Symbiotic microbes are essential to the ecological success and evolutionary diversification of multicellular organisms. The establishment and stability of bipartite symbioses are shaped by mechanisms ensuring partner fidelity between host and symbiont. In this minireview, we demonstrate how the interface of chemical signals and host structures influences fidelity between legume root nodules and rhizobia, Hawaiian bobtail squid light organs and Allivibrio fischeri, and fungus-growing ant crypts and Pseudonocardia. Subsequently, we illustrate the morphological diversity and widespread phylogenetic distribution of specialized structures used by hosts to house microbial symbionts, indicating the importance of signal-structure interfaces across the history of multicellular life. These observations, and the insights garnered from well-studied bipartite associations, demonstrate the need to concentrate on the signal-structure interface in complex and multipartite systems, including the human microbiome.

中文翻译：

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用于维持共生的信号结构界面的收敛演变。

共生微生物对于多细胞生物的生态学成功和进化多样化至关重要。二分共生体的建立和稳定性由确保宿主与共生体之间伴侣保真度的机制决定。在这个小型复习中，我们证明了化学信号和宿主结构的界面如何影响豆类根瘤和根瘤菌，夏威夷短尾鱿鱼轻器官和短吻Allifibrio fischeri，真菌生长的蚂蚁隐窝和伪狂犬病之间的保真度。随后，我们说明了宿主用来容纳微生物共生体的专门结构的形态多样性和广泛的系统发生分布，表明了跨多细胞生命历史的信号结构界面的重要性。这些观察，