Plant-mediated rhizospheric interactions in intraspecific intercropping alleviate the replanting disease of Radix pseudo
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Plant-mediated rhizospheric interactions in intraspecific intercropping alleviate the replanting disease of Radix pseudostellariae Hongmiao Wu & Manhong Lin & Christopher Rensing & Xianjin Qin & Shengkai Zhang & Jun Chen & Linkun Wu & Yanlin Zhao & Sheng Lin & Wenxiong Lin Received: 19 March 2020 / Accepted: 30 July 2020 # Springer Nature Switzerland AG 2020
Abstract Aims Traditional agricultural systems increasingly contribute to food and livelihood security worldwide. Previous studies have demonstrated the positive effects of intercropping on crop productivity due to the reduced impact of disease. However, surprisingly few studies to Responsible Editor: Hans Lambers Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11104-020-04659-1) contains supplementary material, which is available to authorized users. H. Wu : S. Zhang : J. Chen : L. Wu : Y. Zhao : S. Lin : W. Lin (*) Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, People’s Republic of China e-mail: [email protected] H. Wu : M. Lin : X. Qin : S. Zhang : J. Chen : L. Wu : Y. Zhao : S. Lin : W. Lin Key Laboratory of Crop Ecology and Molecular Physiology, Fujian Agriculture and Forestry University, Fuzhou 350002, People’s Republic of China M. Lin : X. Qin : W. Lin Key Laboratory for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou 350002, People’s Republic of China C. Rensing Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, People’s Republic of China
date have explored the mechanisms underlying the alleviation of agricultural replanting disease by intraspecific intercropping. Methods Here, we performed metabolomic, highthroughput sequencing and quantitative PCR analysis to explore the beneficial effects of intraspecific intercropping on Radix pseudostellariae yields, soil metabolite abundance and microbial communities. Results Our results showed that intraspecific intercropping alleviated the serious replanting disease of R. pseudostellariae. The intercropping increased fungal and bacterial community diversity, increasing the relative abundances of potentially beneficial taxa (e.g., Nitrosomonadales, Nitrospirales, and Pseudomonadales), and decreasing the relative abundances of pathogenic taxa (e.g., Aspergillus and Talaromyces). Quantitative PCR analysis showed intercropping significantly decreased the populations of pathogenic F. oxysporum, and increased the beneficial Pseudomonas spp. and Burkholderia spp. as compared to monoculture. Our findings also suggested that intraspecific intercropping tightened associations within the soil microbiome and promoted microbial co-occurrence. Specifically, we observed that soils subjected to the consecutive monocultu
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