Table 2 Germination percentage, seedling length, and fresh weight of 21-day-old pea seedlings treated with NaCl and SWEs (S. vulgare, C. sinuosa, and P. pavonica) single and combined treatments

Control

84.53 ± 0.46 ^cd

14.1 ± 0.36^ab

19.3 ± 0.95^bc

1.35 ± 0.009^b

2.34 ± 0.053^bc

 50 mM NaCl

73.67 ± 0.81^f

11.3 ± 0.26^def

16.2 ± 0.15^ef

0.86 ± 0.015^f

1.93 ± 0.011^ef

 100 mM NaCl

66.93 ± 1.66 ^h

10.6 ± 0.25^efg

15.6 ± 0.351 ^fg

0.54 ± 0.002^ij

1.08 ± 0.002 ^k

 150 mM NaCl

63.60 ± 0.40ⁱ

8.7 ± 0.62 ^h

13.8 ± 0.26 ^h

0.40 ± 0.001 ^l

0.84 ± 0.001 ^m

Sargussum vulgare

92.80 ± 0.80^a

15.5 ± 0.50^a

21.0 ± 0.10^a

1.47 ± 0.011^a

2.64 ± 0.005^a

 S. vulgare + 50 mM NaCl

81.60 ± 0.80^de

13.8 ± 0.26^bc

17.6 ± 0.38^de

1.06 ± 0.002^d

2.06 ± 0.001^d

 S. vulgare + 100 mM NaCl

74.07 ± 1.14^f

13.8 ± 1.06^bc

17.8 ± 0.21 ^cd

0.72 ± 0.008 ^h

1.78 ± 0.015 ^g

 S. vulgare + 150 mM NaCl

71.40 ± 0.87 ^fg

10.3 ± 0.35 ^fg

14.4 ± 0.56^gh

0.95 ± 0.010^e

1.56 ± 0.003 ^h

Colpomenia sinuosa

85.87 ± 1.22^c

14.9 ± 0.324^ab

20.7 ± 0.29^ab

1.16 ± 0.038^c

2.26 ± 0.020^c

 C. sinuosa + 50 mM NaCl

73.67 ± 0.81^f

11.8 ± 0.21^de

17.6 ± 0.55^de

0.82 ± 0.008 ^fg

1.98 ± 0.015^de

 C. sinuosa + 100 mM NaCl

72.80 ± 0.80^f

12.3 ± 0.416^d

17.8 ± 0.568 ^cd

0.56 ± 0.017ⁱ

1.43 ± 0.020ⁱ

 C. sinuosa + 150 mM NaCl

68.53 ± 1.22^gh

9.6 ± 0.60^gh

13.0 ± 0.057 ^h

0.48 ± 0.004 ^k

1.02 ± 0.014^kl

Pandia pavonica

89.07 ± 1.22^b

14.6 ± 0.35^ab

19.5 ± 0.65^ab

1.42 ± 0.010^a

2.41 ± 0.086^b

 P. pavonica + 50 mM NaCl

79.47 ± 0.46^e

12.5 ± 0.40 ^cd

17.2 ± 0.15^de

0.79 ± 0.051 ^g

1.84 ± 0.047 ^fg

 P. pavonica + 100 mM NaCl

72.00 ± 1.20^f

12.1 ± 0.15^d

16.6 ± 0.49^def

0.52 ± 0.006^ijk

1.31 ± 0.055^j

 P. pavonica + 150 mM NaCl

65.87 ± 1.41^hi

9.6 ± 0.53^gh

15.4 ± 0.46 ^fg

0.48 ± 0.003^jk

0.94 ± 0.006 ^l

Significance

 Salinity (S)

938.08 ***

254.73 ***

269.62 ***

4881.14 ***

3831.59 ***

 Seaweed extracts (SWEs)

121.06 ***

44.58 ***

18.67 ***

685.65 ***

463.56 ***

  (S × SWEs)

9.19 ***

2.26 *

6.66 ***

94.08 ***

52.13 ***