Fig. 2: Principal component analysis (PCA) depicting the effect of warming on soil physicochemical properties and relative transcription of genes involved in the degradation of organic N.
From: Increased microbial expression of organic nitrogen cycling genes in long-term warmed grassland soils
Warming effect on soil physicochemical properties and the cumulative relative transcription level of genes encoding putative organic N-degrading enzymes are shown for the medium-term warmed (MTW) (A) and long-term warmed (LTW) (B) grasslands. DOC, dissolved organic (µg C g−1 dry weight soil); C mic, microbial biomass C (µg C g−1 dry weight soil); N mic, microbial biomass N (µg N g−1 dry weight soil); TFAA, total free amino acids (µg N g−1 dry weight soil); CN mic, microbial C to N ratio. DOC, pH, and microbial biomass C and N contents for these samples were retrieved from [34]. Enzyme data are expressed per unit of microbial biomass C (Table S8). The cumulative relative transcription of genes involved the degradation of the different organic N compounds is indicated by the colored arrows: chitin (orange); nucleic acids (green); cell walls (pink); protein (purple).
