Table 4 Manganese (Mn), Iron (Fe) Copper (Cu) and Zink (Zn) content in shoot and root of Oryza sativa var. IR64 under As^(III) and Si supplementation at 7 and 15d exposure period. Values are mean (±S.D) of three independent replicates (n = 3). Different letters represent significant differences between each treatment at p < 0.05. The small latter (i.e. a, b, c and d) indicates the significant difference between treatment in same tissue type while capital latter (i.e. A and B) indicates the significant difference between duration among the same treatment in same tissue type.

Mn

0.068 ± 0.004^Ac

0.070 ± 0.003^Ac

0.034 ± 0.001^Ba

0.044 ± 0.003^Bb

0.052 ± 0.002^Aa

0.056 ± 0.014^Aa

0.024 ± 0.013^Ab

0.036 ± 0.001^Bc

Fe

0.442 ± 0.024^Aa

0.472 ± 0.072^Aa

0.286 ± 0.020^Ab

0.367 ± 0.020^Bc

0.308 ± 0.007^Aa

0.314 ± 0.052^Aa

0.195 ± 0.046^Bb

0.233 ± 0.026^Bc

Cu

0.035 ± 0.003^Aab

0.040 ± 0.006^Ab

0.027 ± 0.002^Aa

0.030 ± 0.001^Ba

0.022 ± 0.002^Aa

0.025 ± 0.002^Aa

0.022 ± 0.002^Ba

0.024 ± 0.012^Aa

Zn

0.121 ± 0.027^Ac

0.144 ± 0.045^Bd

0.041 ± 0.010^Ba

0.085 ± 0.001^Bb

0.123 ± 0.016^Bc

0.162 ± 0.041^Bd

0.072 ± 0.001^Ba

0.101 ± 0.002^Bb

C

Si

As

As + Si

C

Si

As

As + Si

Mn

0.072 ± 0.001^Bc

0.072 ± 0.002^Ac

0.026 ± 0.001^Aa

0.033 ± 0.002^Ab

0.065 ± 0.012^Bb

0.068 ± 0.001^Bb

0.021 ± 0.001^Aa

0.028 ± 0.001^Aa

Fe

0.478 ± 0.051^Ab

0.523 ± 0.040^Bb

0.221 ± 0.025^Aa

0.292 ± 0.050^Aa

0.326 ± 0.007^Bb

0.361 ± 0.043^Bb

0.152 ± 0.056^Aa

0.171 ± 0.062^Aa

Cu

0.038 ± 0.002^Ab

0.040 ± 0.001^Ab

0.024 ± 0.005^Aa

0.028 ± 0.002^Aa

0.025 ± 0.003^Ab

0.029 ± 0.001^Ab

0.019 ± 0.001^Aa

0.021 ± 0.001^Aa

Zn

0.196 ± 0.011^Bd

0.127 ± 0.036^Ac

0.037 ± 0.002^Aa

0.082 ± 0.001^Ab

0.100 ± 0.04^Ac

0.112 ± 0.037^Ac

0.053 ± 0.002^Aa

0.096 ± 0.001^Ab