Limited effect of short- to mid-term storage conditions on an Australian farmland soil RNA virome.
Sadiq S, Xue P, Tang Y, Du M, Van Brussel K
Soil Health
Invisible viral world living in garden and farm soils influences plant health, nutrient cycling, and crop yields — and this research gives scientists the tools to finally map that world reliably.
Scientists wanted to understand what viruses live in farm soil, but first they had to figure out how to store soil samples without the genetic material inside breaking down. They tested different preservation methods and found that simply keeping soil cold in a regular or deep freezer works fine for weeks or months. Using this approach, they uncovered nearly 1,500 viruses that had never been seen before — most of them associated with the microbes that drive soil health.
Key Findings
Soil samples stored at 2–8°C or -30°C remained stable for at least 2 weeks with no measurable loss in RNA quality or viral diversity.
Samples stored at -80°C maintained integrity for at least 3 months, while no commercial preservative solution proved effective.
Analysis of 32 sequencing libraries identified 1,475 putative novel RNA viruses, the majority belonging to microbe-associated viral lineages.
chevron_right Technical Summary
Researchers discovered that soil samples can be stored at standard freezer temperatures for weeks to months without degrading the RNA needed to detect viruses, enabling the identification of 1,475 previously unknown RNA viruses in Australian farmland soil.
Abstract Preview
Soils represent one of the largest and most diverse reservoirs of microbial life on Earth, yet their associated RNA viruses remain underexplored compared to animal and aquatic systems. Viral discov...
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