Early-stage reciprocal cooperation between the arbuscular mycorrhizal fungus Rhizophagus irregularis and the phosphate-solubilizing bacterium Rahnella aquatilis is dependent on external phosphorus availability.

ABSTRACT: Plants, arbuscular mycorrhizal (AM) fungi and soil bacteria coexist stably in ecosystems. Resource availability can affect the mutualistic relationship between plants and AM fungi, but it is unclear how it affects the reciprocal cooperation between AM fungi and bacteria. Here, we used an in vitro culture system containing a source of organic phosphorus (P) to explore the early-stage reciprocal cooperation between the AM fungus Rhizophagus irregularis and the phosphate-solubilizing bacterium (PSB) Rahnella aquatilis under two different levels of inorganic P. Under low inorganic P availability, the reciprocal cooperation between the AM fungus and the PSB, materialized by carbon (C)-P exchange, was strengthened. This was evidenced at transcriptional level by the activation of multiple C metab

SUBMITTER: Duan S 

PROVIDER: S-EPMC12276329 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature