Quinolone-mediated metabolic cross-feeding develops aluminium tolerance in soil microbial consortia

Zhiyuan Ma, Meitong Jiang, Chaoyang Liu, Ertao Wang, Yang Bai, Mengting Maggie Yuan, Shengjing Shi, Jizhong Zhou, Jixian Ding, Yimei Xie, Hui Zhang, Yan Yang, Renfang Shen, Thomas W. Crowther, Jiabao Zhang and Yuting Liang ()
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Zhiyuan Ma: Chinese Academy of Sciences
Meitong Jiang: Chinese Academy of Sciences
Chaoyang Liu: Chinese Academy of Sciences
Ertao Wang: Chinese Academy of Sciences
Yang Bai: Peking University
Mengting Maggie Yuan: University of California
Shengjing Shi: Lincoln Science Centre
Jizhong Zhou: University of Oklahoma
Jixian Ding: Chinese Academy of Sciences
Yimei Xie: Chinese Academy of Sciences
Hui Zhang: Chinese Academy of Sciences
Yan Yang: Chinese Academy of Sciences
Renfang Shen: Chinese Academy of Sciences
Thomas W. Crowther: ETH
Jiabao Zhang: Chinese Academy of Sciences
Yuting Liang: Chinese Academy of Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract Aluminium (Al)-tolerant beneficial bacteria confer resistance to Al toxicity to crops in widely distributed acidic soils. However, the mechanism by which microbial consortia maintain Al tolerance under acid and Al toxicity stress remains unknown. Here, we demonstrate that a soil bacterial consortium composed of Rhodococcus erythropolis and Pseudomonas aeruginosa exhibit greater Al tolerance than either bacterium alone. P. aeruginosa releases the quorum sensing molecule 2-heptyl-1H-quinolin-4-one (HHQ), which is efficiently degraded by R. erythropolis. This degradation reduces population density limitations and further enhances the metabolic activity of P. aeruginosa under Al stress. Moreover, R. erythropolis converts HHQ into tryptophan, promoting the synthesis of peptidoglycan, a key component for cell wall stability, thereby improving the Al tolerance of R. erythropolis. This study reveals a metabolic cross-feeding mechanism that maintains microbial Al tolerance, offering insights for designing synthetic microbial consortia to sustain food security and sustainable agriculture in acidic soil regions.

Date: 2024
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DOI: 10.1038/s41467-024-54616-0

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