Sainsbury Laboratory Cambridge University (SLCU), Bateman Street, Cambridge, UK.
Plant Cell Environ. 2023 Oct;46(10):2998-3011. doi: 10.1111/pce.14553. Epub 2023 Feb 9.
Plant root architecture is developmentally plastic in response to fluctuating nutrient levels in the soil. Part of this developmental plasticity is the formation of dedicated root cells and organs to host mutualistic symbionts. Structures like nitrogen-fixing nodules serve as alternative nutrient acquisition strategies during starvation conditions. Some root systems can also form myconodules-globular root structures that can host mycorrhizal fungi. The myconodule association is different from the wide-spread arbuscular mycorrhization. This range of symbiotic associations provides different degrees of compartmentalisation, from the cellular to organ scale, which allows the plant host to regulate the entry and extent of symbiotic interactions. In this review, we discuss the degrees of symbiont compartmentalisation by the plant host as a developmental strategy and speculate how spatial confinement mitigates risks associated with root symbiosis.
植物根系结构在发育上具有可塑性，能够响应土壤中养分水平的波动。这种发育可塑性的一部分是形成专门的根细胞和器官来容纳互利共生体。像固氮根瘤这样的结构在饥饿条件下是替代营养获取策略。一些根系也可以形成菌根球——球状根结构，可以容纳菌根真菌。菌根球的共生关系与广泛存在的丛枝菌根化不同。这种共生关系的范围提供了不同程度的隔室化，从细胞到器官尺度，这使得植物宿主能够调节共生相互作用的进入和程度。在这篇综述中，我们讨论了植物宿主对共生体的隔室化程度作为一种发育策略，并推测空间限制如何减轻与根共生相关的风险。
