Arbuscular mycorrhizal fungi (AMF) represent an important group of root symbionts, given the key role they play in the enhancement of plant nutrition, health, and product quality. The services provided by AMF often are facilitated by large and diverse beneficial bacterial communities, closely associated with spores, sporocarps, and extraradical mycelium, showing different functional activities, such as N₂ fixation, nutrient mobilization, and plant hormone, antibiotic, and siderophore production and also mycorrhizal establishment promotion, leading to the enhancement of host plant performance. The potential functional complementarity of AMF and associated microbiota poses a key question as to whether members of AMF-associated bacterial communities can colonize the root system after establishment of mycorrhizas, thereby becoming endophytic. Root endophytic bacterial communities are currently studied for the benefits provided to host plants in the form of growth promotion, stress reduction, inhibition of plant pathogens, and plant hormone release. Their quantitative and qualitative composition is influenced by many factors, such as geographical location, soil type, host genotype, and cultivation practices. Recent data suggest that an additional factor affecting bacterial endophyte recruitment could be AMF and their associated bacteria, even though the mechanisms allowing members of AMF-associated bacterial communities to actually establish in the root system, becoming endophytic, remain to be determined. Given the diverse plant growth–promoting properties shown by AMF-associated bacteria, further studies are needed to understand whether AMF may represent suitable tools to introduce beneficial root endophytes in sustainable and organic agriculture where the functioning of such multipartite association may be crucial for crop production.

丛枝菌根真菌 (AMF) 代表了一组重要的根共生体，因为它们在提高植物营养、健康和产品质量方面发挥着关键作用。AMF 提供的服务通常由大量多样的有益细菌群落提供便利，这些群落与孢子、子实体和根外菌丝体密切相关，表现出不同的功能活动，例如 N ₂固定、养分动员、植物激素、抗生素和铁载体的产生以及菌根的建立促进，从而提高寄主植物的性能。AMF 和相关微生物群的潜在功能互补性提出了一个关键问题，即 AMF 相关细菌群落的成员是否可以在菌根建立后定殖根系，从而成为内生菌。目前正在研究根内生细菌群落，以了解以促进生长、减轻压力、抑制植物病原体和释放植物激素的形式为宿主植物提供的益处。它们的定量和定性组成受许多因素的影响，例如地理位置、土壤类型、宿主基因型和栽培方式。最近的数据表明，影响细菌内生菌募集的另一个因素可能是 AMF 及其相关细菌，尽管允许 AMF 相关细菌群落成员实际在根系中建立并成为内生菌的机制仍有待确定。鉴于 AMF 相关细菌显示出多种促进植物生长的特性，需要进一步研究以了解 AMF 是否可能代表合适的工具，在可持续和有机农业中引入有益的根内生菌，这种多方关联的功能可能对作物生产至关重要. 成为内生菌，还有待确定。鉴于 AMF 相关细菌显示出多种促进植物生长的特性，需要进一步研究以了解 AMF 是否可能代表合适的工具，在可持续和有机农业中引入有益的根内生菌，这种多方关联的功能可能对作物生产至关重要. 成为内生菌，还有待确定。鉴于 AMF 相关细菌显示出多种促进植物生长的特性，需要进一步研究以了解 AMF 是否可能代表合适的工具，在可持续和有机农业中引入有益的根内生菌，这种多方关联的功能可能对作物生产至关重要.