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Objective To investigate the effect of inoculating the associative nitrogen-fixing bacteria strain Paraburkholderia RBCS-17 on the root-associated bacterial community of sugarcane. Methods We employed 16S rRNA gene high-throughput sequencing combined with QIIME 2-based bioinformatics analysis to investigate the effects of inoculating Paraburkholderia RBCS-17 on the alpha diversity, beta diversity, composition, and co-occurrence network of the root-associated bacterial community of sugarcane. Results Inoculating Paraburkholderia RBCS-17 did not significantly affect the diversity but significantly changed the structure of the root-associated bacterial community. Further studies showed that the inoculation significantly increased the relative abundance of Burkholderia, Dyella, and Pseudomonas, while reducing the relative abundance of certain potentially detrimental bacteria such as Ralstonia. In addition, the inoculation altered the key module composition of the bacterial co-occurrence network in sugarcane roots, which suggested that inoculation might influence potential bacterial interactions. Conclusion Inoculating the associative nitrogen-fixing bacterial strain Paraburkholderia RBCS-17 modified the root-associated bacterial community structure of sugarcane, promoting the enrichment of potentially beneficial bacteria while suppressing potentially harmful ones. These findings provide new insights into the intricate interactions among associative nitrogen-fixing bacteria, host plants, and indigenous bacteria.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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