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Table 7 Pearson correlation coefficients (r) between maize plants’ growth parameters under salinity stress and growth of bacteria under stresses conditions

From: Maize growth response to different Bacillus strains isolated from a salt-marshland area under salinity stress

Plant growth parameters Bacterial growth
Salinity stress Shoot DW (mg) Root DW (mg) Whole weight (mg/plant) Shoot length (cm) Root length (cm) Whole length (cm) Normal condition Salt Stress Drought Stress Cold Stress Heat stress pH
Shoot DW (mg) 1            
Root DW (mg) 0.688** 1           
Whole weight (mg/plant) 0.817** 0.981** 1          
Shoot length 0.879** 0.471* 0.611** 1         
Root length 0.717** 0.309 ns 0.439* 0.739** 1        
Whole length 0.884** 0.463* 0.607** 0.995** 0.802** 1       
Normal condition −0.028 ns −0.111 ns −0.096 ns −0.069 ns −0.051 ns −0.068 ns 1      
Salt stress −0.076 ns 0.005 ns −0.017 ns −0.120 ns −0.122 ns −0.125 ns 0.813** 1     
Drought stress −0.250 ns −0.221 ns −0.243 ns −0.230 ns −0.188 ns −0.232 ns 0.885** 0.684** 1    
Cold stress 0.159 ns 0.108 ns 0.129 ns −0.025 ns −0.131 ns −0.041 ns 0.581** 0.524** 0.491* 1   
Heat stress −0.017 ns −0.289 ns −0.233 ns −0.039 ns 0.233 ns −0.001 ns 0.144 ns 0.029 ns −0.014 ns −0.287 ns 1  
pH −0.055 ns −0.170 ns −0.150 ns −0.136 ns 0.112 ns −0.104 ns 0.297 ns 0.208 ns 0.265 ns −0.208 ns 0.754** 1
  1. **r: Significantly different at P < 0.01; *r: Significantly different at P < 0.05; ns Not significantly different (P > 0.05)