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. 2019 Apr 1;14(4):e0214509. doi: 10.1371/journal.pone.0214509

Fig 1.

Fig 1

SEM images (Scale bar is 50 μm.) of wheat seed surface treated for 90 s with (a) control (no plasma), (b) Ar/O2 and (c) Ar/Air (d) seed pH and (e) media pH. Different letters indicate significant differences between mean ± SD of treatments (n = 3) at P < 0.05 significance level, where applicable.