拟南芥易受霜霉病菌的感染。
Arabidopsis is susceptible to infection by a downy mildew fungus.
作者信息
Koch E, Slusarenko A
机构信息
Institut für Pflanzenbiologie, Zürich, Switzerland.
出版信息
Plant Cell. 1990 May;2(5):437-45. doi: 10.1105/tpc.2.5.437.
A population of Arabidopsis thaliana growing locally in a suburb of Zürich called Weiningen was observed to be infected with downy mildew. Plants were collected and the progress of infection was investigated in artificial inoculations in the laboratory. The plants proved to be highly susceptible, and pronounced intercellular mycelial growth, haustoria formation, conidiophore production, and sporulation of the causal organism Peronospora parasitica were all observed. The formation of oogonia, antheridia, and oospores also occurred. In contrast, Arabidopsis strain RLD was resistant to infection and none of the above structures was formed. The fungus was localized very soon after penetration of RLD leaf cells, which responded with a typical hypersensitive reaction. The differential interaction of an isolate of P. parasitica with two strains of Arabidopsis opens up the possibility of cloning resistance determinants from a host that is very amenable to genetic and molecular analysis.
在苏黎世郊区韦宁根当地生长的拟南芥种群被观察到感染了霜霉病。收集了这些植物，并在实验室进行人工接种以研究感染进程。结果证明这些植物高度易感，观察到了病原菌寄生霜霉显著的细胞间菌丝生长、吸器形成、分生孢子梗产生和孢子形成。卵孢子、雄器和卵孢子也有形成。相比之下，拟南芥RLD品系对感染具有抗性，上述结构均未形成。真菌在穿透RLD叶片细胞后很快就被定位，叶片细胞则以典型的过敏反应作出响应。寄生霜霉的一个分离株与两个拟南芥品系的差异相互作用，为从一个非常适合进行遗传和分子分析的宿主中克隆抗性决定因素提供了可能性。
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