There are a large number of non-rhizobia endophytes in addition to rhizobia in leguminous root nodules, which are of great significance for promoting plant growth and improving the bacterial abundance in root nodules. Some NREs can not only help rhizobia expand their host range but also participate in the leguminous plant-rhizobia symbiotic nodulation process. In this review, we systematically summarize the genetic diversity, classification, and functions of NREs, specifically describe the pathways of NREs entering rhizobia, the interaction mechanism between NREs and rhizobia, and the diversity of NREs in soil ecosystems, and discuss the application potential and future research directions of NREs. Furthermore, this article summarizes the current research progress in leguminous plant-rhizobia-NREs interactions and explores the methods of improving crop productivity and health through interactions mediated by nodule microecology, aiming to provide theoretical support for sustainable agricultural development.
| 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 |