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1971年,美国科学家迪纳发现一种比病毒还小的侵染性植物病原——类病毒(Viro-id),这是迄今为止人们所发现的最微小生命,也是最微小的植物病原。1978年,在西德慕尼黑市召开了第一届类病毒国际讨论会。类病毒越来越受到各国科学家的关注。一、类病毒的发现早在本世纪二十年代,人们就发现马铃薯会得一种纤块茎病。病株矮化、叶片小而卷曲。地下块茎纤细如纺锤体,严重影响马铃薯的产量和品质。因为这种病很容易通过汁液和蚜虫传播,长期以来被认为是一种病毒病,但始终未能在病薯中发现病毒。
In 1971, American scientist Dina discovered a Viro-id, an infectious plant pathogen that is smaller than the virus, which is by far the smallest and the youngest plant pathogen ever discovered. In 1978, the first international symposium on the virus was held in West Germany. Genus viruses are getting more and more attention from scientists in various countries. First, the discovery of the virus As early as the twenties of this century, people found that the potato will get a fiber tuber. Dwarf disease, leaves small and curly. Slender tubers such as the spindle, seriously affecting the yield and quality of the potato. Because the disease is easily transmitted by juices and aphids and has long been considered a viral disease, it has not been found in the disease.