Department of Plant and Soil Sciences, Delaware Biotechnology Institute, University of Delaware, Newark, DE 19711, USA.
Trends Plant Sci. 2011 Apr;16(4):201-10. doi: 10.1016/j.tplants.2011.01.004. Epub 2011 Feb 19.
Plasmodesmata are intercellular channels that establish a symplastic communication pathway between neighboring cells in plants. Owing to this role, opportunistic microbial pathogens have evolved to exploit plasmodesmata as gateways to spread infection from cell to cell within the plant. However, although these pathogens have acquired the capacity to breach the plasmodesmal trafficking pathway, plants are unlikely to relinquish control over a structure essential for their survival so easily. In this review, we examine evidence that suggests plasmodesmata play an active role in plant immunity against viral, fungal and bacterial pathogens. We discuss how these pathogens differ in their lifestyles and infection modes, and present the defense strategies that plants have adopted to prevent the intercellular spread of an infection.
胞间连丝是植物细胞间的通道，建立了相邻细胞之间的共质体通讯途径。由于这一作用，机会性病原体已经进化到利用胞间连丝作为在植物体内从一个细胞传播到另一个细胞的感染途径。然而，尽管这些病原体已经获得了突破胞间连丝运输途径的能力，但植物不太可能轻易放弃对生存至关重要的结构的控制。在这篇综述中，我们研究了胞间连丝在植物抗病毒、真菌和细菌病原体的免疫中的作用的证据。我们讨论了这些病原体在生活方式和感染模式上的差异，并提出了植物为防止感染的细胞间传播而采用的防御策略。
