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Soil microbe inoculation alters the bacterial communities and promotes root growth of Atractylodes lancea under heat stress

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Abstract

Purpose

Atractylodes lancea is a medicinal plant widely used in treating rheumatic diseases, digestive disorders, night blindness, and influenza. Microbes greatly impact plant growth and metabolism. However, the microbiome associated with A. lancea remains unclear. Hence, we aimed at assessing the effect of soil microbe inoculation on A. lancea under heat stress from multiple perspectives, including regulation of growth, valuable secondary metabolites, root endophytic and rhizosphere bacterial communities.

Methods

A. lancea was inoculated with soil microbes, then grown under normal/high temperature. Biomass, chlorophyll contents, production of major medicinal compounds, physiochemical properties of the soil, and in the composition of root bacterial communities of A. lancea were investigated.

Results

Soil microbe inoculation promoted root sink strength, accumulation of medicinal compounds, and attenuated damage caused by heat stress. A. lancea showed preference for the endophytic bacterial genera Rhodococcus, Ralstonia, Dongia Paenibacillus and Burkholderia-Caballeronia-Paraburkholderia post-inoculation, the latter four genera playing important roles in protection from heat stress, with abundance of the latter two specifically positively correlated to medicinal compound production. A. lancea enriched the bacterial genera Saccharimonadales, Novosphingobium and excluded Chitinophaga in its rhizosphere post-inoculation.

Conclusions

Soil microbes characteristically promoted A. lancea growth, improved heat stress tolerance, and promoted root medicinal compound accumulation. A. lancea selectively enriched particular endophytic and rhizospheric bacterial communities post-inoculation, possibly due to unique aromatic root exudates. The selected bacteria potentially synergistically improved soil available nutrients and uptake by root. Bacterial species selected by A. lancea root have the potential to serve as biological fertilizers for A. lancea farming.

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Data availability

Publicly available datasets were analyzed in this study. These data can be found in the NCBI database under accession numbers SRR13132034–SRR13132056.

Code availability

The codes in this article are available on the free online platform of Majorbio Cloud Platform (www.majorbio.com).

References

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Acknowledgments

We acknowledge Stefana-Catrinel Catana BSc of University College London for polishing the English of this manuscript. This study was supported by the National Key Research and Development Program of China (No.2017YFC1700701, No.2017YFC1700704), the National Natural Science Foundation of China (No.81891014), the Ministry of Finance Central Level of the Special (No.2060302), the Fundamental Research Funds for the Central public welfare research institutes (ZZ13-036-2), and the Special fund for the construction of modern agricultural industrial technology system (CARS-21).

Funding

This study was supported by the National Key Research and Development Program of China (No.2017YFC1700701, No.2017YFC1700704), the National Natural Science Foundation of China (No.81891014), the Ministry of Finance Central Level of the Special (No.2060302), the Fundamental Research Funds for the Central public welfare research institutes (ZZ13–036-2), and the Special fund for the construction of modern agricultural industrial technology system (CARS-21).

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Contributions

All authors contributed to the conception and design of this study. Material preparation, data measurements and analyses were performed by HW, YW, DJ, and ZX. The first draft of the manuscript was written by HW. The latest version of the manuscript was written by YW. HW and YW made the figures. All authors gave valuable suggestions on each version of the manuscript; all authors read and approved the final manuscript.

Corresponding authors

Correspondence to Dahui Liu or Lanping Guo.

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There are no moral and ethical issues or conflicts to declare in this paper.

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This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Wang, H., Wang, Y., Jiang, D. et al. Soil microbe inoculation alters the bacterial communities and promotes root growth of Atractylodes lancea under heat stress. Plant Soil 478, 371–389 (2022). https://doi.org/10.1007/s11104-022-05369-6

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  • DOI: https://doi.org/10.1007/s11104-022-05369-6

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