Plant residue chemistry impacts soil processes and microbial community structure: A study with Arabidopsis thaliana cell wall mutants

► Arabidopsis thaliana residue chemistry and soil texture may affect soil processes. ► C:N ratio and acid unhydrolyzable fraction (AUF) affected by single gene knockouts. ► C:N ratio and AUF affected CO2 production, mineral N and microbial communities. ► AUF-rich root residue increased fungi, but not bacteria or actinobacteria. ► Soil texture had a minor effect on soil processes and microbial communities.