植物有病毒病,人和动物也会感染病毒病,只不过病毒的种群不同,各有其专化性和遗传特性,大部分是互不传染的。比如人的感冒是由病毒引起的,它不会传到大白菜上去;同样大白菜的花叶病也是病毒,却不会使人感染。植物病毒既然是一种生命物质,自然有其形态。过去由于光学显微镜分辨不了它,对它的样子描述的很含糊。自从电子显微镜问世用于病毒的试验研究以来,我们可以对病毒粒子进行观察和分类。 Plants have a viral disease, and humans and animals are also infected with the virus, except for the different populations of viruses, each with its own specialization and genetic characteristics, most of which are non-contagious. Such as a human cold is caused by a virus, it does not spread to Chinese cabbage; the same cabbage mosaic disease is also a virus, but does not make people infected. Since plant virus is a kind of living material, it naturally has its shape. In the past because of the optical microscope can not tell it, describe the way it is very vague. Since the advent of electron microscopy for experimental research on viruses, we have been able to visualize and classify virions.