Table 2. Effects of Si and SAR on root phenotypic traits of rice seedlings.
| SAR(pH) | Si(mM) | TRL (cm) | RSA (cm2) | RV (cm3) | AD (cm) | RTN |
|---|---|---|---|---|---|---|
| 6.5 | 0 | 60.605±2.328 de(100.00) | 10.042±0.233 fgh(100.00) | 0.265±0.013 hi(100.00) | 0.621±0.010 fg(100.00) | 181.40±7.27 ef(100.00) |
| 1 | 67.207±2.202 c(110.89) | 12.307±0.723 de(122.56) | 0.302±0.019 fg(113.96) | 0.644±0.031 defg(103.70) | 226.90±10.14 cd (125.08) | |
| 2 | 66.596±2.557 c(109.89) | 11.183±0.805 ef(111.36) | 0.280±0.017 gh(105.66) | 0.654±0.011 cde(105.31) | 244.42±15.04 bc(134.74) | |
| 4 | 46.280±1.688 g(76.36) | 7.820±0.414 ij(77.87) | 0.203±0.011 l(76.60) | 0.745±0.023 a(119.97) | 142.67±15.41 g (78.65) | |
| 4.0 | 0 | 70.375±2.198 c(116.12) | 13.313±1.601 cd(132.57) | 0.365±0.015 d(137.74) | 0.647±0.009 gef(104.19) | 217.07±12.39 d(119.66) |
| 1 | 93.057±1.096 a(153.55) | 18.332±1.151 a(192.55) | 0.507±0.028 a(191.32) | 0.675±0.022 bc(108.70) | 308.90±12.15 a (170.29) | |
| 2 | 90.005±3.931 a(148.51) | 17.424±0.242 a(173.51) | 0.476±0.017 b(179.62) | 0.683±0.011 b(109.98) | 325.56±15.98 a(179.47) | |
| 4 | 62.607±3.432 d(103.30) | 10.155±0.800 fgh(101.13) | 0.305±0.018 fg(115.09) | 0.666±0.028 bcd(107.25) | 189.86±18.46 e (104.66) | |
| 3.0 | 0 | 60.753±2.609 de(100.24) | 11.457±0.678 def(114.09) | 0.333±0.012 e(125.66) | 0.636±0.007 efg(102.42) | 176.20±17.12 ef(97.13) |
| 1 | 81.491±2.491 b(134.46) | 15.123±1.054 b(150.60) | 0.421±0.011 c(158.87) | 0.654±0.019 cde(105.31) | 235.67±11.23 cd(129.92) | |
| 2 | 78.540±4.330 b(129.59) | 14.078±1.001 bc(140.19) | 0.396±0.014 c(149.43) | 0.663±0.011 bcd(106.76) | 262.06±17.54 b(144.47) | |
| 4 | 58.261±2.308 ef(96.13) | 10.259±0.625 fjh(102.16) | 0.309±0.017 ef(116.60) | 0.657±0.010 bcde(105.80) | 170.76±13.52ef(94.13) | |
| 2.0 | 0 | 40.327±1.416 h(66.54) | 6.485±0.663 j(64.58) | 0.207±0.009 l(78.11) | 0.720±0.013 a(115.94) | 159.97±13.47 fg(88.19) |
| 1 | 57.525±2.629 ef(94.92) | 9.454±0.826 gh(94.14) | 0.233±0.013 jk(87.92) | 0.633±0.005 fg(101.93) | 184.57±16.96 e(101.75) | |
| 2 | 60.281±1.583 de(99.47) | 9.624±0.362 gh(95.84) | 0.253±0.017 ij(95.47) | 0.641±0.009 defg(103.22) | 190.36±17.64 e(104.94) | |
| 4 | 54.100±2.101 f(89.27) | 9.130±0.687 hi(90.92) | 0.211±0.003 kl(79.62) | 0.617±0.006 g(99.36) | 166.74±13.14 efg(91.92) | |
| F | 46.277 | 34.623 | 62.362 | 0.640 | 35.923 | |
| p | 0.000* | 0.000* | 0.000* | 0.698 | 0.000* | |
Abbreviations: SAR, simulated acid rain; Si, silicon; TRL, total root length; RSA, root surface area; RV, root volume; AD, average diameter; RTN, root tip number.
The values represent the means ± standard deviation, n = 3. The value in brackets is relative percentage (the ratio of absolute value to the control).
Significant differences (p<0.05) are indicated by different letters in the same column.
* Significant at the 0.05 level.