AM真菌与菌丝际细菌协同活化土壤有机磷的机制与调控

doi:10.7525/j.issn.1673-5102.2025.03.005

摘要/Abstract

摘要：

丛枝菌根（AM）真菌与菌丝际细菌互作在植物从土壤中活化及吸收磷的过程中发挥着关键作用。该文系统阐述了AM真菌-细菌互作对土壤磷循环的影响及其调控机制。AM真菌菌丝分泌物中的糖类、羧酸盐和氨基酸等物质为细菌提供碳源并特异性招募解磷细菌，菌丝还能作为“移动桥梁”促进细菌迁移。在群落水平上，AM真菌能够调控菌丝际细菌的结构和功能，富集含有磷酸酶基因（如phoD）的功能细菌，提高磷酸酶活性，促进有机磷矿化。基于上述机制，通过调控土壤碳磷摩尔比、添加菌丝分泌物成分等策略可以发挥AM真菌-细菌互作的生物学潜力，提高土壤磷利用效率。

关键词: 菌根真菌, 菌丝际, 解磷细菌, 土壤有机磷, 真菌-细菌互作

Abstract:

The interaction between arbuscular mycorrhizal（AM） fungi and soil bacteria plays a crucial role in plant phosphorus acquisition. This review systematically elucidated the impact of AM fungi-bacteria interactions on soil phosphorus cycling and their regulatory mechanisms. AM fungal hyphal exudates， including sugars， carboxylates， and amino acids， provide carbon sources for bacteria and specifically recruit phosphate-solubilizing bacteria， while the hyphae serve as "mobile bridges" to facilitate bacterial migration. Besides， AM fungi can modulate the structure and function of the hyphosphere microbiome， enriching functional bacteria carrying the phoD gene， enhancing phosphatase activity， and promoting organic phosphorus mineralization. Based on these mechanisms， strategies such as regulating soil C：P ratio and supplementing hyphal exudate components can regulate AM fungi-bacteria interactions and improve soil phosphorus utilization efficiency.

Key words: arbuscular mycorrhizal fungi, hyphosphere, phosphate-solubilizing bacteria, soil organic phosphorus, fungal-bacterial interactions

中图分类号:

Q938.1

严文辉, 段世龙, 张林. AM真菌与菌丝际细菌协同活化土壤有机磷的机制与调控[J]. 植物研究, 2025, 45(3): 345-351.

Wenhui YAN, Shilong DUAN, Lin ZHANG. Mechanisms and Regulation of Interactions between AM Fungi and Hyphosphere Bacteria in Organic Phosphorus Mineralization[J]. Bulletin of Botanical Research, 2025, 45(3): 345-351.

图/表 2

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