1967年,日本土居养二等首先报道了桑树萎缩病等四种植物病害的病株中存在类菌原体。至今,国内外已陆续报道了140多种植物病害被认为属於类菌原体病害。各种植物类菌原体病害研究进展情况很不相同。有的已肯定了病原性(如几种植物螺原体病害):而有的病害仅因用四环素族抗生素处理后,取得一定疗效,才推断由类菌原体致病。绝大部分与类菌原体有关的植物病害, In 1967, Japan’s indigenous second class was the first to report the presence of mycoplasmas in four diseased plants such as mulberry atrophy. So far, more than 140 kinds of plant diseases have been reported at home and abroad are considered to belong to the class of mycoplasma disease. The progress of research on various plant pathogenic mycoplasmas is very different. Some have affirmed the pathogenic (such as several plant spirillum disease): and some diseases only because of tetracycline antibiotics, and achieved some curative effect, it was concluded that the pathogens caused by mycoplasmas. Most of the phytoplasma-related plant diseases,