LIPM, Université de Toulouse, INRA, CNRS, Castanet-Tolosan cedex, France.
Department of Evolution Ecology and Organismal Biology, University of California, Riverside, CA, USA.
Curr Opin Plant Biol. 2018 Aug;44:7-15. doi: 10.1016/j.pbi.2017.12.001. Epub 2017 Dec 29.
By evolving the dual capacity of intracellular survival and symbiotic nitrogen fixation in legumes, rhizobia have achieved an ecological and evolutionary success that has reshaped our biosphere. Despite complex challenges, including a dual lifestyle of intracellular infection separated by a free-living phase in soil, rhizobial symbiosis has spread horizontally to hundreds of bacterial species and geographically throughout the globe. This symbiosis has also persisted and been reshaped through millions of years of history. Here, we summarize recent advances in our understanding of the molecular mechanisms, ecological settings, and evolutionary pathways that are collectively responsible for this symbiotic success story. We offer predictions of how this symbiosis can evolve under new influences and for the benefit of a burgeoning human population.
通过在豆科植物中进化出细胞内生存和共生固氮的双重能力，根瘤菌在生态和进化上取得了成功，从而重塑了我们的生物圈。尽管面临着包括细胞内感染和土壤中自由生活阶段的双重生活方式等复杂挑战，但根瘤菌共生已经在全球范围内横向传播到数百种细菌物种，并在地理上得到了传播。这种共生关系也在数百万年的历史中得以延续和重塑。在这里，我们总结了最近在理解分子机制、生态环境和进化途径方面的进展，这些进展共同促成了这一共生成功的故事。我们还预测了这种共生关系在新的影响下以及为不断增长的人口的利益将如何进化。
