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Table 3 Analysis of variance and mean comparisons for ion concentrations (K+ and Na+) in the shoots and roots of maize plants grown under two salinity levels and treated with DCPTA at four rates of application

From: Exogenous 2-(3,4-Dichlorophenoxy) triethylamine alleviates salinity stress in maize by enhancing photosynthetic capacity, improving water status and maintaining K+/Na+ homeostasis

Source of variation

Shoot

Root

Na+ content (mg·g−1 DW)

K+ content (mg·g−1 DW)

Na+/K+ ratio

Na+ content (mg·g−1 DW)

K+ content (mg·g−1 DW)

Na+/K+ ratio

NaCl (mM) (N)

 0

2.43 ± 0.29b

50.39 ± 3.11a

21.11 ± 0.01a

5.13 ± 0.60b

22.57 ± 2.03a

0.23 ± 0.03b

 150

17.54 ± 5.15a

33.05 ± 6.67b

2.11 ± 0.27b

29.20 ± 5.36a

10.64 ± 3.79b

3.27 ± 1.64a

DCPTA (μM) (D)

 0

14.02 ± 12.30a

38.57 ± 13.43a

11.37 ± 0.50a

20.37 ± 15.87a

14.27 ± 8.04a

2.79 ± 1.73a

 20

8.22 ± 6.39a

43.34 ± 8.83a

13.21 ± 0.19a

16.34 ± 11.34a

18.78 ± 6.21a

1.15 ± 0.98a

 100

7.65 ± 5.51a

46.11 ± 5.80a

12.00 ± 0.14a

13.64 ± 9.73a

18.91 ± 4.42a

0.86 ± 0.72a

 400

10.04 ± 7.74a

38.86 ± 10.58a

9.86 ± 0.29a

18.30 ± 14.24a

14.47 ± 7.21a

2.19 ± 1.08a

Significance

 NaCl (mM) (N)

***

***

***

***

***

***

 DCPTA (μM) (D)

***

***

**

***

***

***

 N × D

***

***

ns

***

***

***

  1. ns, *, **, and ***: Not significant or significant at P ≤ 0.05, 0.01, and 0.001, respectively. The different letters within each column indicate significant differences according to Duncan’s multiple-range test (P = 0.05)