Agriculture and Agri-Food Canada, Southern Crop Protection and Food Research Centre, London, Ontario NV5 4T3, Canada.
Trends Plant Sci. 2010 Oct;15(10):540-5. doi: 10.1016/j.tplants.2010.08.001. Epub 2010 Sep 7.
Great advances have been made in our understanding of the host plant's common symbiosis functions, which in legumes mediate intracellular accommodation of both nitrogen-fixing bacteria and arbuscular mycorrhiza (AM) fungi. However, it has become apparent that additional plant genes are required specifically for bacterial entry inside the host root. In this opinion article, we consider Lotus japonicus nap1 and pir1 symbiotic mutants within the context of other deleterious mutations that impair an intracellular accommodation of bacteria but have no impact on the colonization of roots by AM fungi. We highlight a clear delineation of early signaling events during bacterial versus AM symbioses while suggesting a more intricate origin of the plant's ability for intracellular accommodation of bacteria.
我们对宿主植物共生功能的理解已经取得了很大进展，在豆科植物中，这种共生功能介导了固氮细菌和丛枝菌根（AM）真菌的细胞内共存。然而，显然还需要额外的植物基因来专门促进细菌进入宿主根部。在这篇观点文章中，我们考虑了 Lotus japonicus nap1 和 pir1 共生突变体，以及其他损害细菌细胞内共存但不影响 AM 真菌在根中定殖的有害突变体。我们强调了细菌共生与 AM 共生之间早期信号事件的明确划分，同时提出了植物细胞内共存细菌能力的更复杂起源。
