Abstract
The bacteria that dominate and become enriched in the rhizosphere during continuous cropping are of increasing interest, as they can greatly adapt to the rhizosphere. However, there are still little knowledge about the general composition and function of these bacteria. In this study, we planted tomatoes in three different soils for three planting cycles and used both high-throughput sequencing and culture-dependent workflows. Despite significant differences in bacterial communities from the initial soils, we observed a similar succession in the rhizosphere bacterial community compositions. We identified certain bacteria that were gradually enriched and potentially beneficial, such as Rhizobium and Flavobacterium. However, some other potentially beneficial bacteria, such as Massilia and Lysobacter, were gradually depleted. Additionally, we found that predicted functions related to xenobiotic biodegradation, nutrient metabolism and antibiotic biosynthesis were enriched in different rhizosphere soils. Beijerinckia fluminensis GR2, which was gradually enriched in all tested soils, significantly inhibited the growth of Ralstonia solanacearum and protected the host from infection. Our study provides new insights into the assembly mechanism of gradually enriched bacteria and their role as plant-beneficial microbes that adapt well to the rhizosphere.
Original language | English |
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Pages (from-to) | 723-732 |
Number of pages | 10 |
Journal | Biology and Fertility of Soils |
Volume | 59 |
Issue number | 7 |
DOIs | |
Publication status | Published - Jan 2023 |
Bibliographical note
Publisher Copyright:© 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
Funding
This work was supported by the National Natural Science Foundation of China (41571242 and 42207359) and the China Postdoctoral Science Foundation (2021M693448).
Funders | Funder number |
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National Natural Science Foundation of China | 41571242, 42207359 |
China Postdoctoral Science Foundation | 2021M693448 |
Keywords
- Beneficial microbes
- Continuous cropping system
- Ralstonia solanacearum
- Rhizosphere bacteria
- Soil types