Summary
This 2025 study, published in Nature Communications, investigates how the domestication of rice has altered rhizosphere microbial communities with consequential effects on soil nitrogen cycling. The research suggests that domesticated rice varieties have reduced populations of nitrogen-fixing microorganisms whilst concurrently increasing nitrous oxide emissions—a potent greenhouse gas. The findings highlight unintended ecological trade-offs embedded in crop domestication and raise questions about the sustainability of current rice cultivation systems.
UK applicability
Rice is not a major UK crop; however, the mechanistic insights into how crop domestication reshapes soil microbiota and nitrogen cycling may inform breeding and agronomic strategies in cereals and other field crops grown in the UK, particularly regarding nitrogen use efficiency and greenhouse gas mitigation.
Key measures
Rhizosphere microbiome composition (likely 16S rRNA sequencing), nitrogen fixation rates, nitrous oxide (N₂O) emissions, microbial community structure and function
Outcomes reported
The study compared rhizosphere microbiome composition, nitrogen fixation capacity, and nitrous oxide emissions between domesticated rice and wild rice relatives. As suggested by the title, domestication appears to have reduced beneficial nitrogen-fixing microbial communities whilst increasing nitrous oxide emissions.
Topic tags
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