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Table 1 Ion concentrations of Cd, Cu and Si in the rice root under stress

From: Silicon mitigates heavy metal stress by regulating P-type heavy metal ATPases, Oryza sativalow silicon genes, and endogenous phytohormones

Treatments Ion concentrations (μmol g-1)
  Cd Cu Si
1-DAT
Control ND 20.8 ± 2.1 c 201.32 ± 3.21 d
Si ND 37.8 ± 4.6 c 765.8 ± 39.8 c
Cu ND 2777.4 ± 207.1 a 677.6 ± 22.7 c
Cd 611.5 ± 78.0 a 39.2 ± 2.1 c 788.1 ± 58.4 c
Cu + Si ND 1374.0 ± 179.6 b 3482.6 ± 155.9 a
Cd + Si 263.2 ± 14.2 b 28.0 ± 3.6 c 2104.2 ± 17.3 b
5-DAT
Control ND 24.5 ± 1.2 d 234.2 ± 5.2 d
Si ND 45.0 ± 4.9 c 600.5 ± 8.9 c
Cu ND 2398.3 ± 88.0 a 612.8 ± 65.7 c
Cd 934.0 ± 49.4 a 45.6 ± 4.7 c 797.7 ± 54.2 c
Cu + Si ND 1903.4 ± 14.8 b 1778.8 ± 35.4 a
Cd + Si 399.6 ± 15.7 b 37.7 ± 4.1 c 1383.7 ± 49.8 b
10-DAT
Control ND 31.3 ± 6.1 d 119.2 ± 2.4 d
Si ND 48.8 ± 6.9 c 126.1 ± 9.0 d
Cu ND 1433.8 ± 105.2 a 167.1 ± 14.3 c
Cd 680.7 ± 30.9 a 51.0 ± 2.3 c 170.6 ± 45.0 c
Cu + Si ND 977.8 ± 16.8 b 390.9 ± 19.4 a
Cd + Si 342.0 ± 42.9 b 49.5 ± 0.6 c 231.1 ± 61.7 b
  1. Mean ± standard error from three replications per treatment. ND, Not detected; DAT, Days after treatment. In the column, the same letters indicate not significant difference (P > 0.05) by Duncan’s Multiple Range Test (DMRT).