Synergy between Arbuscular Mycorrhizal Fungi and Rhizosphere Bacterial Communities Increases the Utilization of Insoluble Phosphorus and Potassium in the Soil by Maize

Yunjian Xu; Yixiu Yan; Tianyi Zhou; Yufan Lu; Xinyu Yang; Kailei Tang; Fang Liu

doi:10.1021/acs.jafc.4c07428

Synergy between Arbuscular Mycorrhizal Fungi and Rhizosphere Bacterial Communities Increases the Utilization of Insoluble Phosphorus and Potassium in the Soil by Maize

J Agric Food Chem. 2024 Oct 10. doi: 10.1021/acs.jafc.4c07428. Online ahead of print.

Authors

Yunjian Xu¹, Yixiu Yan², Tianyi Zhou², Yufan Lu², Xinyu Yang², Kailei Tang², Fang Liu²

Affiliations

¹ Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China, Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology and Centre for Invasion Biology, Institute of Biodiversity, School of Ecology and Environmental Science, Yunnan University, Kunming, Yunnan 650504, China.
² School of Agriculture, Yunnan University, Kunming 650504, China.

PMID: 39389770
DOI: 10.1021/acs.jafc.4c07428

Abstract

Arbuscular mycorrhizal (AM) fungi can enhance plant uptake of phosphorus (P) and potassium (K), but it is not yet clear whether rhizosphere bacteria can enhance the ability of AM fungi to acquire insoluble P and K from the soil. Here, pot experiments confirmed that AM fungus-promoted insoluble P and K uptake by plants requires rhizosphere bacteria. The changes of rhizosphere bacterial communities associated with AM fungi were explored by 16S rRNA amplicon sequencing and metagenomic sequencing. Five core bacteria genera identified were involved in P and K cycles. Synthetic community (SynCom) inoculation revealed that SynCom increased soil available P and K and its coinoculation with AM fungi increased P and K concentration in the plants. This study revealed that AM fungi interact with rhizosphere bacteria and promote insoluble P and K acquisition, which provided a foundation for the application of AM fungal-bacterial biofertilizers and was beneficial for the sustainable development of agriculture.

Keywords: arbuscular mycorrhizal (AM) fungi; maize (Zea mays); phosphorus availability; potassium availability; rhizosphere bacteria.