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. 2018 Aug 31;9:2062. doi: 10.3389/fmicb.2018.02062

FIGURE 3.

FIGURE 3

Analysis of AWCD during the 10-day incubation period (28°C) of soil samples in Biolog EcoPlates (data represent means with standard errors of three replicate plates) (A); RDA biplot showing the relationship between heavy metals and 31 carbon sources (B); and RDA biplot showing the relationship between 31 carbon sources and SOC, DOC, POC, and MBC (C). 31 carbon sources are indicated as follows: A1, D-xylose; A2, α-D-lactose; A3, β-methyl-D-glucoside; A4, α-D-glucose-1-phosphate; A5, α-cyclodextrin; A6, glycogen; A7, D-cellobiose; A8, L-arginine; A9, L-asparagine; A10, L-phenyalanine; A11, L-serine; A12, L-threonine; A13, glycyl-L-glutamic acid; A14, pyruvic acid methyl ester; A15, Tween 40; A16, Tween 80; A17, D-galactonic acid γ-lactone; A18, i-erythritol; A19, D-mannitol; A20, D, L-α-glycerol phosphate; A21, phenylethylamine; A22, putrescine; A23, N-acetyl-D-glucosamine; A24, D-galacturonic acid; A25, D-glucosaminic acid; A26, 2-hydroxybenzoic acid; A27, 4-hydroxybenzoic acid; A28, γ-hydroxybutyric acid; A29, itaconic acid; A30, α-ketobutyric acid; and A31, D-malic acid. All data were normalized to the initial optical density at time zero; plates were read at 590 nm. Abbreviations are the same as those listed for Table 1.