Table 1.
Effect of methyl jasmonate (MeJA), salicylic acid (SA), and their combined application on the growth parameters of French beans under drought stress.
| Treatment | Root Length (cm) | Shoot Length (cm) | Root Dry Weight (g) | Shoot Dry Weight (g) | Leaf Dry Weight (g) | Total Dry Weight (g) |
|---|---|---|---|---|---|---|
| Control | 58.63 ± 3.45 a | 36.49 ± 0.87 a | 2.88 ± 0.26 a | 9.04 ± 0.74 a | 9.93 ± 0.77 a | 21.86 ± 1.62 a |
| Drought (D) | 55.69 ± 1.23 a | 21.27 ± 0.65 c | 1.38 ± 0.12 b | 2.77 ± 0.21 c | 2.61 ± 0.28 d | 6.76 ± 0.35 c |
| D + MeJA | 57.59 ± 2.13 a | 22.10 ± 0.49 c | 1.53 ± 0.17 b | 3.55 ± 0.19 c | 3.91 ± 0.37 b c | 8.99 ± 0.64 c |
| D + SA | 58.91 ± 2.55 a | 22.46 ± 0.63 c | 1.54 ± 0.18 b | 3.69 ± 0.49 c | 3.62 ± 0.13 c d | 8.85 ± 0.65 c |
| D + MeJA + SA | 59.81 ± 1.07 a | 25.63 ± 0.55 b | 1.86 ± 0.19 b | 5.09 ± 0.28 b | 4.89 ± 0.12 b | 11.84 ± 0.23 b |
Values represent the mean ± SE. Values in a column with distinct letter(s) were significantly different at p ≤ 0.05. Control—plants grown under non-stress, well-irrigated conditions; drought—plants grown with a steady decline in moisture availability; D + MeJA—drought-stressed plants pre-treated (seed and foliar) with 20 µM methyl jasmonate; D + SA—drought-stressed plants pre-treated (seed and foliar) with 2 mM salicylic acid; D + MeJA + SA—drought-stressed plants pre-treated (seed and foliar) with a combination of 10 µM methyl jasmonate and 1 mM salicylic acid.