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. 2017 Oct 25;12(10):e0185178. doi: 10.1371/journal.pone.0185178

Fig 7. Influence of perchlorates.

Fig 7

Influence of perchlorates on tolerance to desiccation (A) and ionizing radiation (B). N0: Viable cells without desiccation / irradiation, N: Viable cells after desiccation / irradiation. Recovery was performed under standard cultivation conditions without perchlorate (n = 3). Asterisks denote significant difference (p < 0.05) to the control (survival after desiccation without perchlorates). (A) Black columns: Cells were exposed (15 min) to 0.5% perchlorate (0.5% NaClO4 = 35.6 mM; 0.5% Ca(Cl4)2 = 20.9 mM; 0.5% Mg(ClO4)2 = 22.4 mM) before desiccation treatment (24 h, anoxic conditions). Grey columns: Cells were exposed (15 min) to 1.0% perchlorate (1.0% NaClO4 = 71.2 mM; 1.0% Ca(Cl4)2 = 41.9 mM; 1.0% Mg(ClO4)2 = 44.8 mM) before desiccation treatment (24 h, anoxic conditions). (B) Cells were exposed (15 min) to the indicated perchlorates before treatment with ionizing radiation up to 800 Gy. Black circles: 0.5% Mg(ClO4)2; White circle: 1% Mg(ClO4)2; Black triangle: 0.5% Na(ClO4); White triangle: 1% Na(ClO4); Black square 0.5% Ca(ClO4)2; White square: 1% Ca(ClO4)2.