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. 2018 Oct 23;9:2507. doi: 10.3389/fmicb.2018.02507

FIGURE 1.

FIGURE 1

Heavy metal accumulation in the rhizosphere of sunflower grown under drought and control conditions and treated with PGPR and SA. Error bars represent standard errors of the mean (n = 4) at each time point. Different letters indicate significant differences (P < 0.05) among treatments. T1, seeds treated with PGPR P1; T2, seeds treated with PGPR P1 and sprayed with SA; T3, seeds treated with PGPR P2; T4, seeds treated with PGPR P2 and sprayed with SA; T5, coinocualtion of PGPR P1 and P2; T6, seeds treated with PGPR P1 and P2 + sprayed with SA; T7, foliar application of SA; T8, untreated uninoculated irrigated C; T9, untreated uninoculated stress C (P1: Planomicrobium chinense strain P1; P2: Bacillus cereus strain P2).