近年,植物类菌原体病害的病原大体上被归于三个类群:螺原体,类菌原体和类立克次氏体或类立克次氏体细菌、亦有人称为类细菌。前两者缺乏细胞壁,对四环素敏感,对青霉素无反应,而类立克次氏体或类立克次氏体细菌则有细胞壁,对四环素和青霉素都敏感。目前,细胞壁的有无和对四环素青霉素的反应是区分有关病原物类群的重要依据。 在柑桔黄龙病研究中,广西柑桔黄龙病研究 In recent years, the pathogens of phytoplasma diseases have generally been classified into three groups: spirochetes, mycoplasmas, and rickettsial-like bacteria, also known as bacteroids. The former two lacked cell walls, were sensitive to tetracycline, did not respond to penicillin, and rickettsia-like or rickettsial-like bacteria had cell walls that were sensitive to both tetracycline and penicillin. At present, the presence or absence of cell walls and the response to tetracycline penicillin is an important basis for the distinction of pathogenic groups. Study on Citrus Huanglongbing, Guangxi Citrus Huanglongbing