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SEM images of (A, G) 0, (B, H) 0.5, (C, I) 1, (D, J) 3, (E, K) 5 and (F, L) 10-min plasma treated Arabidopsis seed surface. The magnification for all images was 200× (top) and 1000× (bottom). (M) Effect of plasma on atomic ratio of C and O in Arabidopsis seed surface.
