Fig. 2. Aggregated normalized expression of extracellular protease structural groups over time in wild oat Avena fatua microcosms with bulk, rhizosphere and root litter-amended soils.

Normalized expression per replicate is plotted as dots on top of the bars. Experimental groups shown per time point are (left to right): unamended bulk soil (B), litter-amended bulk soil (BL), unamended rhizosphere (R) and litter-amended rhizosphere (RL). Extracellular protease groups are (left to right): serine-, metallo- and cysteine-protease.