Microbiome convergence enables siderophore-secreting-rhizobacteria to improve iron nutrition and yield of peanut intercropped with maize

Nanqi Wang, Tianqi Wang, Yu Chen, Ming Wang (), Qiaofang Lu, Kunguang Wang, Zhechao Dou, Zhiguang Chi, Wei Qiu, Jing Dai, Lei Niu, Jianyu Cui, Zhong Wei (), Fusuo Zhang, Rolf Kümmerli and Yuanmei Zuo ()
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Nanqi Wang: China Agricultural University
Tianqi Wang: China Agricultural University
Yu Chen: Jiangsu Province and Chinese Academy of Sciences
Ming Wang: Nanjing Agricultural University
Qiaofang Lu: China Agricultural University
Kunguang Wang: China Agricultural University
Zhechao Dou: China Agricultural University
Zhiguang Chi: China Agricultural University
Wei Qiu: China Agricultural University
Jing Dai: China Agricultural University
Lei Niu: China Agricultural University
Jianyu Cui: China Agricultural University
Zhong Wei: Nanjing Agricultural University
Fusuo Zhang: China Agricultural University
Rolf Kümmerli: University of Zurich
Yuanmei Zuo: China Agricultural University

Nature Communications, 2024, vol. 15, issue 1, 1-17

Abstract: Abstract Intercropping has the potential to improve plant nutrition as well as crop yield. However, the exact mechanism promoting improved nutrient acquisition and the role the rhizosphere microbiome may play in this process remains poorly understood. Here, we use a peanut/maize intercropping system to investigate the role of root-associated microbiota in iron nutrition in these crops, combining microbiome profiling, strain and substance isolation and functional validation. We find that intercropping increases iron nutrition in peanut but not in maize plants and that the microbiota composition changes and converges between the two plants tested in intercropping experiments. We identify a Pseudomonas secreted siderophore, pyoverdine, that improves iron nutrition in glasshouse and field experiments. Our results suggest that the presence of siderophore-secreting Pseudomonas in peanut and maize intercropped plays an important role in iron nutrition. These findings could be used to envision future intercropping practices aiming to improve plant nutrition.

Date: 2024
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DOI: 10.1038/s41467-024-45207-0

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