Table 2.
Concentrations of Na+, K+, and K+: Na+ ratio in Jatropha curcas plants subjected to the salt and drought stresses induced by NaCl and low water supply, respectively. Data refer to mean values (n = 5).
| Treatment | Na+ | K+ | K+: Na+ Ratio | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Leaf | Stem | Root | Leaf | Stem | Root | Leaf | Stem | Root | |
| Control | 0.12e | 0.14e | 0.16e | 1.62a | 0.68a | 0.55a | 13.06a | 4.72a | 3.49a |
| 7.5 dS m−1 (well-watered) | 0.60d | 0.66d | 0.79d | 0.89c | 0.48c | 0.41b | 1.483c | 0.73c | 0.52c |
| 15 dS m−1 (well-watered) | 1.29b | 1.51b | 1.89b | 0.83c | 0.43cd | 0.38b | 0.643c | 0.29c | 0.20c |
| Drought | 0.16e | 0.18e | 0.19e | 1.24b | 0.57b | 0.49a | 7.949b | 3.28b | 2.53b |
| 7.5 dS m−1+Drought | 1.05c | 1.12c | 1.25c | 0.87c | 0.46c | 0.39b | 0.829c | 0.41c | 0.31c |
| 15 dS m−1+Drought | 1.84a | 2.06a | 2.32a | 0.75d | 0.36d | 0.27c | 0.408c | 0.18c | 0.12c |
Different lowercase letters within a column depict significant differences among treatments, according to Duncan’s Least Significance Test after ANOVA (p < 0.05). Note: Well-watered means plants irrigated to 70% of soil water holding capacity (WHC), while Drought means plants were irrigated to 40% of soil WHC.