论文部分内容阅读
在人类与疾病搏斗的沙场上,一个难以对付的敌人要算病毒了。除了天花、狂犬病、肝炎和麻疹等以外,甚至连人类的某些恶性肿瘤,病毒也是被怀疑的致病对象。病毒不仅危害人体健康,同样也侵害植物。目前受病毒病为害的植物种类极多,如水稻、马铃薯、甘薯、油菜、大蒜以及多种花卉植物等等。通常一种病毒能感染多种植物,而同一种植物又会被多种病毒所感染。病毒病原,是一类结构非常简单的生物,大部分病毒是由核酸和蛋白质分子所组成(只有
In the battle of mankind and disease battlefield, a difficult enemy to count as a virus. In addition to smallpox, rabies, hepatitis and measles, and even some human malignancies, the virus is also suspected of causing disease. Viruses not only endanger human health, but also harm plants. At present, many kinds of plants are damaged by virus diseases, such as rice, potato, sweet potato, rape, garlic and many kinds of flower plants. Usually a virus can infect a variety of plants, and the same kind of plant will be infected by a variety of viruses. Viral pathogens, is a very simple structure of organisms, most of the virus is composed of nucleic acid and protein molecules (only