Viruses, non-cellular biological entities composed of a protein shell and genetic materials, must parasitize living cells to proliferate and are the most numerous biological entities on Earth. Soil is an important reservoir of viruses, predominantly bacteriophages that infect prokaryotes. Soil viruses play crucial ecological roles in regulating host community structure, driving microbial evolution, and mediating biogeochemical cycles. Delving into these functions and their mechanisms not only elucidates the indispensable role of viruses in soil ecosystems but also underpins sustainable soil management. In this paper, we summarized current knowledge on the ecological functions of soil bacteriophages, including (1) host community modulation: selective survival strategies (e.g., lytic-lysogenic switches) that reshape microbial composition and diversity, while altering host virulence and fitness; (2) evolutionary drivers: horizontal gene transfer mediated by viral vectors and host-pathogen coevolution dynamics; (3) biogeochemical catalysts: the viral shunt mechanism, alongside auxiliary metabolic genes enhancing nutrient cycling; (4) cross-kingdom impacts: direct interactions with plant rhizospheres and indirect effects on human health via zoonotic gene dissemination. According to the research progress, we make an outlook on the future research directions regarding the ecological functions of soil viruses.
| 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 |