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Table 1 Osmoadaptation of rhizobial strains at four different PEG-6000 levels

From: Differential response of single and co-inoculation of Rhizobium leguminosarum and Mesorhizobium ciceri for inducing water deficit stress tolerance in wheat

Isolates

Optical density

Rhizobial population counts (CFU mL−1 × 103)

0% PEG (− 0.05 MPa)

10% PEG (− 0.65 MPa)

20% PEG (− 1.57 MPa)

30% PEG (− 2.17 MPa)

0% PEG (− 0.05 MPa)

10% PEG (− 0.65 M Pa)

20% PEG (− 1.57 MPa)

30% PEG (− 2.17 MPa)

Lentil rhizobia

 SRL1

4.4 ± 0.15

3.7 ± 0.15

3.1 ± 0.09

2.6 ± 0.12

27.27 ± 0.35

22.86 ± 0.60

16.14 ± 0.27

8.9 ± 0.47

 SRL2

5.6 ± 0.09

4.6 ± 0.09

4.1 ± 0.21

3.1 ± 0.20

30.49 ± 0.75

25.71 ± 0.55

18.31 ± 0.16

10.3 ± 0.09

 SRL3

4.3 ± 0.12

3.7 ± 0.12

2.9 ± 0.03

2.5 ± 0.15

25.55 ± 0.70

20.24 ± 0.73

12.76 ± 0.35

6.6 ± 0.54

 SRL4

4.5 ± 0.09

3.9 ± 0.19

3.4 ± 0.18

2.6 ± 0.18

28.18 ± 0.32

23.32 ± 0.20

16.29 ± 0.20

8.7 ± 0.43

 SRL5

6.2 ± 0.03

5.2 ± 0.03

4.6 ± 0.10

3.3 ± 0.06

31.52 ± 0.45

27.83 ± 0.43

18.81 ± 0.55

11.7 ± 0.31

 SRL6

3.2 ± 0.05

2.6 ± 0.05

2.0 ± 0.05

1.4 ± 0.02

21.40 ± 0.34

20.56 ± 0.39

13.71 ± 0.02

5.8 ± 0.26

 SRL7

3.5 ± 0.12

2.7 ± 0.12

2.1 ± 0.23

1.6 ± 0.09

22.57 ± 0.34

17.89 ± 2.11

11.89 ± 2.02

5.6 ± 1.28

 SRL8

3.6 ± 0.07

3.0 ± 0.07

2.3 ± 0.12

1.8 ± 0.03

23.11 ± 0.40

21.54 ± 0.24

13.86 ± 0.12

8.8 ± 0.27

 SRL9

4.5 ± 0.06

4.2 ± 0.06

3.6 ± 0.15

2.7 ± 0.20

28.62 ± 0.34

21.98 ± 0.13

15.38 ± 0.31

8.7 ± 0.34

 SRL10

5.0 ± 0.03

4.3 ± 0.03

3.8 ± 0.26

2.9 ± 0.19

28.95 ± 0.09

24.59 ± 0.25

17.29 ± 0.25

10.1 ± 0.26

Chickpea rhizobia

 SRC1

6.7 ± 0.15

5.5 ± 0.15

4.3 ± 0.15

3.7 ± 0.12

38.28 ± 0.53

36.1 ± 0.27

25.3 ± 0.20

11.9 ± 1.07

 SRC2

7.1 ± 0.19

5.7 ± 0.19

5.0 ± 0.12

4.0 ± 0.10

41.35 ± 0.53

38.7 ± 0.25

28.0 ± 0.44

13.8 ± 0.37

 SRC3

7.4 ± 0.18

6.2 ± 0.18

5.1 ± 0.03

4.3 ± 0.15

42.75 ± 0.36

40.4 ± 0.33

30.8 ± 0.45

15.4 ± 0.62

 SRC4

8.1 ± 0.12

7.1 ± 0.12

6.4 ± 0.15

5.1 ± 0.12

43.62 ± 0.28

40.8 ± 0.67

30.6 ± 0.70

15.7 ± 0.76

 SRC5

6.2 ± 0.15

5.1 ± 0.15

3.8 ± 0.32

3.2 ± 0.18

37.82 ± 0.51

34.8 ± 0.65

24.7 ± 0.66

10.1 ± 0.41

 SRC6

6.5 ± 0.20

5.3 ± 0.20

3.9 ± 0.29

3.4 ± 0.07

38.78 ± 0.37

36.3 ± 0.48

26.7 ± 0.30

15.3 ± 2.42

 SRC7

6.9 ± 0.09

5.6 ± 0.21

4.7 ± 0.12

3.8 ± 0.03

40.90 ± 0.29

37.9 ± 0.27

28.3 ± 0.29

13.4 ± 0.22

 SRC8

8.9 ± 0.09

7.9 ± 0.09

7.0 ± 0.38

6.5 ± 0.12

48.50 ± 0.31

45.4 ± 0.30

34.2 ± 0.74

19.9 ± 0.48

 SRC9

7.8 ± 0.15

7.0 ± 0.15

5.6 ± 0.18

5.4 ± 0.15

43.41 ± 0.54

40.6 ± 0.25

31.0 ± 0.24

15.6 ± 0.47

 SRC10

8.5 ± 0.23

7.5 ± 0.23

6.4 ± 0.24

5.9 ± 0.19

44.52 ± 0.30

40.8 ± 0.19

30.8 ± 0.39

15.5 ± 0.63

  1. Data are the averages of three replications ± standard error