pathology, the extensive development of plant diseases and plant protection work, new plant infectious pathogens are continuously found. In the early twentieth century, research on plant viruses was still a brand new area in the world. Seventies, people began to recognize the virus. In recent years, people have discovered a new type of plant infection proto-satellite RNA. Called satellite RNA is due to the infectivity of the original infection of such plants to be dependent on a particular plant