Table 1
Representation of treatments and controls.
| Salt conditions | NaCl (salt control) 35 plants | NaCl + KIO3 35 plants |
|---|---|---|
| Normal conditions | Absolute control (only Steiner solution) 35 plants | |
[i] KIO3, potassium iodate.
Figure 1
Effect of iodine application in vegetative biomass, in three samplings [(1) 41 dat, (2) 71 dat, (3) 125 dat]; the units are expressed in grams. Means with same letters do not show statistically significant differences, p ≤ 0.05, vertical bars represent standard deviations. KIO3, potassium iodate.
Figure 2
Effects of iodine application in total tomato yield expressed in kg F.W.; treatments control, salt control (NaCl) and KIO3. Means with same letters do not show statistically significant differences, p ≤ 0.05, vertical bars represent standard deviations. KIO3, potassium iodate.
Table 2
Effects of iodine on fruit number, plant fresh weight, height, number of foliole and stem diameter of tomato plants.
| Treatment | Fruit number | Fresh weight (g) | Height (cm) | ||||
|---|---|---|---|---|---|---|---|
| Sampling | 1 | 2 | 3 | 1 | 2 | 3 | |
| NaCl | 21.6 c* | 231.96 b | 609.32 b | 784.80 b | 52.40 b | 61.70 b | 73.60 b |
| KIO3 + NaCl | 34.2 b | 245.96 b | 683.16 b | 760.22 b | 51.10 b | 61.80 b | 70.80 b |
| Control | 48.8 a | 394.42 a | 833.06 a | 1914.92 a | 59.80 a | 94.70 a | 96.00 a |
| Foliole number | Stem diameter (cm) | ||||||
| 1 | 2 | 3 | 1 | 2 | 3 | ||
| NaCl | 151.00 b | 294.60 b | 780.80 b | 9.80 b | 11.80 a | 15.00 b | |
| KIO3 + NaCl | 142.40 b | 307.40 b | 603.00 b | 10.80 b | 13.20 a | 15.20 b | |
| Control | 217.50 a | 462.20 a | 1476.00 a | 14.40 a | 12.80 a | 18.60 a | |
Table 3
Effects of iodine on macroelement content in tomato leaves.
| Treatments | N | P | Ca | K | Mg | Na |
|---|---|---|---|---|---|---|
| (g · kg−1 D.W.) | ||||||
| NaCl | 19.10 b* | 3.56 a | 36.83 bc | 21.03 a | 16.03 a | 46.88 a |
| KIO3 + NaCl | 22.60 a | 4.05 a | 31.60 c | 23.63 a | 13.16 a | 35.27 a |
| Control | 17.23 b | 2.94 a | 44.52 a | 29.66 a | 19.91 a | 7.14 b |
Table 4
Effect of iodine on microelement content in tomato leaves.
| Treatments | Fe | Zn | Cu | Mn |
|---|---|---|---|---|
| (mg · kg−1 D.W.) | ||||
| NaCl | 192.34 a* | 51.60 a | 13.43 a | 245.23 a |
| KIO3 + NaCl | 145.80 a | 43.90 a | 17.12 a | 241.68 a |
| Control | 100.86 b | 41.50 a | 5.63 b | 183.29 a |
Table 5
Effects of iodine on macroelement content in tomato fruit.
| Treatments | N | P | Ca | K | Mg | Na |
|---|---|---|---|---|---|---|
| (g · kg−1 D.W.) | ||||||
| NaCl | 24.02 a | 2.59 a | 1.00 bc | 58.31 a | 2.72 a | 6.12 a |
| KIO3 + NaCl | 18.27 b | 2.51 a | 0.53 c | 52.32 a | 2.01 a | 9.04 a |
| Control | 15.39 c | 2.12 a | 2.02 a | 58.29 a | 2.68 a | 2.32 b |
Table 6
Effect of iodine on microelement content in tomato fruits.
| Treatments | Fe | Zn | Cu | Mn |
|---|---|---|---|---|
| (mg · kg−1 D.W.) | ||||
| NaCl | 2.96 b | 27.69 a | 11.87 a | 12.81 a |
| KIO3 + NaCl | 1.83 b | 24.35 a | 10.12 a | 10.89 a |
| Control | 28.04 a | 23.64 b | 8.38 a | 13.29 a |
Figure 3
Iodine concentration in leaves and fruits of tomato, expressed in mg · kg−1 D.W. Means with same letters do not show statistically significant differences, p ≤ 0.05, vertical bars represent standard deviations. KIO3, potassium iodate.
Table 7
Effect of iodine on antioxidant content in tomato fruit
| Treatments | CA (mM trolox) | AsA* (g · kg−1) | Lic (mg · kg−1) | GSH (g · kg−1) | Prot (g · kg−1) | CAT (U · min−1) | GPX (U · min−1) | APX (U · min−1) | SOD (U · min−1) |
|---|---|---|---|---|---|---|---|---|---|
| NaCl | 51.8 a** | 37 b | 19 a | 0.68 a | 16.1 b | 0.12 a | 1.6 a | 0.01 a | 5.68 a |
| NaCl+KIO3 | 21.2 b | 59.5 a | 4.4 b | 0.87 a | 16.2 a | 0.11 a | 1.6 a | 0.01 a | 5.40 a |
| Control | 29.6 b | 70.8 a | 22.5 a | 0.99 a | 12.5 c | 0.14 a | 3.1 b | 0.01a | 6.52 a |