Decreased abundances of mycorrhizal fungi and Gram-negative bacteria during RS-EX treatment as determined by phospholipid fatty acid (PLFA) analyses of soil samples.

PLFA analyses of A. untreated control soil samples and B. of soil during RS-EX exposure were performed by GC-MS measurements. Marker fatty acids for different taxonomic groups are listed in S2 Table. Data show means ± SD (n = 3). Significant differences between RS-EX treated and control samples are indicated by asterisks (t-test; *, p<0.05; **, p<0.005). 32 d recovery, 28 d of RS-EX treatment followed by 32 d without treatment. Arrows indicate increased or decreased amounts of bacterial or fungal PLFAs after RS-EX application.