Bacillus subtilis HG-15, a Halotolerant Rhizoplane Bacterium, Promotes Growth and Salinity Tolerance in Wheat (Triticum aestivum)
Table 4
The interactive effects (two-way ANOVA) of both salinity and the bacterium on the measured parameters.
(a)
Group
pH
EC
Organic matter
Olsen-P
Total N
Available N
Na
HG-15
68.535
≤ 0.001
145.997
≤0.001
908.604
≤0.001
6.017
0.030
167.186
≤0.001
48.793
≤0.001
33.947
≤0.001
Salt
15.305
≤0.001
6316.708
≤0.001
308.999
≤0.001
3.817
0.052
162.139
≤0.001
82.217
≤0.001
266.133
≤0.001
4.078
0.045
24.481
≤0.001
75.668
≤0.001
0.517
0.609
12.810
0.001
2.913
0.093
2.537
0.120
(b)
Group
K
Ca
Mg
Dry weight
Fresh weight
Plant height
Root length
HG-15
17.668
0.001
7.003
0.021
47.294
≤0.001
213.390
≤0.001
65.135
≤0.001
213.390
≤0.001
65.135
≤0.001
Salt
21.402
≤0.001
11.735
0.001
25.205
≤0.001
155.056
≤0.001
72.974
≤0.001
155.056
≤0.001
72.974
≤0.001
1.415
0.281
0.168
0.847
1.018
0.391
14.222
0.001
4.887
0.028
14.222
0.001
4.887
0.028
(c)
Group
A
gsw
E
Ci
Chl a
Chl b
Fv/Fm
HG-15
11.917
0.005
29.032
≤0.001
19.478
0.001
2.268
0.158
25.887
≤0.001
12.366
0.004
2.354
0.151
Salt
33.375
≤0.001
66.938
≤0.001
96.001
≤0.001
10.053
0.003
36.902
≤0.001
33.775
≤0.001
23.968
≤0.001
0.835
0.458
5.049
0.026
1.663
0.230
0.901
0.432
5.425
0.021
0.491
0.624
0.622
0.553
(d)
Group
Proline
TSS
Total protein
MDA
POD
SOD
CAT
HG-15
273.491
≤0.001
198.372
≤0.001
171.471
≤0.001
327.578
≤0.001
7.205
0.020
0.829
0.380
10.479
0.007
Salt
449.485
≤0.001
117.815
≤0.001
112.776
≤0.001
140.613
≤0.001
91.949
≤0.001
21.897
≤0.001
338.937
≤0.001
104.857
≤0.001
7.318
0.008
4.670
0.032
2.468
0.127
0.934
0.420
0.481
0.630
0.771
0.484
Notes: the interactive effect sizes of the bacterium and different soils on rhizosphere soil parameters and plant parameters based on two-way ANOVA with 95% confidence intervals. Data in the table are values. and . Dry weight: total weight of roots and shoots; fresh weight: total fresh weight of roots and shoots; A: net photosynthetic rate; gsw: stomatal conductance; E: transpiration rate; Ci: intercellular carbon dioxide concentration; Chl a: chlorophyll a; Chl b: chlorophyll b; TSS: soluble sugar; MDA: malondialdehyde; POD: peroxidase; SOD: superoxide dismutase; CAT: catalase. Bold indicates that there is a significant interaction between the bacterium and soil.
